GB1381366A - Step variable displacement hydraulic motor - Google Patents
Step variable displacement hydraulic motorInfo
- Publication number
- GB1381366A GB1381366A GB5807472A GB5807472A GB1381366A GB 1381366 A GB1381366 A GB 1381366A GB 5807472 A GB5807472 A GB 5807472A GB 5807472 A GB5807472 A GB 5807472A GB 1381366 A GB1381366 A GB 1381366A
- Authority
- GB
- United Kingdom
- Prior art keywords
- passages
- speeds
- return
- pistons
- groups
- 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
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
- F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
- F03C1/0447—Controlling
- F03C1/045—Controlling by using a valve in a system with several pump or motor chambers, wherein the flow path through the chambers can be changed, e.g. series-parallel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
- F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
- F03C1/0403—Details, component parts specially adapted of such engines
- F03C1/0409—Cams
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydraulic Motors (AREA)
Abstract
1381366 Hydraulic reciprocating motors DEERE & CO 15 Dec 1972 [17 Dec 1971] 58074/72 Heading F1A In a variable-speed hydraulic motor comprising a rotary cylinder block 34 with spring-loaded, radial pistons 38 engaging a multi-lobed cam track 22 through rollers 40, the cylinder ports 48 communicate sequentially with valve face passages 61 connected to at least four passages 51 to 54 which are selectively connectable by valves to pressure supply or return, such that the motor can be operated in forward or reverse rotation at different speeds. The different speeds are obtained by connecting selected passages 51 to 54 to return so that associated groups of pistons idle. The cam lobes may be in groups of sequentially increasing height to provide different displacements, e.g. heights in the ratio 1:2 to give three speeds, Figs.5 and 6 (not shown), and 1:2:4 to give seven speeds, pilot-operated slide valves being provided to connect the appropriate groups of cylinders to supply and return, Figs.4, 6 and 8 (not shown). Balancing pistons 65 in alternate passages 61 bear against a thrust bearing 66.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US20915471A | 1971-12-17 | 1971-12-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1381366A true GB1381366A (en) | 1975-01-22 |
Family
ID=22777576
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5807472A Expired GB1381366A (en) | 1971-12-17 | 1972-12-15 | Step variable displacement hydraulic motor |
Country Status (6)
Country | Link |
---|---|
US (1) | US3760691A (en) |
CA (1) | CA964930A (en) |
DE (1) | DE2256975A1 (en) |
FR (1) | FR2165503A5 (en) |
GB (1) | GB1381366A (en) |
IT (1) | IT986034B (en) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2847952A1 (en) * | 1978-11-04 | 1980-05-08 | Rexroth Gmbh G L | HYDRAULIC AXIAL PISTON ENGINE |
US4505185A (en) * | 1981-03-20 | 1985-03-19 | Power-Train, Inc. | Through-shaft energy converter transmission |
AU566382B2 (en) * | 1982-12-24 | 1987-10-15 | Renold Plc | Cam driven piston pump with variable capacity control |
US4581895A (en) * | 1984-06-18 | 1986-04-15 | Deere & Company | Hydrostatic transaxle assembly |
FR2588616B1 (en) * | 1985-10-16 | 1988-01-08 | Poclain Hydraulics Sa | MECHANISM, PUMP MOTOR, HAVING AT LEAST TWO SEPARATE ACTIVE CYLINDERS. |
FR2611816B1 (en) * | 1987-02-25 | 1989-07-13 | Poclain Hydraulics Sa | MULTI-CYLINDER PRESSURE FLUID MECHANISM, MOTOR OR PUMP |
FR2661456B1 (en) * | 1990-04-26 | 1992-08-14 | Poclain Hydraulics Sa | PRESSURE FLUID MECHANISM, SUCH AS A MOTOR OR A HYDRAULIC PUMP, WITH MULTIPLE OPERATING CYLINDERS. |
DE4313025A1 (en) * | 1993-04-21 | 1994-10-27 | Zahnradfabrik Friedrichshafen | Hydrostatic-mechanical gear for driving a mixing drum |
JP2003278883A (en) * | 2002-03-26 | 2003-10-02 | Komatsu Ltd | Variable hydraulic motor, and travel driving reduction gear for crawler type vehicle using the same |
US8132868B2 (en) * | 2004-12-17 | 2012-03-13 | Walker Frank H | Hydraulic regenerative braking system for a vehicle |
US20080210500A1 (en) * | 2005-05-11 | 2008-09-04 | Walker Frank H | Hydraulic Regenerative Braking System For a Vehicle |
DE102006058076A1 (en) * | 2006-12-07 | 2008-06-19 | Zf Friedrichshafen Ag | Hydraulic radial piston motor |
US8176838B2 (en) * | 2007-02-12 | 2012-05-15 | Walker Frank H | Hydraulic machine arrangement |
US8162621B2 (en) * | 2007-02-12 | 2012-04-24 | Walker Frank H | Hydraulic machine arrangement |
FR2955903B1 (en) * | 2010-02-01 | 2012-03-16 | Poclain Hydraulics Ind | HYDROBASE-FORMING SUBASSEMBLY FOR HYDRAULIC ENGINES AND METHOD OF ASSEMBLY |
FR3030645B1 (en) * | 2014-12-17 | 2019-10-11 | Poclain Hydraulics Industrie | RADIAL PISTON HYDRAULIC APPARATUS |
US10465354B2 (en) | 2016-12-15 | 2019-11-05 | Caterpillar Inc. | Hydraulic fluid systems for machine implements |
EP3608535B1 (en) * | 2018-08-09 | 2021-06-09 | Robert Bosch GmbH | Hydrostatic radial piston machine |
EP4102051A1 (en) * | 2021-06-07 | 2022-12-14 | Robert Bosch GmbH | Multi piston machine with at least three switchable displacement volumes |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2160612A (en) * | 1934-02-01 | 1939-05-30 | American Eng Co Ltd | Hydraulic transmission |
FR1411046A (en) * | 1964-06-03 | 1965-09-17 | Poclain Sa | Improvements to hydraulic motors with rotary cylinder block |
FR1460752A (en) * | 1965-10-08 | 1966-01-07 | Poclain Sa | Method and device for changing gear for a hydraulic motor |
FR1563866A (en) * | 1968-02-07 | 1969-04-18 | ||
US3511131A (en) * | 1968-06-24 | 1970-05-12 | Deere & Co | Hydraulic motor |
-
1971
- 1971-12-17 US US00209154A patent/US3760691A/en not_active Expired - Lifetime
-
1972
- 1972-06-22 CA CA145,440A patent/CA964930A/en not_active Expired
- 1972-11-21 DE DE2256975A patent/DE2256975A1/en active Pending
- 1972-12-13 FR FR7244306A patent/FR2165503A5/fr not_active Expired
- 1972-12-15 GB GB5807472A patent/GB1381366A/en not_active Expired
- 1972-12-15 IT IT54783/72A patent/IT986034B/en active
Also Published As
Publication number | Publication date |
---|---|
IT986034B (en) | 1975-01-10 |
CA964930A (en) | 1975-03-25 |
DE2256975A1 (en) | 1973-06-20 |
US3760691A (en) | 1973-09-25 |
FR2165503A5 (en) | 1973-08-03 |
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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 |