US3857461A - Bidirectional pump system having plural lubrication circuits - Google Patents
Bidirectional pump system having plural lubrication circuits Download PDFInfo
- Publication number
- US3857461A US3857461A US00351479A US35147973A US3857461A US 3857461 A US3857461 A US 3857461A US 00351479 A US00351479 A US 00351479A US 35147973 A US35147973 A US 35147973A US 3857461 A US3857461 A US 3857461A
- Authority
- US
- United States
- Prior art keywords
- check valve
- fluid
- pump
- communicating
- flow
- 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.)
- Expired - Lifetime
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Classifications
-
- 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
- F16N13/22—Lubricating-pumps with distributing equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D55/00—Endless track vehicles
- B62D55/08—Endless track units; Parts thereof
- B62D55/12—Arrangement, location, or adaptation of driving sprockets
- B62D55/125—Final drives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D55/00—Endless track vehicles
- B62D55/08—Endless track units; Parts thereof
- B62D55/12—Arrangement, location, or adaptation of driving sprockets
- B62D55/125—Final drives
- B62D55/13—Final drives readily interchangeable modular type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/06—Means for keeping lubricant level constant or for accommodating movement or position of machines or engines
-
- 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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
- F16N7/38—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pump; Central lubrication systems
- F16N7/40—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pump; Central lubrication systems in a closed circulation system
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- General Details Of Gearings (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
A bidirectional pump circulates fluid through a common filter to two lubrication circuits individually having a sump, an inlet line to the pump, a system to be lubricated, and a return path to the sump. A check-type shuttle valve causes fluid to be discharged through either of two outlet paths according to the direction of pump rotation by way of a filter and thence to the two circuits. Alternatively, a dual check valve is provided in place of the shuttle valve.
Description
llitite States Sehitt tent 1 [4 1 Dec. 31, 1974 BIDIRECTIONAL PUMP SYSTEM HAVING PLURAL LUBRICATION CIRCUITS [52] US. Cl l84/6.2, 417/315, 418/32 [51] Int. Cl. F04b 19/04 [58] Field of Search 417/315, 503; 418/32, 15; 184/62, 6.28
[56] References Cited UNITED STATES PATENTS 1,000,188 8/1911 Morse 184/6.2 1,355,229 10/1920 Jones 184/62 1,595,381 8/1926 Christensen 417/315 X 1,687,523 10/1928 Stavde 418/32 2,778,316 1/1957 l-Iaight et al. 418/15 X 3,767,014 10/1973 Drone 184/612 FOREIGN PATENTS OR APPLICATIONS 512,158 1/1955 Italy ..4l8/32 653,628 12/1962 Canada ..4l8/32 Primary Examiner-William L. Freeh Assistant Examiner-Richard Sher Attorney, Agent, or Firm-Phillips, Moore, Weissenberger, Lempio & Strabala [57] ABSTRACT A bidirectional pump circulates fluid through a common filter to two lubrication circuits individually having a sump, an inlet line to the pump, a system to be lubricated, and a return path to the sump. A checktype shuttle valve causes fluid to be discharged through either of two outlet paths according to the di rection of pump rotation by way of a filter and thence to the two circuits. Alternatively, a dual check valve is provided in place of the shuttle valve.
7 Claims, 2 Drawing Figures BACKGROUND OF THE INVENTION The present invention is directed to liquid pump systems. In particular, the invention is directed to plural lubrication systems having bidirectional pumps.
Various forms of machinery, such as earthmoving vehicles or the like, frequently require multiple lubrication systems, and it has been the practice to provide separate pumps, sumps, filters, and associated circuitry to match the flow requirements of the individual systems. This has proved to be expensive since duplicate components are not only provided, but also must be independently serviced.
With the simple adoption of a common lubricating fluid, a single pump could be used to draw fluid from two sumps, for example; and reference is made to US. Pat. No. 3,420,180 to Behrends, et al, assigned to the assignee of the present invention, showing such a system. However, an accompanying problem with many of these lubricating circuits that evolves because of economical considerations is that unidirectional pumps are adapted thereto which are ineffective in one direction of rotation, notwithstanding the fact that they are driven by reversible mechanisms. Consequently, the fluid flow to such lubricating circuits is terminated for the duration of the time that the pumps are being driven in reverse. An example of such a unidirectional pump system adapted specifically to the final drive of a track-type tractor is set forth in application Ser. No. 327,093, filed Jan. 26, 1973.
SUMMARY OF THE INVENTION Accordingly, it is an object of this invention to provide a bidirectional pumping system for distributing fluids to plural lubricating circuits.
It is a further object of this invention to provide a bi directional pump system which will distribute lubricant fluid to plural lubricating systems in either direction of pump rotation.
It is a further object to provide such a pumping system using a single pump to feed two lubricant systems and thus save material and cost.
It is a still further object to provide a bidirectional pump system having proportional distribution and selfbalancing capability.
The invention takes the form ofa system having a bidirectional pump for pumping fluid from a pair of spaced-apart sumps and thence through a shuttle-type check valve, and a pair of circuits including lubricant systems before returning to sump. The check valve serves to direct fluid to the lubricant systems in either pump flow direction. A pair of spaced-apart sumps ensures self-balancing if the flow requirements of each circuit are unequal and/or one pump inlet line is not fully immersed in fluid because of the tilting of the vehicle or associated machinery. Fluid distribution is continued to both circuits from the other of the pump inlet lines, thus provides self-balancing of the fluid levels in the two circuits. Flow control orifices in the circuits provide for proportional flow to each lubricant system.
Other objects and advantages will be apparent to one skilled in the art from the following description and drawings.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall schematic diagram illustrating the features of the present invention.
' FIG. 2 is a view of an alternate embodiment of the check valve of the system of FIG. 1.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT With reference to FIG. 1, there is illustrated generally a dual lubrication system 10 incorporating a bidirectional, gear-type pump 12, a filter l4, and first and second horizontally spaced- apart sumps 16 and 18 at the same vertical level, respectively. The pump includes a pair of intermeshing gears 20 and 22 which are driven by a reversible mechanism such as associated with a final drive of a conventional vehicle (not shown). When these gears are driven in the clockwise and counterclockwise directions as shown by the solidand broken-line arrows, respectively, they draw fluid upwardly from the first and second sumps through a first inlet conduit 24 to a first cavity 26, and a second inlet conduit 28 into a second pump cavity 30. Fluid from the first and second cavities is drawn centrally inwardly and upwardly with rotation of the gears, as shown by the solid arrows, to a first chamber 32 and thence to a first discharge or outlet conduit 34. Conversely, if the gears 20 and 22 are respectively driven in the counterclockwise and clockwise directions shown by the broken arrows, fluid in the cavities 26 and 30 is pumped to a second chamber 36 and to a second discharge or outlet conduit 38.
The first and second discharge conduits 34 and 38 are disposed on opposite ends of and communicate with a shuttle-type check valve 40. A filter inlet passage 42 medially communicates valve 411 with filter 14. With rotation of the gears in the direction of the solid arrows and consequent pressurization of the first discharge conduit 34, a ball 44 is urged rightwardly against a seat 46 to block flow of pressurized lubricant to the conduit 38 and allow free travel thereof to the filter inlet passage. When the pump is driven in reverse in the direction of the broken arrows and the second discharge line 38 is pressurized, the ball 44 is moved leftwardly against the seat 48 to block the pressurized fluid from the conduit 34. Thus, in either direction of rotation of the gear pump 12, fluid flows through the filter inlet passage 42, the filter 14, a filter outlet passage 50, and to a first branch conduit 52 and a second branch conduit 54.
The divided fiow of fluid in the branch conduits 52 and 54 is proportioned by a first flow control orifice 56 associated with a first lubrication system 58, and a second flow control orifice 60 associated with a second lubrication system 62. While fluid from the first lubrication system 58 is delivered to the first sump 16 through a schematically represented first return path or conduit 64, fluid from the second lubricant system 62 is delivered to the second sump 18 through a similar second return path or conduit 66. Thus, a first lubrication circuit shown generally by the reference numeral 68 is defined by the sump 16, inlet conduit 24, pump 12, filter l4, branch conduit 52, flow control orifice 56, lubrication system 58, and return conduit 64. A second lubrication circuit 70 is similarly defined by the sump l8, inlet conduit 28, pump 12, filter 14, branch conduit 54,
In the event that an inlet port 72 or the first inlet conduit 24 or an inlet port 74 of the second inlet conduit 28 is uncovered from the fluid contained in the sumps 16 and 18, respectively, due to disproportionate flow distribution such as may occur due to tilting of the vehicle or associated mechanism containing the subject dual lubrication circuits, the opposite inlet port 74 or 72 will still serve to distribute fluid to both the lubrication circuits 68 and 70. The flow- proportioning control orifices 56 and 60 will proportionately distribute the fluid from the pump 12 and, entering one of the intake conduits 24 or 28 to both sumps 16 and 18, the system will be self-balancing.
