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WO2018032038A1 - Lubrication pump - Google Patents

Lubrication pump Download PDF

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Publication number
WO2018032038A1
WO2018032038A1 PCT/AU2017/050806 AU2017050806W WO2018032038A1 WO 2018032038 A1 WO2018032038 A1 WO 2018032038A1 AU 2017050806 W AU2017050806 W AU 2017050806W WO 2018032038 A1 WO2018032038 A1 WO 2018032038A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
rotary
pumping device
lubrication
anyone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/AU2017/050806
Other languages
French (fr)
Inventor
Graham Richard METTEN
Andrew Derek SELLEY
Peter DOOLAN
Bruce Carter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Coventry Group Ltd
Original Assignee
Coventry Group Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2016903230A external-priority patent/AU2016903230A0/en
Application filed by Coventry Group Ltd filed Critical Coventry Group Ltd
Publication of WO2018032038A1 publication Critical patent/WO2018032038A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C5/00—Rotary-piston machines or pumps with the working-chamber walls at least partly resiliently deformable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/005—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of dissimilar working principle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N13/00—Lubricating-pumps
    • F16N13/20—Rotary pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/126—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/14—Lubricant

Definitions

  • the present invention generally relates to a lubrication pump.
  • Rotary pumps are conventionally required to move at high speeds and can be poor at transporting highly viscous fluids in a single stage.
  • the present invention seeks to provide a lubrication pump for highly viscous fluids including:
  • an elongate housing arranged to be at least partially submerged in the highly viscous fluid
  • a drive mechanism to drive the first and second rotary pumping devices.
  • the first rotary pumping device operates as a first stage pump and the second rotary pumping device acts as a second stage rotary pump;
  • first stage pump feeds highly viscous fluid to the second stage pump; and wherein the second stage pump is arranges to discharge the highly viscous fluid consistently.
  • the first rotary pumping device includes an impeller to pump the highly viscous fluid from a reservoir.
  • the impeller includes flexible vanes and a cam, wherein the cam is arranged to deform the flexible vanes for pumping.
  • the second rotary pumping device is a gear pump.
  • the gear pump is an external gear pump.
  • the drive mechanism is selected from one of the following:
  • the second rotary pump is directly driven by the drive mechanism.
  • the second rotary pump transfers rotational motion to a drive shaft that drives the first rotary pump.
  • the first rotary pump is located at the end of the elongate housing distal the drive mechanism.
  • the second rotary pump is adapted to balance the output of the second rotary pump to the output of the first rotary pump.
  • Figure 2 is a side view of the pump of Figure 1 ;
  • Figure 3 is a side view of a housing and impeller for the pump of Figure 1 ;
  • Figure 4 is a perspective view of an impeller and cam for a first stage of the pump of Figure 1 ;
  • Figure 5 is a perspective view of a secondary stage of the pump of Figure 1 ;
  • Figure 6 is a perspective view of the secondary stage of Figure 5 showing the internal components.
  • the present invention relates to a lubrication pump 1 1 for pumping highly viscous lubricant, such as grease, that provides consistent flow regardless of the output pressure of the pump.
  • the present invention provides a lubrication pump 1 1 including a drive mechanism 17 in the form of a drive motor, a leg extension 12 extending away from the drive mechanism 17 and a first rotary pumping device 13 attached to the leg extension 12 distal the drive mechanism 17 and a second rotary pumping 15 device adjacent the drive mechanism.
  • a drive shaft 14 is powered by the drive mechanism 17 and powers the first and second pump devices 13, 15.
  • the drive mechanism 17 is a motor.
  • the skilled addressee will recognize that this could be a hydraulic motor, pneumatic motor, electric motor (either brushless or with brushes) or otherwise.
  • the first rotary pumping device 13 is located at the end of the leg extension distal the drive mechanism 17 and is arranged to be submerged in the highly viscous lubricant to draw in the highly viscous fluid through inlet 10.
