GB1425297A - Hydraulic pump or motor - Google Patents
Hydraulic pump or motorInfo
- Publication number
- GB1425297A GB1425297A GB519874A GB519874A GB1425297A GB 1425297 A GB1425297 A GB 1425297A GB 519874 A GB519874 A GB 519874A GB 519874 A GB519874 A GB 519874A GB 1425297 A GB1425297 A GB 1425297A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- motor
- zone
- hydraulic gear
- port
- 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
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
- 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
- F04C2/082—Details specially related to intermeshing engagement type machines or pumps
- F04C2/088—Elements in the toothed wheels or the carter for relieving the pressure of fluid imprisoned in the zones of engagement
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Hydraulic Motors (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
1425297 Hydraulic gear-pumps and motors RELIANCE ELECTRIC CO 5 Feb 1974 [20 April 1973] 05198/74 Heading F1F To relieve the pressure of fluid trapped in the zone between the meshing teeth of an hydraulic gear-pump or motor, a port 100 in one or both of a pair of pressure-loaded cheek-plates connects the zone 92, 92a via passageway 102 or 103 with whichever of the ports 80, 82 is at the higher pressure via recess 86 or 90 in the pressure plates. As shown, a ball 104 located in a chamber 106 connecting passageways 102, 103 acts as a valve to ensure that the trapped fluid is always directed to the high-pressure port irrespective of the direction of rotation of the gears. The effect is to reduce wear and noise.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00352938A US3817665A (en) | 1973-04-20 | 1973-04-20 | Hydraulic pump or motor |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1425297A true GB1425297A (en) | 1976-02-18 |
Family
ID=23387090
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB519874A Expired GB1425297A (en) | 1973-04-20 | 1974-02-05 | Hydraulic pump or motor |
Country Status (7)
Country | Link |
---|---|
US (1) | US3817665A (en) |
JP (1) | JPS502203A (en) |
BE (1) | BE811635A (en) |
CA (1) | CA989247A (en) |
FR (1) | FR2226572B1 (en) |
GB (1) | GB1425297A (en) |
IT (1) | IT1009909B (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4781552A (en) * | 1985-11-27 | 1988-11-01 | Jean Malfit | High pressure hydraulic generator receiver for power transmission |
US4824331A (en) * | 1987-07-29 | 1989-04-25 | Hydreco, Incorporated | Variable discharge gear pump with energy recovery |
US5167320A (en) * | 1991-03-04 | 1992-12-01 | Reliance Electric Industrial Company | Variable speed drive for screw conveyor |
EP0519276B1 (en) * | 1991-06-19 | 1995-08-16 | Eaton Corporation | Supercharger carry-over venting means |
US5190450A (en) * | 1992-03-06 | 1993-03-02 | Eastman Kodak Company | Gear pump for high viscosity materials |
JP3830313B2 (en) * | 1999-09-06 | 2006-10-04 | 株式会社ジェイテクト | Gear pump |
US6808121B2 (en) * | 2003-02-11 | 2004-10-26 | Charles J. Rice | Fluid pump |
GB0406897D0 (en) * | 2004-03-26 | 2004-04-28 | Wabco Automotive Uk Ltd | Vacuum pump oil pressure relief |
US20070178003A1 (en) * | 2005-11-22 | 2007-08-02 | Parker-Hannifin Corporation | Gear pump with ripple chamber for low noise and pressure ripples |
DE202006014930U1 (en) | 2006-09-28 | 2008-02-14 | Trw Automotive Gmbh | Hydraulic device |
DE102007031901B4 (en) * | 2007-07-09 | 2014-06-12 | Schwäbische Hüttenwerke Automotive GmbH & Co. KG | Reciprocating positive displacement pump with filling level increasing inlet |
WO2015179042A1 (en) * | 2014-05-21 | 2015-11-26 | Imo Industries, Inc. | A gear pump having through-shaft bearing weepage control |
CN110848132B (en) * | 2019-12-04 | 2021-08-06 | 中国直升机设计研究所 | Hand-operated hydraulic refueling device for aircraft |
US11953032B2 (en) * | 2021-02-09 | 2024-04-09 | Caterpillar Inc. | Hydraulic pump or motor with mounting configuration for increased torque |
US12006924B2 (en) | 2021-08-04 | 2024-06-11 | Caterpillar Inc. | Axial piston pump mounting flange configuration |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1129090A (en) * | 1914-04-08 | 1915-02-23 | American La France Fire Engine Company Inc | Gear-pump. |
US2281767A (en) * | 1940-07-12 | 1942-05-05 | Du Pont | Pump |
US2884864A (en) * | 1955-04-14 | 1959-05-05 | Borg Warner | Pressure loaded pump, trapping grooves |
-
1973
- 1973-04-20 US US00352938A patent/US3817665A/en not_active Expired - Lifetime
-
1974
- 1974-02-01 CA CA191,520A patent/CA989247A/en not_active Expired
- 1974-02-05 GB GB519874A patent/GB1425297A/en not_active Expired
- 1974-02-27 BE BE141443A patent/BE811635A/en unknown
- 1974-03-27 FR FR7410484A patent/FR2226572B1/fr not_active Expired
- 1974-04-09 JP JP49039548A patent/JPS502203A/ja active Pending
- 1974-04-18 IT IT21597/74A patent/IT1009909B/en active
Also Published As
Publication number | Publication date |
---|---|
US3817665A (en) | 1974-06-18 |
FR2226572A1 (en) | 1974-11-15 |
IT1009909B (en) | 1976-12-20 |
DE2409118B2 (en) | 1977-02-10 |
CA989247A (en) | 1976-05-18 |
DE2409118A1 (en) | 1974-11-14 |
JPS502203A (en) | 1975-01-10 |
BE811635A (en) | 1974-06-17 |
FR2226572B1 (en) | 1978-04-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |