WO2008030709A2

WO2008030709A2 - Filter packages, package assemblies, and methods for installing and/or removing filters

Info

Publication number: WO2008030709A2
Application number: PCT/US2007/076634
Authority: WO
Inventors: Mark Milum
Original assignee: Pall Corp
Current assignee: Pall Corp
Priority date: 2006-09-05
Filing date: 2007-08-23
Publication date: 2008-03-13
Anticipated expiration: 2009-03-05
Also published as: WO2008030709A3

Abstract

Filter packages and package assemblies contain filters in enclosed spaces, including, for example, leak-resistant enclosed spaces. Methods for installing and/or removing filters protect new filters from contamination and damage, contain spent filters and the mess associated with spent filters, and protect operators from contamination.

Description

FILTER PACKAGES, PACKAGE ASSEMBLIES, AND METHODS FOR INSTALLING AND/OR REMOVING FILTERS

FIELD OF THE INVENTION

[0001] The present invention relates to packages for a wide variety of filters and methods for installing and/or removing the filters. Many filter assemblies comprise a replaceable filter which can be installed in a reusable housing. The filter includes a filter medium which separates one or more substances from, or concentrates one or more substances in, a fluid that flows through the filter. The reusable housing may include a header or manifold which is removably attached to a bowl or tank. Changing the filter entails detaching the bowl from the header, removing a spent filter from the header, installing a new replacement filter onto the header, and reattaching the bowl to the header. Many other filter assemblies comprise a disposable filter that includes a filter medium permanently contained in a disposable housing. The disposable housing may have two or more ports that can be removably installed onto a header or manifold. Changing the filter entails detaching a spent disposable filter, including the spent disposable housing, from the header and installing a new disposable filter, including the new disposable housing, to the header. Packages embodying the invention may be used for both replaceable and disposable filters, as well as filters of other types.

DISCLOSURE OF THE INVENTION

[0002] According to one aspect of the invention, packages for a filter may comprise a first portion and a second portion removably attached to the first portion to define an enclosed space which accommodates a filter. At least one of the first portion and the second portion includes a mechanical catch configured to releasably engage a filter. [0003] According to another aspect of the invention, packages for a filter may comprise a first portion and a second portion removably attached to the first portion to define an enclosed space which accommodates a filter. The second portion is completely separable from the first portion to open the package and is reattachable to the first portion to reestablish the enclosed space. At least one of the first portion and the second portion includes a collapsible region configured to collapse against and grip a filter.

[0004] According to another aspect of the invention, packages for a filter may comprise a first portion and a second portion. Each portion has a side wall, a closed end, and an open end. The first and second portions are removably attached to one another to define an enclosed space which accommodates a filter. The enclosed space has a height, and the side wall of the first portion and the side wall of the second portion each have a height greater than 50% of the height of the enclosed space.

[0005] According to another aspect of the invention, package assemblies may comprise a filter package and a filter. The filter package includes a recloseable polymeric bag having and a resealable closure which defines an enclosed space within the polymeric bag. The filter is contained within the enclosed space.

[0006] Package assemblies and packages embodying these aspects of the invention have many advantages. One advantage is that a new filter is protected from damage or contamination not only during storage and transport, when it is contained within the enclosed space of the package, but also during installation onto a header. The package may be opened, for example, by removing the second portion from the first portion, and one of the portions may remain with the filter. The filter may then be manipulated into engagement with the header by holding the portion of the package that remains with the filter rather than holding the filter itself. Because an operator is in direct contact with the package, but not the filter, there is little or no damage to or contamination of the filter during installation. This is particularly advantageous for replaceable filters where an exposed filter medium, which is often delicate, might otherwise be damaged or contaminated during installation. Embodiments of the package that include a mechanical catch or a collapsible region allow the filter to be even more precisely manipulated as it is being installed on the header. [0007] Consequently, in accordance with another aspect of the invention, methods for installing a filter may comprise opening a package which contains a filter; holding at least a portion of the package that remains with the filter to manipulate the filter into engagement with a header; and removing the remaining portion of the package from the engaged filter. [0008] Another advantage is the clean, safe removal of a spent filter from the header. After the package has been opened, for example, by removing the second portion from the first portion, one of the portions may be fitted around the spent filter on the header. The spent filter may then be manipulated out of engagement with the header by holding the portion of the package that is fitted to the spent filter rather than holding the spent filter itself. Because an operator is in direct contact with the package, but not the spent filter, there is little or no contact between the operator and the messy spent filter itself or the fluids it contains. Further, because a portion of the package is fitted around the spent filter, there is little or no spillage or leakage as the spent filter is removed from the header. Again, this is particularly advantageous for replaceable filters where an exposed, messy filter medium might otherwise contact an operator or spill fluids. Embodiments of the package that include a mechanical catch or a collapsible region allow the filter to be even more precisely manipulated as it is being removed from the header. Once the spent filter has been removed from the header, the second portion of the package may be reattached to the first portion, neatly containing the spent filter within the enclosed space of the package and preventing any spills or leakage. [0009] Consequently, in accordance with another aspect of the invention, methods for removing a filter may comprise opening a package; fitting at least a portion of the package around a spent filter attached to a header; and holding the package portion to manipulate the spent filter out of engagement with the header.

[0010] Many packages and methods embodying the invention may be used both to remove a spent filter and to install a new filter. For example, a package containing a new filter may be opened by detaching the second portion from the first portion of the package. One of the portions, for example, the second portion, may then be fitted to the spent filter and used to remove the spent filter from a header, while the other portion, for example, the first portion, may remain with the new filter. After the spent filter is removed, the first portion of the package may be used to install the new filter onto the header. The first portion may then be reattached to the second portion to contain the spent filter in the enclosed space of the package. Embodiments of the package in which the side walls of each of the first and second portions have a height greater than 50% of the height of the enclosed space are particularly useful. The tall side walls of both portions better protect the new filter as it is being installed and better contain the mess associated with removal of the spent filter. [0011] Consequently, in accordance with another aspect of the invention, methods for removing and installing filters may comprise opening a package containing a new filter in an enclosed space; removing a spent filter from a header; installing the new filter onto the header; and closing the package to contain the spent filter in the enclosed space.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S)

[0012] Figure 1 is an oblique view of a package containing a new filter; [0013] Figure 2 is a cross-sectional side view of the package shown in Figure 1; [0014] Figure 3 is a cross-sectional view of part of the package shown in Figure 2; [0015] Figure 4 is an oblique view of a portion of the package shown in Figure 1 attached to a new filter;

[0016] Figure 5 is an oblique view of another portion of the package shown in Figure 1 attached to a spent filter;

[0017] Figure 6 is an oblique view of the package of Figure 1 containing a spent filter;

[0018] Figure 7 is a cross sectional side view of another filter package containing a filter; and

[0019] Figure 8 is an oblique view of another filter package containing a filter.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] A filter package embodying the invention may be configured in a wide variety of ways. For example, the filter package may have a single piece construction or a multipiece construction including two, three, or more portions. One of many examples of a filter package 10 is shown in Figures 1 and 2, and the filter package 10 comprises at least two portions, e.g., an inner portion 11 and an outer portion 12. The inner portion 11 may be positioned on top of the outer portion 12, as shown in Figures 1 and 2, or below the outer portion. The inner and outer portions 11, 12 may be removably attached to one another to define an enclosed space 13, and the enclosed space 13 accommodates a filter 14, for example, a new filter or a spent filter. Any type of filter may be accommodated in the enclosed space, including, for example, a replaceable, disposable, cleanable, or reusable filter, and the filter may have any of a myriad of shapes and sizes. An enclosed space is a space that has no openings or ports that introduce or withdraw fluids from the space. A filter is a device that, in service, treats a fluid by separating one or more substances from the fluid or by concentrating one or more substances in the fluid. A new filter is a filter that has never been in service or a filter that has been in service but has been cleaned. A spent filter is a filter that is being removed from service and replaced by a new filter. Except for any wear and tear, the structure of the spent filter may be very similar to the structure of the new filter. [0021] The portions of the filter package may be configured in any of numerous ways. For many embodiments, the package portions may have a size and shape which closely conforms to the enclosed space 13, which, in turn, may have a size and shape which generally approximate the size and shape of the filter 14. For many embodiments, the package portions may have a size and shape which also closely conform to the filter 14. In the embodiment illustrated in Figures 1 and 2, the filter 14 has a generally cylindrical shape, and the enclosed space 13 is also generally cylindrical with a height and diameter similar to those of the filter 14. The inner portion 11 may comprise a generally cylindrical shell having a side wall 15, a closed end 20, and an open end 21. The inner diameter of the inner portion 11 may generally define the diameter of the enclosed space 13. The outer portion 12 may also comprise a generally cylindrical shell having a side wall 22, a closed end 23, and an open end 24. Much of the inner diameter of the outer portion 12 may be larger than but closely correspond to the outer diameter of the inner portion 11. While the cross section of each of the first and second portions 11, 12 of the illustrated filter package 10 is generally circular, the cross section may alternatively be polygonal, oval or irregularly shaped.

[0022] The heights of the side walls of the package portions may be the same or different. For example, the height of the side wall of one package portion, e.g., the outer portion, may be much greater than the height of the side wall of the other package portion, e.g., the inner portion. In the embodiment illustrated in Figures 1 and 2, the heights of the side walls 15, 22 of the inner and outer portions 11, 12 are generally about equal. Further, the height of the side wall of one package portion may be greater than, even much greater than, about 50% of the height of the enclosed space 13, while the height of the side wall of the other package portion may be less than, even much less than, about 50% of the height of the enclosed space 13. However, for many embodiments, including the embodiment illustrated in Figures 1 and 2, the heights of the side walls 15, 22 of both the inner and outer portions 11, 12 may be greater than about 50%, or greater than about 70%, or greater than about 80%, or greater than about 90%, of the height of the enclosed space 13. Taller side walls may be advantageous because they can fit axially along more of the filter, including, for example, much or all of the filter medium 28 of the filter, and, thus, may better protect a new filter and/or better contain the mess of a spent filter. For many embodiments, the side wall 15, 22 of the package portion 11, 12 may terminate prior to the connector 27 of the filter 14, allowing the filter connector 27 to protrude through the open end 21, 24 of the package portion 11, 12. The filter connector may be configured in any of numerous ways which provide a secure connection with a header or manifold (not shown). One of many examples is disclosed in the United States Provisional Application entitled Filter Elements and Assemblies which was filed on September 5, 2006, and listed Mark Milum as the sole inventor.