  • the first rotary pumping device 13 is a low pressure rotary pump and the second rotary pumping device 15 is a high pressure pumping device.
  • the first rotary pumping device 13 includes a base insert 19 that serves to define the inlet 10 into the first rotary pumping device 13. From the inlet 10, the high viscous lubricant is drawn into the first rotary pumping mechanism through inlet plate 21 by impellers 23. The impellers 23 then pass the high viscous fluid through the outlet plate 25 and up into the leg extension 12 around the drive shaft 14.
  • the impeller 23 includes a central bore 24 into which the drive shaft 14 is inserted to act as a spindle.
  • Yielding vanes 29 extend from the bore 24 to draw the highly viscous fluid into the first rotary pumping device 13 and the pump the highly viscous fluid out of the first rotary pumping device 13.
  • Primary cam 27 is spaced apart from the yielding vanes 29 and causes the yielding vanes 29 to deform and assist with the pumping intake and outlet of the impeller 23 of the first rotary pumping mechanism 13.
  • the first rotary pumping device 13 can use a fixed elastomer stator with a rotating helical screw or another spindle driven pumping mechanism in place of the yielding vanes 29 and cam 27 such as a progressive cavity stator and rotor.
  • the drive shaft 14 also powers the second rotary pump device 15.
  • the high viscous fluid pumped by the first rotary pumping device 13 is drawn into the second rotary pump device 15 at the low pressure side and then transferred to the high pressure output side of the second rotary pumping device and discharged at high pressure.
  • the second rotary pumping device 15 is a gear type pump including in a casing with wall section 33 base 39 and top 35.
  • the base sits on or in the leg 12 and includes a connection (not shown) to drive the drive shaft 14 that extends to and powers the first rotary pumping device 13.
  • the top 35 of the second rotary pumping device 15 connects to the drive mechanism 17.
  • a drive shaft 27 connects to a female connection in the drive mechanism to power the second rotary pumping device 15.
  • gear pump 42 Connecting the top 25 to the base 39, transferring rotational motion from the drive shaft 27 to the connection in the base and providing the pumping mechanism for the second rotary pumping device 15 is gear pump 42 in housing 41 .
  • the drive shaft powers driving gear 44 which in turn powers driven gear 43 causing gear pumping action to provide high pressure lubricant expression through outlet 31 to be applied to for lubrication.
  • the gear pump 42 is arranged to balance the output of the second rotary pumping device to match the output of the first rotary pumping device.
  • the top 35 may include a female connection arranged to receive a male drive shaft of the drive mechanism to power the second rotary pumping device 15.
  • the second rotating pumping device 15 can be other types of fixed displacement pump such as an internal gear pump, lobe pump, piston pump or otherwise that can be driven by a spindle and transfer rotational motion to drive shaft 27.
  • the housing of the second rotary pumping device 15 can include valves such as check valves, relief valves, dump valves etc., to assist with the lubrication system.
  • the leg 12 can be of a variety of lengths and can include a strainer to minimize the risk of the highly viscous lubricant being contaminated and damaging the rotary pumping devices 13, 15.
  • the drive mechanism 17 can include flow and pressure controls. Where the drive mechanism 17 is an electric motor, the drive mechanism can include over current and reverse polarity protection and other control features.
  • the lubrication pump 1 1 of the present invention provides consistent flow rates and capacity for systems that require large, consistent lubrication without pressure of flow drops.
  • the lubrication pump also allows scalability in its principles, offers reliability and efficiency currently not available in high volume pumps for high viscous fluids. Variations and Modifications

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

A lubrication pump for highly viscous fluids including: an elongate housing arranged to be at least partially submerged in the highly viscous fluid; a first rotary pumping device; a second rotary pumping device; and a drive mechanism to drive the first and second rotary pumping devices.