Turning to FIG. 2, a dual check valve system 76 may be alternately used in place of the shuttle-type check valve 40 in FIG. 1. In this alternate embodiment, a first check valve 78 is opened and a second check valve 80 is closed when outlet conduit 34 is pressurized allowing flow of fluid to filter inlet passage 42, while blocking the evacuated conduit 38. ln reverse operation of the gear pump 12 and with pressurization of the outlet conduit 38, the second check valve 80 is opened and the first check valve 78 is closed, allowing fluid passage to the inlet passage 42 in a manner substantially similar to that of the preferred embodiment, Springs 82, 84 normally bias balls 86, 88, against seats 90, 92, respectively.
It is to be understood that the foregoing description is merely illustrative of preferred embodiments of the invention and that the scope of the invention is not to be limited thereto, but is to be determined by the scope of the appended claims.
What is claimed is:
1. In a fluid system,
a bidirectional pump including a housing defining first and second chambers,
first and second horizontally spaced apart sumps at substantially the same vertical level,
means communicating said first sump with said first chamber and separate means communicating said second sump with said second chamber,
first and second separate lubricant systems intercommunicating with said first and second sumps, respectively,
check valve means comprising a check valve,
a first discharge conduit communicating said first chamber with said check valve, and
a second discharge conduit communicating said second chamber with said check valve, said check valve means operable to direct fluid flow to said first and second lubricant systems in either flow direction of the bidirectional pump whereby fluid supply is maintained to said first and second fluid systems regardless of pump flow direction and tilting of said system which causes disproportionate flow distribution, means communicating said first and second lubricant systems with said first and second sumps, respectively, for returning fluid thereto, and,
flow control means intermediate said check valve means and said lubricant systems, for proportioning flow between said first and second lubricant systems. A
2. The invention of claim 1 further including a filter intermediate said check valve and said lubricant sys tems.
3. The invention of claim 1 wherein said check valve comprises a check valve housing having a pair of seats and a ball adapted for movement within said check valve housing and for sealing engagement with said seats.
4. The invention of claim 1 wherein said check valve comprises a first check valve communicating with said first discharge conduit, and
a second check valve communicating with said second discharge conduit.
5. The invention of claim 4 wherein said first check valve comprises a first ball and spring means biasing said first ball against a first seat.
6. The invention of claim 4 wherein said second check valve comprises a second ball and spring means biasing said second ball against a second seat.
7. The invention of claim 1 wherein said flow control means comprise an orifice located intermediate said pump and each of said lubricant systems.
l l l l
Claims (7)
1. In a fluid system, a bidirectional pump including a housing defining first and second chambers, first and second horizontally spaced apart sumps at substantially the same vertical level, means communicating said first sump with said first chamber and separate means communicating said second sump with said second chamber, first and second separate lubricant systems intercommunicating with said first and second sumps, respectively, check valve means comprising a check valve, a first discharge conduit communicating said first chamber with said check valve, and a second discharge conduit communicating said second chamber with said check valve, said check valve means operable to direct fluid flow to said first and second lubricant systems in either flow direction of the bidirectional pump whereby fluid supply is maintained to said first and second fluid systems regardless of pump flow direction and tilting of said system which causes disproportionate flow distribution, means communicating said first and second lubricant systems with said first and second sumps, respectively, for returning fluid thereto, and, flow control means intermediate said check valve means and said lubricant systems, for proportioning flow between said first and second lubricant systems.
2. The invention of claim 1 further including a filter intermediate said check valve and said lubricant systems.
3. The invention of claim 1 wherein said check valve comprises a check valve housing having a pair of seats and a ball adapted for movement within said check valve housing and for sealing engagement with said seats.