[0023] The portions of the filter package may be attached in a wide variety of ways. For many embodiments, the package portions may be removably attached by any of numerous releasable mechanical connections, including, for example, a snap-lock connection, an interference-fit connection, a latch mechanism, a twist-lock connection, or a threaded connection. For many embodiments, the portions of the package may be completely separate when they are detached from one another. For many embodiments, the package portions may be attached to one another in any manner which provides a leak-resistant seal between them and forms a leak-resistant enclosed space. A leak-resistant seal is any structural feature which at least retards, and may completely block, any leakage of a fluid in a spent filter from the enclosed space of the package. The leak-resistant seal may be implemented in various ways, including, for example, as a face seal or a close, tight fit between contacting surfaces of the package portions or the surfaces of the releasable mechanical connection. Alternatively, the leak-resistant seal may be implemented by an additional element, such as a gasket or ring seal, between the package portions.

[0024] In the embodiment illustrated in Figures 1 and 2, the inner and outer portions 11, 12 of the filter package 10 may be removably attached by a releasable mechanical connection comprising a plurality of mating, axially-spaced, circumferential ribs 25, 26, as shown in Figure 3, which extend around the outer periphery of the side wall 15 of the inner portion 11 and around the inner periphery of the side wall 22 of the outer portion 12. The ribs 25, 26 may each include two differently sloped shoulders 30, 31, 32, 33, one shoulder 31, 33 extending at a greater angle than the other shoulder 30, 32, to facilitate axial engagement of the inner and outer portions 11, 12 and to resist, but allow, axial disengagement of the inner and outer portions 11, 12 of the package 10. For many embodiments, the axial spacing between the ribs 25, 26 may be equal, allowing the height of the enclosed space 13 to be adjusted to accommodate filters of different heights. Fewer ribs 25, 26 may be engaged for taller filters and more ribs 25, 26 may be engaged for shorter filters. When the inner and outer portions 11, 12 of the filter package 10 are engaged with one another, the mating surfaces of the ribs 25, 26 of the inner and outer portions 11, 12 may be dimensioned to closely fit to one another and provide a leak-resistant seal that extends completely around the package 10 and forms a leak-resistant enclosed space. When the inner and outer portions 11, 12 of the filter package 10 are disengaged, the inner and outer portions 11, 12 may be entirely separate from one another.

[0025] For many embodiments, either one or both portions of the filter package may include a mechanical catch which is capable of releasably engaging a filter in the enclosed space. The mechanical catch may be arranged to resist but allow any one or more of longitudinal or axial movement, lateral or radial movement, or rotational movement between the filter and the package portion. The mechanical catch may be configured in a great variety of ways and may include structure only on the package portion or cooperating structures on both the package portion and the filter. For example, the mechanical catch may comprise one or more structures that protrude radially and/or axially inwardly from a portion of the filter package to mechanically engage the filter, e.g., the housing or an end cap of the filter, and resist but allow relative movement between the package portion and the filter. As another example, the mechanical catch may comprise one or more surfaces on a portion of the package that are dimensioned to closely fit against and frictionally engage a surface of the filter and resist but allow relative movement between the package portion and the filter. The mechanical catch may be located at a variety of locations along a portion of the filter package. For example, the mechanical catch may be located along the side wall of the package portion at any location between the open end and the closed end or at any location along the closed end of the package portion.

[0026] In the embodiment illustrated in Figures 1 and 2, a mechanical catch may be located on both the inner and outer portions 11, 12 of the filter package 10. For example, the mechanical catch may be located along the side wall 15, 22 near the closed end 20, 23 of the inner and outer portions 11, 12. The outer portion 12 of the filter package 10 may have a reduced diameter region 35 of the side wall 23 near the closed end 23, and the mechanical catch may be located in the reduced diameter region 35. Locating both mechanical catches at the same general location along the side walls 15, 22 allows both portions 11, 12 of the filter package 10 to interact with a filter in similar ways.

[0027] At least one of the mechanical catches on the inner and outer portions 11, 12 of the filter package 10 may be coupled to the filter 14 in the enclosed space 13 to resist relative movement between the filter 14 and the package 10. For example, only the mechanical catch in the reduced diameter region 35 of the outer portion 12 of the filter package 10 shown in Figures 1 and 2 is coupled to the filter 14, resisting relative axial and radial motion between the filter 14 and the outer portion 12. The mechanical catch of the inner portion 11 is not coupled to the filter 14, and the inner portion 11 may be removed from the outer portion 12 of the package 10 without disturbing the filter 14.