Description

LUBRICATION PUMP
Technical Field
[0001 ] The present invention generally relates to a lubrication pump. Background Art
[0002] Pumps for large lubrication systems commonly do not have sufficient capacity to charge the large lube systems that they are a part of. This often leads to system alarms and down time, requiring skilled man power and causing lost income.
[0003] Current systems typically use reciprocating pumps that result in large falls in output flow as pressure increases making predictability of output difficult to gauge. This is at least partially due to the pulsating nature of flow in a reciprocating pump and is unavoidable.
[0004] Rotary pumps are conventionally required to move at high speeds and can be poor at transporting highly viscous fluids in a single stage.
[0005] Reference to cited material or information contained in the text should not be understood as a concession that the material or information was part of the common general knowledge or was known in Australia or any other country.
Summary of the Invention
[0006] The present invention seeks to provide a lubrication pump for highly viscous fluids including:
an elongate housing arranged to be at least partially submerged in the highly viscous fluid;
a first rotary pumping device;
a second rotary pumping device; and
a drive mechanism to drive the first and second rotary pumping devices.
[0007] Preferably, the first rotary pumping device operates as a first stage pump and the second rotary pumping device acts as a second stage rotary pump;
wherein the first stage pump feeds highly viscous fluid to the second stage pump; and wherein the second stage pump is arranges to discharge the highly viscous fluid consistently.
[0008] Preferably, the first rotary pumping device includes an impeller to pump the highly viscous fluid from a reservoir.
[0009] Preferably, the impeller includes flexible vanes and a cam, wherein the cam is arranged to deform the flexible vanes for pumping.
[0010] Preferably, the second rotary pumping device is a gear pump.
[001 1 ] Preferably, the gear pump is an external gear pump.
[0012] Preferably, the drive mechanism is selected from one of the following:
a hydraulic motor;
an electric motor; or
a pneumatic motor.
[0013] Preferably the second rotary pump is directly driven by the drive mechanism.
[0014] Preferably the second rotary pump transfers rotational motion to a drive shaft that drives the first rotary pump.
[0015] Preferably, the first rotary pump is located at the end of the elongate housing distal the drive mechanism.
[0016] Preferably the second rotary pump is adapted to balance the output of the second rotary pump to the output of the first rotary pump.
Brief Description of the Drawings
[0017] Further features of the present invention are more fully described in the following description of several non-limiting embodiments thereof. This description is included solely for the purposes of exemplifying the present invention. It should not be understood as a restriction on the broad summary, disclosure or description of the invention as set out above. The description will be made with reference to the accompanying drawings in which: Figure 1 is a side view of a pump according to an embodiment of the present invention;
Figure 2 is a side view of the pump of Figure 1 ;
Figure 3 is a side view of a housing and impeller for the pump of Figure 1 ;
Figure 4 is a perspective view of an impeller and cam for a first stage of the pump of Figure 1 ;
Figure 5 is a perspective view of a secondary stage of the pump of Figure 1 ; and
Figure 6 is a perspective view of the secondary stage of Figure 5 showing the internal components.
Description of Embodiments
[0018] Broadly, the present invention relates to a lubrication pump 1 1 for pumping highly viscous lubricant, such as grease, that provides consistent flow regardless of the output pressure of the pump.
[0019] With reference to Figures 1 to 6, the present invention will now be described. The present invention provides a lubrication pump 1 1 including a drive mechanism 17 in the form of a drive motor, a leg extension 12 extending away from the drive mechanism 17 and a first rotary pumping device 13 attached to the leg extension 12 distal the drive mechanism 17 and a second rotary pumping 15 device adjacent the drive mechanism. A drive shaft 14 is powered by the drive mechanism 17 and powers the first and second pump devices 13, 15.
[0020] In one embodiment of the present invention the drive mechanism 17 is a motor. The skilled addressee will recognize that this could be a hydraulic motor, pneumatic motor, electric motor (either brushless or with brushes) or otherwise.
[0021 ] The first rotary pumping device 13 is located at the end of the leg extension distal the drive mechanism 17 and is arranged to be submerged in the highly viscous lubricant to draw in the highly viscous fluid through inlet 10. [0022] The first rotary pumping device 13 is a low pressure rotary pump and the second rotary pumping device 15 is a high pressure pumping device.
[0023] The first rotary pumping device 13 includes a base insert 19 that serves to define the inlet 10 into the first rotary pumping device 13. From the inlet 10, the high viscous lubricant is drawn into the first rotary pumping mechanism through inlet plate 21 by impellers 23. The impellers 23 then pass the high viscous fluid through the outlet plate 25 and up into the leg extension 12 around the drive shaft 14.
[0024] The impeller 23 includes a central bore 24 into which the drive shaft 14 is inserted to act as a spindle. Yielding vanes 29 extend from the bore 24 to draw the highly viscous fluid into the first rotary pumping device 13 and the pump the highly viscous fluid out of the first rotary pumping device 13. Primary cam 27 is spaced apart from the yielding vanes 29 and causes the yielding vanes 29 to deform and assist with the pumping intake and outlet of the impeller 23 of the first rotary pumping mechanism 13.
[0025] The skilled addressee will recognize that the first rotary pumping device 13 can use a fixed elastomer stator with a rotating helical screw or another spindle driven pumping mechanism in place of the yielding vanes 29 and cam 27 such as a progressive cavity stator and rotor.
[0026] The drive shaft 14 also powers the second rotary pump device 15. The high viscous fluid pumped by the first rotary pumping device 13 is drawn into the second rotary pump device 15 at the low pressure side and then transferred to the high pressure output side of the second rotary pumping device and discharged at high pressure.
[0027] The second rotary pumping device 15 is a gear type pump including in a casing with wall section 33 base 39 and top 35. The base sits on or in the leg 12 and includes a connection (not shown) to drive the drive shaft 14 that extends to and powers the first rotary pumping device 13. The top 35 of the second rotary pumping device 15 connects to the drive mechanism 17. A drive shaft 27 connects to a female connection in the drive mechanism to power the second rotary pumping device 15.
[0028] Connecting the top 25 to the base 39, transferring rotational motion from the drive shaft 27 to the connection in the base and providing the pumping mechanism for the second rotary pumping device 15 is gear pump 42 in housing 41 . The drive shaft powers driving gear 44 which in turn powers driven gear 43 causing gear pumping action to provide high pressure lubricant expression through outlet 31 to be applied to for lubrication.
[0029] In one embodiment, the gear pump 42 is arranged to balance the output of the second rotary pumping device to match the output of the first rotary pumping device.
[0030] Alternatively, the top 35 may include a female connection arranged to receive a male drive shaft of the drive mechanism to power the second rotary pumping device 15.
[0031 ] The skilled addressee will recognize that the second rotating pumping device 15 can be other types of fixed displacement pump such as an internal gear pump, lobe pump, piston pump or otherwise that can be driven by a spindle and transfer rotational motion to drive shaft 27.
[0032] In alternative embodiments of the present invention the housing of the second rotary pumping device 15 can include valves such as check valves, relief valves, dump valves etc., to assist with the lubrication system. The leg 12 can be of a variety of lengths and can include a strainer to minimize the risk of the highly viscous lubricant being contaminated and damaging the rotary pumping devices 13, 15.
[0033] In one embodiment where the drive mechanism 17 is a hydraulic motor, the drive mechanism 17 can include flow and pressure controls. Where the drive mechanism 17 is an electric motor, the drive mechanism can include over current and reverse polarity protection and other control features.
Advantages
[0034] The lubrication pump 1 1 of the present invention provides consistent flow rates and capacity for systems that require large, consistent lubrication without pressure of flow drops.
[0035] The lubrication pump also allows scalability in its principles, offers reliability and efficiency currently not available in high volume pumps for high viscous fluids. Variations and Modifications
[0036] Modifications and variations such as would be apparent to the skilled addressee are considered to fall within the scope of the present invention. The present invention is not to be limited in scope by any of the specific embodiments described herein. These embodiments are intended for the purpose of exemplification only. Functionally equivalent products, formulations and methods are clearly within the scope of the invention as described herein.
[0037] Reference to positional descriptions, such as lower and upper, are to be taken in context of the embodiments depicted in the figures, and are not to be taken as limiting the invention to the literal interpretation of the term but rather as would be understood by the skilled addressee.
[0038] Throughout this specification, unless the context requires otherwise, the word "comprise" or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated integer or group of integers but not the exclusion of any other integer or group of integers.