4. The invention of claim 1 wherein said check valve comprises a first check valve communicating with said first discharge conduit, and a second check valve communicating with said second discharge conduit.
5. The invention of claim 4 wherein said first check valve comprises a first ball and spring means biasing said first ball against a first seat.
6. The invention of claim 4 wherein said second check valve comprises a second ball and spring means biasing said second ball against a second seat.
7. The invention of claim 1 wherein said flow control means comprise an orifice located intermediate said pump and each of said lubricant systems.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00351479A US3857461A (en) | 1973-04-16 | 1973-04-16 | Bidirectional pump system having plural lubrication circuits |
JP48102267A JPS507971A (en) | 1973-04-16 | 1973-09-12 | |
FR7411504A FR2225687B1 (en) | 1973-04-16 | 1974-03-29 | |
GB1458374A GB1458285A (en) | 1973-04-16 | 1974-04-02 | Bidirectional pump system having plural lubrication circuits |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00351479A US3857461A (en) | 1973-04-16 | 1973-04-16 | Bidirectional pump system having plural lubrication circuits |
Publications (1)
Publication Number | Publication Date |
---|---|
US3857461A true US3857461A (en) | 1974-12-31 |
Family
ID=23381104
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00351479A Expired - Lifetime US3857461A (en) | 1973-04-16 | 1973-04-16 | Bidirectional pump system having plural lubrication circuits |
Country Status (4)
Country | Link |
---|---|
US (1) | US3857461A (en) |
JP (1) | JPS507971A (en) |
FR (1) | FR2225687B1 (en) |
GB (1) | GB1458285A (en) |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3994634A (en) * | 1975-10-28 | 1976-11-30 | Rockwell International Corporation | Reversible lubricant pump |
US4040505A (en) * | 1975-10-29 | 1977-08-09 | Fiat-Allis Construction Machinery, Inc. | Lubrication system for earth moving equipment |
US4153141A (en) * | 1977-06-20 | 1979-05-08 | General Electric Company | Auxiliary oil supply system |
US4728260A (en) * | 1986-04-30 | 1988-03-01 | Maruko Keihouki Kabushiki Kaisha | Direction-selectable sending-out pump |
US6814409B2 (en) | 2001-04-12 | 2004-11-09 | A-Dec, Inc. | Hydraulic drive system |
US20080083572A1 (en) * | 2006-10-04 | 2008-04-10 | Toyota Jidosha Kabushiki Kaisha | Wheel assembly with in-wheel motor |
US20100028187A1 (en) * | 2006-03-29 | 2010-02-04 | Peter Mastalir | Supplement lubricant free pneumatic motor |
US20100200072A1 (en) * | 2007-07-30 | 2010-08-12 | Cooltech Applications S.A.S. | Gear pump and method of delivering fluid using such a pump |
DE102011055194A1 (en) * | 2011-11-10 | 2013-05-16 | Gkn Walterscheid Gmbh | Hydraulic pump assembly |
US20130233107A1 (en) * | 2010-09-02 | 2013-09-12 | Kaspar Freiherr von Wilmowsky | Gear Train |
US20140165530A1 (en) * | 2012-12-19 | 2014-06-19 | United Technologies Corporation | Bi-Directional Auxiliary Lubrication System |
CN104033720A (en) * | 2014-05-14 | 2014-09-10 | 辽宁惠通润滑设备制造有限公司 | Intelligent control lubricating oil pump |
DE102014111133A1 (en) * | 2014-08-05 | 2016-02-11 | Robert Bosch Automotive Steering Gmbh | Filtering for reversible gear machine |
DE102014016173A1 (en) * | 2014-11-03 | 2016-05-04 | Audi Ag | Drive device for a motor vehicle |
US20160341124A1 (en) * | 2015-05-19 | 2016-11-24 | Rolls-Royce Corporation | Lubrication system for a reconfigurable gas turbine engine |