[0028] The mechanical catches of the inner and outer portions 11, 12 of the filter package 10 may be configured as a plurality of circumferentially aligned, angularly spaced protrusions which extend radially or axially inwardly into the enclosed space 13. For example, the protrusions may comprise a plurality of pips 40 in the outer periphery of the side walls 15, 22 of the inner and outer portions 11, 12 which protrude into the enclosed space 13 as generally hemispherical knobs 41, e.g., three pips 40 and corresponding knobs 41 spaced 120° apart. The knobs 41 may be dimensioned to releasably engage the filter 14. For example, the knobs 41 may be axially located in the side walls 15, 22 sufficiently beyond the closed ends 20, 23 of the inner and outer portions 11, 12 of the package 10 to allow an end cap 42 of the filter 14 to fit closely between the knobs 41 and the closed end 20, 23 of the inner or outer portion 11, 12. The knobs 41 may also extend radially sufficiently inwardly to overlie the end cap 42, preferably without contacting the filter medium 28 of the filter 14. The knobs 41 may thus mechanically and/or frictionally hold the filter 14 in the enclosed space 13 of the package 10 and resist relative axial movement, relative radial movement, and/or relative rotational movement between the filter 14 and the package 10. Alternatively, corresponding pips may also be located in the end cap of the filter and mated with the knobs of the mechanical catch, further resisting relative movement between the filter and the package. [0029] The portions of the filter package may be fashioned from the same or different materials. In the embodiment illustrated in Figures 1 and 2, both the inner and outer portions 11, 12 of the filter package 10 may be formed from the same generally impervious material. Further, the filter package may have sufficient structural integrity to maintain its form and leak-resistant seal as the inner and outer portions 11, 12 are detached and reattached and the new filter and the spent filter are moved in and out of the enclosed space 13. For example, both the inner and outer portions 11, 12 of the filter package 10 may be formed from an impervious paperboard, a metal, or a polymeric material. For many embodiments, the inner and outer portions 11, 12 are fashioned by various forming techniques from a polymeric material and the polymeric material may be sufficiently transparent or translucent to allow the filter in the enclosed space to be seen.

[0030] A filter may be easily positioned in a filter package embodying the invention. The filter package may be opened, for example, by forcing the inner portion 11 of the package 10 axially past the ribs 26 of the outer portion 12 and separating the inner portion 11 from the outer portion 12. The pips 40 in the inner and outer portions 11, 12 may serve as finger holds. The filter may then be inserted into the package and may be coupled to a mechanical catch. For example, the filter 14 may be inserted axially through the open end 24 of the outer portion 12, and the end cap 42 of the filter 14 may be moved axially past the knobs 41 and against the closed end 23 of the outer portion 12. The knobs 41 engage the end cap 42 and resist relative axial, radial, and/or rotational movement between the filter 14 and the outer portion 12 of the filter package 10. The package may then be closed to contain the filter in the enclosed space of the package. For example, the open end 21 of the inner portion 11 may be coaxially positioned over the open end 24 of the outer portion 12, and the inner portion 11 may be telescopically received over the filter 14 in the outer portion 12 of the package 10. The inner and outer portions 11, 12 may be axially forced along one another against the resistance of the ribs 25, 26 until the mating ribs 25, 26 engage one another, preferably as the enclosed ends 20, 23 of the inner and outer portions 11, 12 contact the opposite ends of the filter 14. The filter 14 is then contained in the leak-resistant enclosed space 13 of the filter package 10. Although the filter has been described as being initially situated in the outer portion of the package, the filter may alternatively be initially situated in the inner portion of the package and the outer portion may engage the inner portion to close the package. [0031] Filter packages may be used in a variety of methods for installing and/or removing filters. Methods for installing filters in accordance with the invention may be implemented in numerous ways. For example, the filter package 10, which is shown in Figures 1 and 2, may contain a new filter 14 and may be opened by axially forcing the inner portion 11 of the package 10 past the ribs 26 of the outer portion 12 and separating the inner portion 11 from the outer portion 12. The pips 40 of the inner and outer portions 11, 12 may serve as finger holds. The outer portion 12 then remains with the new filter 14, the side wall 22 of the outer portion 12 extending axially a considerable distance along the new filter 14, as shown in Figure 4. For example, the side wall 22 may extend axially along at least about 50% or at least about 75% or at least about 90% or about 100% of the height of the new filter 14 and/or the height of the filter medium 28 of the new filter 14. For many embodiments, the side wall 22 may terminate short of the filter connector 27, leaving the filter connector 27 exposed and free to engage a header (not shown).

[0032] Holding the outer portion 12 of the package 10, for example, the base of the side wall 22 near the end cap 42 of the filter 14, an operator may manipulate the connector 27 of the filter 14 into sealing engagement with the header. For example, while holding the outer portion 12, an operator may move the outer portion 12 of the package 10 and the filter 14 toward the header and then sealingly couple the filter connector 27, which may extend beyond the side wall 22 through the open end 24 of the outer portion 12, to the header by axial and/or rotational movement of the outer portion 12 of the package 10 and the filter 14. Because the package 10 rather than the new filter 14 is held by the operator as the filter 14 is installed on the header, the filter 14, including the filter medium 28, is protected from contact by the operator which may otherwise contaminate or damage the new filter 14. Because the side wall 22 of the outer portion 12 of the package 10 may extend axially along the new filter

14 a distance greater than at least 50% of the height of the enclosed space or greater than at least about 50% of the height of the filter 14 or the filter medium 28, the new filter 14, including much or all of the new filter medium 28, may be protected from contact with any structures that are near the header and would otherwise contaminate or damage, e.g., tear, the filter medium 28. Once the new filter 14 is sealingly mounted to the header, the outer portion 12 of the package 10 may be removed from the new filter 14. For example, the outer portion 12 may be pulled axially off the new filter 14, releasing the grip of the mechanical catch on the filter 14 by forcing the releasable catch, e.g., the knobs 41 in the reduced diameter region 35, past the end cap 42 of the filter 14.

[0033] Although the filter package has been described as having the outer portion coupled to the new filter and using the outer portion to install the new filter, the new filter may alternatively be coupled to the inner portion of the package and the inner portion may be used to install the new filter in an analogous manner. The height of the side wall of the inner portion may have the same relationship to the height of the new filter as the height of the side wall of the outer portion has.

