US2750048A - Lubricant filter - Google Patents

Description

ni- A" June 12, 1956 J, M HILBISH 2,750,048

` LUBRICANT FILTER Filed April 16, 1953 9 l. Z ,l1-wl.

2Q ZZZ i Z J3 United States,Y Patent O LUBRICANT FILTER Joseph M. Hilbish, Ashville, N. Y.

Application April 16, 1953, Serial No. 349,190

3 Claims. (Cl. ZIO- 183) This invention relates generally to filters for internal combustion engines and more particularly to an improved manner of mounting a replaceable lter pack within a casing.

The oil filter on the present day automobile consists of a metal casing within which a cartridge is seated. All or portions of the oil circulating through the lubricant system is required to pass through the cartridge before being returned to the oil reservoir for recirculation. An ordinary roll of toilet tissue has been employed asa cartridge in such filters and the oil is circulated through the full length of the roll which is mounted between fixed seats in the casing. Although the ordinary roll of toilet paper provides a considerable amount of filtering surface and an excellent absorbent, it is not sufficiently dense to remove a proper proportion of the foreign material from the oil that it is capable of removing owing to the fact that the leaves of a roll of this character of tissue is too loosely wound.

In order to overcome this deficiency, it is the principal object of this invention to provide an expansion means for the purpose of expanding the core of the roll so that the paper may be compressed against the side walls of the container and produces a filter that will take out minute foreign particles circulating therethrough. By compressing the whole roll radially from the core outwardly in all directions against the casing, a materially improved filter is obtained. To obtain these advantages, it is necessary to provide a casing in which the ordinary toilet paper roll may be readily inserted Without providing anymore clearance than necessary between the perimetral surface of the roll and the inner cylindrical wall of the casing. A grid may be placed in the bottom to allow for the unrestricted flow of the oil passing through the roll. An expanding member, preferably frusto conical in shape, is inserted in the core for the purpose of breaking the central paper tube and permitting the paper roll to be compressed against the sides of the casing by pressure equal in all directions. This conical expansion member also closes the core and is held in position by a spring which is compressed against the under side of the lid of the casing. The spring provides constant pressure when the cover or lid is mounted on the casing to maintain the conical expander in place and the tissue paper roll properly seated. The oil inlet extends through the side of the casing above the paper roll and its upper end is wholly exposed to the oil supplied to the casing. The oil outlet is at the bottom of the casing, the oil being collected from under a grid on which the lower end of the paper roll rests. Thus both ends of the paper roll are fully exposed while functioning as a filtering cartridge unit and the spring continually exerts pressure to maintain expansion of the roll against the side of the casing and also maintain the roll seated on the grid. In this manner a density to the roll of tissue is maintained for properly filtering the oil passing therethrough.

The cover for the casing may be held by an upwardly e t 1C@ extending stud secured to the bottom of the casing and passing upwardly through the lid and being provided with threads to receive a wing nut for holding the lid in place and for exerting pressure on the spring. Again the lid may be provided with threads to secure it with cornplementary threads on the casing for the purpose of holding the lid in place and providing pressure against the spring to hold the tissue roll seated and expanded against the casing wall.

Other objects and advantages appear hereinafter in the following description and claims.

The accompanying drawings show for the purpose of exemplilication without limiting the invention or claims thereto, certain practical embodiments illustrating the principles of the invention wherein:

Fig. l is a view in vertical section illustrating this invention. v A

Fig. 2 is a view in horizontal section taken on the line of 2-2 of Fig. l showing the grid upon which the paper roll is seated.

Fig. '3 is a perspective view of the wedge member as shown in Fig. l.