US20170152935A1 (en) * | 2015-12-01 | 2017-06-01 | The Boeing Company | Reconfigurable Lubrication System for Tiltrotor Transmission |
EP3215743B1 (en) * | 2014-11-03 | 2018-10-24 | Continental Automotive GmbH | Positive displacement pump |
DE102019210512A1 (en) * | 2019-07-17 | 2021-01-21 | Zf Friedrichshafen Ag | Transmissions, in particular motor vehicle transmissions |
US10905973B2 (en) * | 2013-02-27 | 2021-02-02 | C.C. Jensen A/S | Device for processing a liquid under vacuum pressure |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4631009A (en) * | 1984-07-18 | 1986-12-23 | Sundstrand Corporation | Lubrication scavenge system |
AT413203B (en) * | 2002-02-26 | 2005-12-15 | Bauer & Co Gmbh Reform Werke | ARRANGEMENT OF TWO OR MORE INDEPENDENT TRANSMISSION UNITS |
CN101907108A (en) * | 2010-07-29 | 2010-12-08 | 南通航海机械集团有限公司 | Miniature power unit |
CN103437997A (en) * | 2013-05-22 | 2013-12-11 | 麦特汽车服务股份有限公司 | Noise-reducing implementation method for gear pump of automotive transmission detecting and cleaning apparatus |
JP6470613B2 (en) * | 2015-03-30 | 2019-02-13 | 株式会社Subaru | Oil pump |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1000188A (en) * | 1908-03-07 | 1911-08-08 | Alfred B Morse | Automatic lubricator for motor-car engines. |
US1355229A (en) * | 1917-01-27 | 1920-10-12 | John D Jones | Lubricating system for explosive-engines |
US1595381A (en) * | 1924-05-07 | 1926-08-10 | Niels A Christensen | Oil pump |
US1687523A (en) * | 1926-02-15 | 1928-10-16 | Edwin G Staude | Fluid-pressure pump for power-propelled vehicle-controlling means |
US2778316A (en) * | 1952-02-12 | 1957-01-22 | Hiram H Haight | Reversible pump with automatic valving |
CA653628A (en) * | 1962-12-04 | Beribisky, Vladimir | Gear pump or motor | |
US3767014A (en) * | 1972-05-26 | 1973-10-23 | Allis Chalmers | Filter system for crawler tractor final drives |
-
1973
- 1973-04-16 US US00351479A patent/US3857461A/en not_active Expired - Lifetime
- 1973-09-12 JP JP48102267A patent/JPS507971A/ja active Pending
-
1974
- 1974-03-29 FR FR7411504A patent/FR2225687B1/fr not_active Expired
- 1974-04-02 GB GB1458374A patent/GB1458285A/en not_active Expired
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA653628A (en) * | 1962-12-04 | Beribisky, Vladimir | Gear pump or motor | |
US1000188A (en) * | 1908-03-07 | 1911-08-08 | Alfred B Morse | Automatic lubricator for motor-car engines. |
US1355229A (en) * | 1917-01-27 | 1920-10-12 | John D Jones | Lubricating system for explosive-engines |
US1595381A (en) * | 1924-05-07 | 1926-08-10 | Niels A Christensen | Oil pump |
US1687523A (en) * | 1926-02-15 | 1928-10-16 | Edwin G Staude | Fluid-pressure pump for power-propelled vehicle-controlling means |
US2778316A (en) * | 1952-02-12 | 1957-01-22 | Hiram H Haight | Reversible pump with automatic valving |
US3767014A (en) * | 1972-05-26 | 1973-10-23 | Allis Chalmers | Filter system for crawler tractor final drives |
Cited By (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2329462A1 (en) * | 1975-10-28 | 1977-05-27 | Rockwell International Corp | REVERSIBLE LUBRICATION DEVICE AND PUMP, ESPECIALLY FOR VEHICLES WITH TWO DRIVE AXLES |
US3994634A (en) * | 1975-10-28 | 1976-11-30 | Rockwell International Corporation | Reversible lubricant pump |
US4040505A (en) * | 1975-10-29 | 1977-08-09 | Fiat-Allis Construction Machinery, Inc. | Lubrication system for earth moving equipment |
US4153141A (en) * | 1977-06-20 | 1979-05-08 | General Electric Company | Auxiliary oil supply system |
US4728260A (en) * | 1986-04-30 | 1988-03-01 | Maruko Keihouki Kabushiki Kaisha | Direction-selectable sending-out pump |