[0034] Methods for removing filters in accordance with the invention may also be implemented in numerous ways. For example, the filter package 10, which is shown in Figures 1 and 2, may or may not contain a filter and may be opened by axially forcing the inner portion 11 of the package 10 past the ribs 26 of the outer portion 12 and separating the inner portion 11 from the outer portion 12. The pips 40 in the inner and outer portions 11, 12 may be used as finger holds. An operator may detach a spent filter from a header and place the spent filter in the inner portion 11 of the package 10. For example, the spent filter 14 may be inserted axially through the open end 21 of the inner portion 11, and the end cap 42 of the spent filter 14 may be moved axially past the knobs 41 and against the closed end 20 of the inner portion 11.

[0035] Alternatively, after the package 10 is opened, an operator may fit the inner portion 11 of the package 10 around the spent filter 14 while it is attached to the header, as shown in Figure 5. For example, the open end 21 of inner portion 11 may be coaxially aligned with the spent filter 14. The inner portion 11 may then be moved axially over the spent filter 14, e.g., until the filter 14 abuts the closed end 20 of the inner portion 11. The height of the side wall

15 of the inner portion 11 may be at least about 50% or at least about 75% or at least about 90% or about 100% of the height of the spent filter 14 and/or the height of the filter medium 28 of the spent filter 14. At least about 50% of the spent filter 14 may then be encased by the inner portion 11. For many embodiments, the side wall 15 may terminate short of the filter connector 27, leaving the filter connector 27 free to disengage from the header. The spent filter 14 may also engage a mechanical catch on the inner portion 11 of the package 10. For example, the knobs 41 in the inner portion 11 may move past the end cap 42 before the closed end 20 of the inner portion 11 abuts the spent filter 14. With the inner portion 11 of the package 10 mounted to the spent filter 14, the side wall 15 of the inner portion 11 extends a considerable distance along the spent filter 14.

[0036] Holding the inner portion 11 of the package 10, for example, the base of the side wall 15 near the end cap 42 of the spent filter 14, an operator may manipulate the filter connector 27 out of engagement with the header. For example, while holding the inner portion 11 of the package 10, an operator may disengage the filter connector 27 from the header by axial and/or rotational movement of the inner portion 11 and the spent filter 14 and then move the inner portion 11 and the spent filter 14 away from the header. Because the package 10 rather than the spent filter 14 is held by the operator, the operator is better protected from contact with the messy spent filter 14, especially the fluid-laden filter medium 28, and the fluids it contains, which may be toxic or noxious. Because the side wall 15 of the inner portion 11 may extend axially along the spent filter 14 a distance greater than at least 50% of the height of the enclosed space, spillage or leakage from the header or the spent filter 14, especially from the filter medium 28, is better contained in the inner portion 11 of the package 10.

[0037] Once the spent filter 14 is removed from the header and situated in the inner portion 11 of the package 10, the package 10 may be closed. For example, the open end 24 of the outer portion 12 may be positioned coaxially over the open end 21 of the inner portion 11, and the outer portion 12 may be telescopically slid along the inner portion 11. Sliding the outer portion 12 axially along the spent filter 14, the inner and outer portions 11, 12 may be axially forced along one another against the resistance of the ribs 25, 26 until the mating ribs 25, 26 engage one another, preferably as the closed ends 20, 23 of the inner and outer portions 11, 12 contact the opposite ends of the spent filter 14. The spent filter 14 is then contained in the leak-resistant enclosed space of the package 10. [0038] Although the filter package has been described as having the outer portion coupled to the spent filter and using the outer portion to remove the spent filter, the spent filter may alternatively be coupled to the inner portion and the inner portion may be used to remove the spent filter in an analogous manner. The height of the side wall of the outer portion may have the same relationship to the height of the spent filter as the height of the side wall of the inner portion has.

[0039] Methods for installing and removing filters in accordance with the invention may also be implemented in numerous ways. For example, the filter package 10, which is shown in Figures 1 and 2, may contain a new filter enclosed in a leak-resistant enclosed space 13. The package 10 may be opened, for example, by axially forcing the inner portion 11 of the package 10 past the ribs 26 of the outer portion 12 and separating the inner portion 12 from the outer portion 12. An operator may remove a spent filter from a header, either with or without the assistance of the inner portion 11, as previously explained. The operator may then install the new filter onto the header, either with the assistance of the outer portion 12, as previously explained, or without the assistance of the outer portion 12. With the spent filter situated in the inner portion 11, the package 10 may then be closed, for example, by telescopically sliding the outer portion 12 along the inner portion 11 as previously explained. The spent filter, and the mess associated with a spent filter, is then contained in the leak- resistant enclosed space 13 of the filter package 10.

[0040] While various aspects of the invention have been described and illustrated with respect to the embodiments of the filter packages and methods previously disclosed and shown in Figures 1-6, the invention is not limited to these embodiments. Variations of these embodiments which are nonetheless within the scope of the invention may become apparent to those skilled in the art upon reading this description.