Referring to the drawings, 1 represents the casing which is supported by a circular clamping band 2 that is pro vided with an opening 3 for receiving a mounting bolt for the purpose of clamping the same to the vehicle. The band 2 may be welded or otherwise permanently secured to the casing but capable of flexing for mounting. The casing provides a chamber 4 having at the lower end a grid member 5 as illustrated in Fig. 2, which is provided with a series of radially disposed land members 6. The grid member S is seated on the arcuate portion 7 of the bottom 8 of the casing allowing thereunder a free space 10 through which to drain the oil to the outlet 11. The inner ends of the radial land members 6 of the grid 5 are provided with depending feet 12 that support the inner diameter of the grid 5 from the bottom 3 of the casing 1. The casing may be made of a metal such as steel or it may be made of plastic. The grid 5' may likewise be made of plastic and the lands thereof provide a surface 13 on which the roll of tissue 14 rests. The tissue roll is an ordinary roll of toilet paper and is provided with a paper core member 1S which has been split by the conical expanding member 16 which has been driven a considerable way into the paper core 15 causing the tissue roll to be expanded for one-half to three' fourths of its length against the inner perimetral wall surface of the casing 1. The conical expanding member 16 being larger at the top, expands the upper end of the tissue roll to greater degree than the intermediate or lower portion of the roll. This catches the heavy as well as the fine particles at the top of the roll and most of the heavy particles cannot even enter the tissue roll. The conical expanding member is provided with an inner bearing section 17 that slides over the central clamping bolt 18. The upper end of the expanding member is dished out as indicated at 2i) and is provided with a at seat 21 to receive the sealing Washer 22. The washer 22 seals the bore of the sleeve 17 with the bolt 18 and is held in place by the seating of the lower end of the helical spring 23 thereon. The upwardly open chamber 20 of the expanding member may be vented by the openings 24.

The upper end of the helical spring 23 engages in the seat 2S in the underside of the lid 216 of the casing and bears against the second sealing washer 27 positioned in the seat 2S. Bolt 18 extends up through the lid 26 and is threaded to receive the wing nut 28 for the purpose of clamping the lid member 26 to the casing 1. An annular seal 30 is provided to engage the upper edge of the casing 1 for the purpose of sealing the lid. Thus the casing is properly sealed to function as a pressure vessel and the oil delivered thereto through the pipe and inlet connection 31 is free to flow over the whole of the top surface of the roll as indicated at 32. The expansion member 16 being impervious to roll does not allow any oil to pass down through the central portion of the roll and the oil is forced to flow through the tissue roll in its compressed condition against the sides of the casing. This permits the use of an ordinary tissue roll and increases its filtering characteristics materially over the condition which would be normally present when no compression is placed on the roll forcing it radially against the intcrperinietral surface of the casing 1.

The conical expanding member 16 is provided with knife edges as indieated'at 3:3 and 34 on opposite sides thereof adjacent the small diameter. As shown in Fig. l these knife edges slit the inner heavy paper core i5 causing it to open and permit the tissue roll to 'ne more uniformly expanded against the inner wall of the chamber.

While for clarity of explanation, certain embodiments of this invention have been shown and described, it is to be understood that this invention is capable of many modifications and changes in the construction and arrangement of. parts and certain parts and steps may be employed without the conjoint use of other parts and steps and without departing from the spirit and scope of this invention.

claim:

l. An oil tlter comprising a cylindrical casing closed at one end and provided with an oil discharge, a tissue roll having a central opening, a seat on the inner surface a of said closed casing end to receive and support one end of said tissue roll Without blocking or interfering with the flow of oil axially between the leaves making up the tissue roll to said discharge, a cover closing the other end of said casing to seal the same, an oil inlet in said casing above said tissue roll, and a frusto conical pressure plug member closing and seated in one end of the central opening of. said tissue roll, spring means seated on said frusto conical pressure member to constantly force the latter into the central opening and expand the tissue roll radially laterally against the inner surface of the casing to the extent of its insertion thereinto.

2. The structure of claim l characterized in that said spring means is compressed between the cover and said frusto conical pressure plug member.

3. The structure of claim l which also includes knife means on said frusto conical pressure member to slit the central opening of the tissue roll to aid the spring means acting vthrough the frusto conical pressure member in forcing the roll radially against the inner surface of the casing.

References Cited in the le of this patent UNITED STATES PATENTS 1,249,724 Davis V Dec. ll, i917 1,753,809 Short Apr. 8, 1930 2,072,393 Briggs Mar. 2, 1937 2,086,739 Reed July i3, i937 2,128,589 Manning Aug. 30, 1938 2,168,125 Hum Aug. l, i939

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