US6814409B2 (en) | 2001-04-12 | 2004-11-09 | A-Dec, Inc. | Hydraulic drive system |
US20100028187A1 (en) * | 2006-03-29 | 2010-02-04 | Peter Mastalir | Supplement lubricant free pneumatic motor |
US20080083572A1 (en) * | 2006-10-04 | 2008-04-10 | Toyota Jidosha Kabushiki Kaisha | Wheel assembly with in-wheel motor |
US8261866B2 (en) * | 2006-10-04 | 2012-09-11 | Toyota Jidosha Kabushiki Kaisha | Wheel assembly with in-wheel motor |
US20100200072A1 (en) * | 2007-07-30 | 2010-08-12 | Cooltech Applications S.A.S. | Gear pump and method of delivering fluid using such a pump |
US8348637B2 (en) * | 2007-07-30 | 2013-01-08 | Cooltech Applications S.A.S. | Gear pump and method of delivering fluid using such a pump |
US20130233107A1 (en) * | 2010-09-02 | 2013-09-12 | Kaspar Freiherr von Wilmowsky | Gear Train |
DE102011055194B4 (en) * | 2011-11-10 | 2018-01-18 | Gkn Walterscheid Gmbh | Hydraulic pump assembly |
US20130121854A1 (en) * | 2011-11-10 | 2013-05-16 | Gkn Walterscheid Gmbh | Gearbox |
DE102011055194A1 (en) * | 2011-11-10 | 2013-05-16 | Gkn Walterscheid Gmbh | Hydraulic pump assembly |
US9765643B2 (en) * | 2012-12-19 | 2017-09-19 | United Technologies Corporation | Bi-directional auxiliary lubrication system |
US20140165530A1 (en) * | 2012-12-19 | 2014-06-19 | United Technologies Corporation | Bi-Directional Auxiliary Lubrication System |
US10905973B2 (en) * | 2013-02-27 | 2021-02-02 | C.C. Jensen A/S | Device for processing a liquid under vacuum pressure |
CN104033720A (en) * | 2014-05-14 | 2014-09-10 | 辽宁惠通润滑设备制造有限公司 | Intelligent control lubricating oil pump |
DE102014111133A1 (en) * | 2014-08-05 | 2016-02-11 | Robert Bosch Automotive Steering Gmbh | Filtering for reversible gear machine |
DE102014016173A1 (en) * | 2014-11-03 | 2016-05-04 | Audi Ag | Drive device for a motor vehicle |
EP3215743B1 (en) * | 2014-11-03 | 2018-10-24 | Continental Automotive GmbH | Positive displacement pump |
US10451060B2 (en) | 2014-11-03 | 2019-10-22 | Continental Automotive Gmbh | Positive displacement pump having multiple operating stages |
US10480637B2 (en) | 2014-11-03 | 2019-11-19 | Audi Ag | Lubrication system for a drive device of a motor vehicle |
US10260420B2 (en) * | 2015-05-19 | 2019-04-16 | Rolls-Royce Corporation | Lubrication system for a reconfigurable gas turbine engine |
US20160341124A1 (en) * | 2015-05-19 | 2016-11-24 | Rolls-Royce Corporation | Lubrication system for a reconfigurable gas turbine engine |
US20170152935A1 (en) * | 2015-12-01 | 2017-06-01 | The Boeing Company | Reconfigurable Lubrication System for Tiltrotor Transmission |
US10655728B2 (en) * | 2015-12-01 | 2020-05-19 | The Boeing Company | Reconfigurable lubrication system for tiltrotor transmission |
DE102019210512A1 (en) * | 2019-07-17 | 2021-01-21 | Zf Friedrichshafen Ag | Transmissions, in particular motor vehicle transmissions |
Also Published As
Publication number | Publication date |
---|---|
FR2225687A1 (en) | 1974-11-08 |
JPS507971A (en) | 1975-01-27 |
FR2225687B1 (en) | 1977-10-21 |
GB1458285A (en) | 1976-12-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: CATERPILLAR INC., 100 N.E. ADAMS STREET, PEORIA, I Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CATERPILLAR TRACTOR CO., A CORP. OF CALIF.;REEL/FRAME:004669/0905 Effective date: 19860515 Owner name: CATERPILLAR INC., A CORP. OF DE.,ILLINOIS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CATERPILLAR TRACTOR CO., A CORP. OF CALIF.;REEL/FRAME:004669/0905 Effective date: 19860515 |