[0041] For example, a filter package 50, as shown in Figure 7, may be similar to the filter package 10 shown in Figures 1 and 2. In particular, many features of the filter package 50 shown in Figure 7 may be similar or identical to the features of the filter package 10 shown in Figures 1 and 2 and corresponding features have identical reference numbers. The filter package 50 shown in Figure 7 includes inner and outer portions 11, 12 that are removably attached to one another to define a leak-resistant enclosed space 13 which accommodates a filter 14, e.g., a new filter or a spent filter. The inner portion 11 may have a generally cylindrical side wall 15, a closed end 20 and an open end 21. The side wall 15 of the inner portion 11 may have a height greater than 50% of the height of the enclosed space 13. The outer portion 12 may also have a generally cylindrical side wall 22, a closed end 23, and an open end 24. However, the side wall 22 of the outer portion 12 may have a height less than 50% of the height of the enclosed space 13.

[0042] Further, both the inner portion 11 and the outer portion 12 of the filter package 50 may not include a mechanical catch. Instead, either one or both of the inner and outer portions 11, 12 may include a collapsible region 51 configured to collapse against and grip a filter contained in the enclosed space 13. For example, the collapsible region 51 may be located along the side wall 22 of the outer portion 12 opposite a more robust component of the filter 14, such as an end cap 42 or a housing. In the illustrated embodiment, the collapsible region 51 may be located in the reduced-diameter region 35 of the outer portion 12 and may be formed from a thinner, impervious wall. The remainder of the package portion 12 may have a wall thickness which resists collapse. The outer portion 12, including the collapsible region 51, may have sufficient structural integrity to maintain its form without a filter in the enclosed space 13. However, the thinner walled collapsible region 51 is capable of collapsing or flexing inwardly against a filter 14 in the enclosed space 13, without breaking or cracking when an operator squeezes the collapsible region 51. This allows the operator to grip and manipulate the filter 14 through the outer portion 12 without relative movement between the outer portion 12 and the filter. The inner portion 11 may similarly include a collapsible region 51, for example, in the side wall 15 near the closed end 20, and one or both of the inner and outer portions may include a mechanical catch in addition to the collapsible region.

[0043] The filter package 50 shown in Figure 7 may be used in methods for installing and/or removing filters in virtually the same way the filter package 10 shown in Figures 1 and 2 may be used. For example, the filter package 50 containing a new filter in the enclosed space 13 may be opened by separating the inner portion 11 from the outer portion 12, as previously explained. An operator may then remove a spent filter from a header using the inner portion 11 or the outer portion 12 of the package 50 in a manner similar to that previously explained. For example, the operator may slide the inner portion 11 along the spent filter while it is attached to the header until the closed end 20 of the inner portion 11 abuts the filter. The operator may then squeeze the collapsible region 51 of the inner portion 11 to grip the spent filter through the inner portion 11 and manipulate the filter connector of the spent filter out of engagement with the header. The inner portion 11 of the package 50 and the spent filter may then be moved away from the header. With the inner portion 11 of the package 50 surrounding the spent filter, spillage and leakage of fluid from the header and the spent filter may be contained in the inner portion 11 and the operator may be protected from contamination by the fluid.

[0044] An operator may install a new filter onto the header using the outer portion 12 of the package 50 in a manner similar to that previously described. For example, with a new filter resting on the closed end 23 of the outer portion 12, the operator may squeeze the collapsible region 51 of the outer portion 12 to grip the new filter through the outer portion 12. The outer portion 12 and the new filter may then be moved toward the header and the filter connector of the new filter may be manipulated into sealing engagement with the header. With the outer portion 12 surrounding the new filter, the new filter, including the new filter medium, may be protected from contamination and damage as it is being installed. [0045] The filter package 50 may be closed to contain the spent filter 14 in the enclosed space 13. For example, the operator may position the open end 24 of the outer portion 12 coaxially over the open end 21 of the inner portion 11 which holds the spent filter. The operator may then telescopically slide the outer portion 12 axially over the inner portion 11 until the mating ribs 25, 26 engage, as previously explained, containing the spent filter 14 and the mess associated with the spent filter in the leak-resistant enclosed space 13. [0046] Variations in the methods for installing and/or removing filters may also involve a filter package 60 in the form of a recloseable or resealable polymeric bag 61, such as a plastic zip bag, as shown in Figure 8, which may be taller than the filter 14. The filter package 60 may include two portions, e.g., opposite sides of the bag, removably attached by a resealable closure 61, such as a zipper, to form a leak-resistant enclosed space 13 that accommodates the filter 14.

[0047] The filter package 60 shown in Figure 8 may be used in methods for installing and/or removing filters in a manner similar to those described with respect to the filter packages 10, 50 shown in Figures 1, 2, and 7. For example, the filter package 60 shown in Figure 8 may contain a new filter 14 with the filter connector 27 near the resealable closure 61. The filter package 60 may be opened by opening the resealable closure 61, e.g., by unzipping the zipper of the polymeric bag. An operator may remove a spent filter from a header and set it aside. With the new filter 14 in the filter package 60, the operator may grasp the filter package 60 and grip the new filter 14 through the filter package 60, for example, by squeezing the polymeric bag against the new filter 14. Holding the filter package 60 and the new filter 14, the operator may move them toward the header and manipulate the filter connector 27 of the new filter 14 into sealing engagement with the header. With the filter package 60 surrounding the new filter 14, the new filter 14, including the new filter medium 28, may be protected from contamination and damage as it is being installed. After the new filter 14 is installed, the filter package 60 may then be slipped off of the new filter 14. The operator may then place the spent filter 14 in the filter package 60. The filter package 60 may be closed by closing the resealable closure 61, e.g., zipping the zipper of the polymeric bag, to contain the spent filter 14, and all of the mess associated with the spent filter, in the leak-resistant enclosed space 13 of the filter package 60.