Claims

CLAIMS:
1 . A lubrication pump for highly viscous fluids including:
an elongate housing arranged to be at least partially submerged in the highly viscous fluid;
a first rotary pumping device;
a second rotary pumping device; and
a drive mechanism to drive the first and second rotary pumping devices.
2. The lubrication pump as claimed in Claim 1 , wherein:
the first rotary pumping device operates as a first stage pump and the second rotary pumping device acts as a second stage rotary pump;
wherein the first stage pump feeds highly viscous fluid to the second stage pump; and
wherein the second stage pump is arranges to discharge the highly viscous fluid consistently.
3. The lubrication pump as claimed in Claim 1 or Claim 2, wherein the first rotary pumping device includes an impeller to pump the highly viscous fluid from a reservoir.
4. The lubrication pump as claimed in anyone of the preceding claims, wherein: the impeller includes flexible vanes and a cam, and
wherein the cam is arranged to deform the flexible vanes for pumping.
5. The lubrication pump as claimed in anyone of the preceding claims, wherein the second rotary pumping device is a gear pump.
6. The lubrication pump as claimed in Claim 5, wherein the gear pump is an external gear pump.
7. The lubrication pump as claimed in anyone of the preceding claims, wherein the drive mechanism is selected from one of the following:
a hydraulic motor;
an electric motor; or
a pneumatic motor.
8. The lubrication pump as claimed in anyone of the preceding claims, wherein the second rotary pump is directly driven by the drive mechanism.
9. The lubrication pump as claimed in anyone of the preceding claims, wherein the second rotary pump transfers rotational motion to a drive shaft that drives the first rotary pump.
10. The lubrication pump as claimed in anyone of the preceding claims, wherein, the first rotary pump is located at the end of the elongate housing distal the drive mechanism.
1 1 . The lubrication pump as claimed in anyone of the preceding claims, wherein the second rotary pump is adapted to balance the output of the second rotary pump to the output of the first rotary pump.
PCT/AU2017/050806 2016-08-15 2017-08-02 Lubrication pump Ceased WO2018032038A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2016903230A AU2016903230A0 (en) 2016-08-15 Lubrication pump
AU2016903230 2016-08-15

Publications (1)

Publication Number Publication Date
WO2018032038A1 true WO2018032038A1 (en) 2018-02-22

Family

ID=61195893

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2017/050806 Ceased WO2018032038A1 (en) 2016-08-15 2017-08-02 Lubrication pump

Country Status (1)

Country Link
WO (1) WO2018032038A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2362922A (en) * 1942-10-16 1944-11-14 Stewart Warner Corp Rotary pump
US2789511A (en) * 1953-05-25 1957-04-23 Jabsco Pump Co Flexible vane pump impeller
US6039545A (en) * 1998-03-31 2000-03-21 Mahr Corporation Method and apparatus for precision metering of high viscosity materials
EP2312161A2 (en) * 2009-10-06 2011-04-20 Oerlikon Textile GmbH & Co. KG Metering device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2362922A (en) * 1942-10-16 1944-11-14 Stewart Warner Corp Rotary pump
US2789511A (en) * 1953-05-25 1957-04-23 Jabsco Pump Co Flexible vane pump impeller
US6039545A (en) * 1998-03-31 2000-03-21 Mahr Corporation Method and apparatus for precision metering of high viscosity materials
EP2312161A2 (en) * 2009-10-06 2011-04-20 Oerlikon Textile GmbH & Co. KG Metering device

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