[0048] Alternatively, after the filter package 60 is opened, the new filter 14 may be removed from the filter package 60 and set aside. An operator may then position the unzipped open end of the filter package 60 around the spent filter 14 while the spent filter 14 is engaged to the header and slip the filter package 60 axially along the spent filter 14, encasing much of the spent filter 14 with the filter package 60. The operator may then grasp the filter package 60 and grip the spent filter 14 through the filter package 60, for example, by squeezing the polymeric bag against the spent filter 14. Holding the filter package 60 and the spent filter 14, the operator may manipulate the filter connector 27 of the spent filter 14 out of engagement with the header and move the filter package 60 and the spent filter 14 away from the header. With the filter package 60 surrounding the spent filter, spillage and leakage of fluid from the header and the spent filter 14 may be contained by the filter package 60 and the operator may be protected from contamination by the fluid. The filter package 60 may then be closed by closing the resealable closure 61, e.g., by zipping the zipper, to contain the spent filter 14 and the mess associated with the spent filter in the leak-resistant enclosed space 13 of the filter package 60. After the spent filter is removed from the header, the new filter may be installed onto the header.

[0049] The invention thus includes all variations, modifications, and equivalents of the subject matter recited in the attached claims.

[0050] The use of the terms "a" and "an" and "the" and similar referents in the context of describing the invention (especially in the context of the following claims) are to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by context. The terms "comprising," "having," and "including" are to be construed as open-ended terms (i.e., meaning "including, but not limited to,") unless otherwise noted. Recitation of ranges of values herein are merely intended to serve as a shorthand method of referring individually to each separate value falling within the range, unless otherwise indicated herein, and each separate value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g., "such as") provided herein, is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention unless otherwise claimed. No language in the specification should be construed as indicating any non-claimed element as essential to the practice of the invention.

Claims

CLAIM(S):

1. A package for a filter comprising a first portion and a second portion removably attached to the first portion to define an enclosed space which accommodates a filter, wherein at least one of the first portion and the second portion includes a mechanical catch configured to releasably engage a filter.

2. The filter package of claim 1 wherein the second portion is completely separable from the first portion.

3. The filter package of claim 1 or 2 wherein the mechanical catch comprises a first mechanical catch operatively associated with the first portion, the filter package further comprising a second mechanical catch operatively associated with the second portion.

4. The filter package of any preceding claim wherein the mechanical catch includes a plurality of inwardly directed structures which are capable of mechanically and/or frictionally engaging a filter in the package.

5. The filter package of claim 4 wherein the structures include a plurality of circumferentially aligned, angularly spaced knobs.

6. A package for a filter comprising a first portion and a second portion removably attached to the second portion to define an enclosed space which accommodates a filter, wherein the second portion is completely separable from the first portion to open the package and is reattachable to the first portion to reestablish the enclosed space and wherein at least one of the first portion and the second portion includes a collapsible region configured to collapse against and grip a filter.

7. The filter package of claim 6 wherein the collapsible region comprises a first collapsible region operatively associated with the first portion, the filter package further comprising a second collapsible region operatively associated with the second portion.

8. The filter package of claim 6 or 7 wherein the collapsible region has a thinner wall than the remainder of the package portion, the remainder of the package portion resisting collapse.

9. The filter package of any of claims 6-8 wherein one or both of the first and second portions have a side wall and the collapsible region is located in the side wall.

10. The filter package of any of claims 1-8 wherein each of the first and second portions have a side wall, a closed end, and an open end.

11. The filter package of claim 10 wherein the enclosed space has a height and the side walls of the first and second portions each have a height greater than 50% of the height of the enclosed space.

12. A package for a filter comprising a first portion having a side wall, a closed end, and an open end and a second portion having a side wall, a closed end, and an open end, wherein the first and second portions are removably attached to one another to define an enclosed space having a height, and wherein the side wall of the first portion and the side wall of the second portion each have a height greater than 50% of the height of the enclosed space.

13. The filter package of claim 12 wherein the second portion is completely separable from the first portion.

14. The filter package of any of claims 11-13 wherein the height of the each side wall is greater than about 70% of the height of the enclosed space.

15. The filter package of any preceding claim wherein the first and second portions each have a generally cylindrical configuration.

16. The filter package of any preceding claim wherein the first and second portions are telescopically mountable to one another.

17. The filter package of any preceding claim further comprising a releasable mechanical connection that removably attaches the first and second portions.

18. The filter package of claim 17 wherein the releasable mechanical connection includes at least one rib on each of the first and second portions, the rib of the first portion engaging the rib of the second portion.

19. The filter package of claim 17 or 18 wherein the releasable mechanical connection includes a plurality of circumferentially extending, axially spaced ribs on each of the first and second portions, the ribs of the first portion engaging the ribs of the second portion.

20. The filter package of any preceding claim further comprising a leak-resistant seal which resists leakage from the enclosed space.

21. The filter package of claim 20 wherein the leak-resistant seal is arranged between the first and second portions.

22. The filter package of claim 20 or 21 wherein the leak resistant seal comprises a close fit between contacting surfaces of the first and second portions.

23. The filter package of any preceding claim wherein the first portion comprises an inner portion and the second portion comprises an outer portion.

24. A method for installing a filter comprising: opening a package containing a filter; holding at least a portion of the package which remains with the filter to manipulate the filter into engagement with a header; and removing the remaining portion of the package from the engaged filter.

25. The method of claim 24 wherein opening the package includes completely separating first and second portions of the package, the filter remaining with the second portion.

26. The method of claim 25 wherein separating first and second portions includes telescopically detaching an inner portion from an outer portion of the package.

27. The method of any of claims 24-26 wherein holding at least a portion of the package includes holding a portion of the package which extends axially along at least about 50% of the filter.

28. The method of any of claims 24-27 wherein holding at least a portion of the package to manipulate the filter into engagement with a header includes moving the package portion and the filter axially.

29. The method of any of claims 24-28 wherein holding at least a portion of the package to manipulate the filter into engagement with a header includes moving the package portion and the filter rotationally.

30. The method of any of claims 24-29 wherein removing the package portion from the engaged filter includes detaching the filter from a mechanical catch on the package portion.

31. The method of claim 24 wherein opening the package includes opening a resealable closure of a polymeric bag.

32. The method of claim 31 wherein opening the resealable closure includes unzipping the bag.

33. The method of claim 24, 31, or 32 wherein holding at least a portion of the package includes holding the polymeric bag.

34. A method for removing a spent filter comprising: opening a package; fitting at least a portion of the package around a spent filter attached to a header; and holding the package portion to manipulate the spent filter out of engagement with the header.

35. The method of claim 34 wherein opening the package includes completely separating first and second portions of the package.

36. The method of claim 35 wherein separating first and second portions includes detaching an inner portion and an outer portion from one another.

37. The method of any of claims 34-36 wherein fitting a portion of the package around a spent filter includes axially moving a first portion of the package axially along the spent filter.

38. The method of any of claims 34-37 wherein fitting a portion of the package around a spent filter includes encasing the spent filter by a first portion of the package along at least 50% of the height of the spent filter.

39. The method of any of claims 34-38 wherein fitting a portion of the package around a spent filter includes engaging the spent filter and a mechanical catch on the package portion.

40. The method of any of claims 34-39 wherein holding the package portion to manipulate the spent filter includes axially moving the package portion and the spent filter.

41. The method of any of claims 34-40 wherein holding the package portion to manipulate the spent filter includes rotating the package portion and the spent filter.

42. The method of any of claims 34-41 wherein holding the package portion includes collapsing a region of the package portion against the spent filter.

43. The method of any of claims 34-42 further comprising attaching first and second portions of the filter package to contain the spent filter within a leak-resistant enclosed space of the filter package.

44. The method of claim 43 wherein attaching first and second portions includes telescopically mounting inner and outer portions of the filter package to one another.

45. The method of claim 34 wherein opening the package includes opening a resealable closure on a polymeric bag.

46. The method of claim 45 wherein opening the resealable closure includes unzipping the polymeric bag.

47. The method of claim 34, 45 or 46 wherein fitting at least a portion of the package around a spent filter includes axially moving the polymeric bag along the spent filter.

48. The method of any of claims 34 and 45-47 wherein holding the package includes squeezing the polymeric bag against the spent filter.

49. The method of any of claims 34 and 45-48 further comprising closing the resealable closure to contain the spent filter in a leak-resistant enclosed space.

50. A method for removing and installing filters comprising: opening a package containing a new filter in an enclosed space; removing a spent filter from a header; installing the new filter onto the header; and closing the package to contain the spent filter in the enclosed space.

51. The method of claim 50 wherein opening the package includes completely separating first and second portions of the package, the new filter remaining with the second portion.

52. The method of claim 51 wherein separating the first and second portions includes telescopically removing an inner portion and an outer portion from one another.

53. The method of claim 51 or 52 wherein removing the spent filter includes fitting the first portion of the package to the spent filter.

54. The method of claim 53 further comprising holding the first portion of the package to manipulate the spent filter out of engagement with the header.

55. The method of any of claims 51-54 wherein installing the new filter includes holding the second portion of the package to manipulate the new filter into engagement with the header.

56. The method of 51-55 further comprising removing the second portion of the package from the new filter and attaching the first and second portions of the package to contain the spent filter in a leak resistant enclosed space in the package.

57. The method of claim 50 wherein opening the package includes opening a resealable closure on a polymeric bag.

58. The method of claim 57 wherein removing the spent filter includes removing the new filter from the polymeric bag, fitting the polymeric bag around the spent filter, and squeezing the polymeric bag against the spent filter and manipulating the spent filter out of engagement with the header.

59. The method of claim 58 wherein closing the package includes closing the resealable closure.

60. The method of claim 57 wherein installing the new filter includes squeezing the polymeric bag against the new filter and manipulating the new filter into engagement with the header and removing the polymeric bag from the new filter.

61. The method of any of claims 57-60 wherein opening or closing the resealable closure includes unzipping or zipping the polymeric bag.

62. A package assembly comprising: a filter package including a recloseable polymeric bag having a resealable closure which defines an enclosed space and a filter contained within the enclosed space.

63. The package assembly of claim 62 wherein the resealable closure includes a zipper.

64. The package assembly of claim 62 or 63 wherein the filter comprises a new filter.

65. The package assembly of claim 62 or 63 wherein the filter comprises a spent filter.