GB1249732A - Radial piston type hydraulic pump or motor - Google Patents

Radial piston type hydraulic pump or motor

Info

Publication number
GB1249732A
GB1249732A GB5138/69A GB513869A GB1249732A GB 1249732 A GB1249732 A GB 1249732A GB 5138/69 A GB5138/69 A GB 5138/69A GB 513869 A GB513869 A GB 513869A GB 1249732 A GB1249732 A GB 1249732A
Authority
GB
United Kingdom
Prior art keywords
cylinder
piston
passages
pressure liquid
motor
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
Application number
GB5138/69A
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 JP743668U external-priority patent/JPS4734888Y1/ja
Priority claimed from JP1223668U external-priority patent/JPS4734889Y1/ja
Priority claimed from JP1223568U external-priority patent/JPS4719773Y1/ja
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of GB1249732A publication Critical patent/GB1249732A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B1/00—Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements
    • F01B1/06—Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements with cylinders in star or fan arrangement
    • F01B1/0641—Details, component parts specially adapted for such machines
    • F01B1/0644—Pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Hydraulic Motors (AREA)
  • Reciprocating Pumps (AREA)

Abstract

1,249,732. Radial cylinder pumps or motors. HITACHI Ltd. Jan.30, 1969 [Feb. 5, 1968; Feb.21, 1968 (2)], No.5138/69. Heading F1A. In an inwardly acting radial cylinder pump or motor in which the pistons carry balls or rollers 9 and are reciprocated by a multilobed cam 11, the side thrust force F1 which is exerted by each piston on its associated cylinder wall on the outward stroke is counterbalanced by the admission of pressure liquid between the piston and cylinder at the position of application of that force. As shown in Fig. 3 a cylinder block having cylinders 2 rotates with a shaft 1 Fig. 1 (not shown) and has secured thereto an annular valve member 14 rotatable about a valve surface 20 of a valve body 19 secured to the casing (10), the valve body 19, for motor operation, alternately supplying and exhausting pressure liquid from the working chamber 13 via passages 14, and supply passage 21 on the pressure stroke, and passages 14 and exhaust passage 22 on the exhaust stroke. With the motor rotating anti-clockwise pressure liquid is admitted to chamber 13 and also passes through supply passages 21, 31 communicating on the outward stroke with distribution recesses 41 open via passage 33 to the opening 35 in the cylinder 2 to counterbalance the thrust force F1 When the motor rotates clockwise the thrust force acts on the opposite wall of the cylinder and is counterbalanced through opening 36. In alternative constructions the passages supplying pressure liquid to the gaps between the piston and cylinder are located within the piston and maybe provided with spring-loaded lift valves which automatically control the flow of liquid according to the gap between the piston and cylinder. In a further embodiment the passages are located in the cylinder and have restrictions controlling the pressure liquid flow.
GB5138/69A 1968-02-05 1969-01-30 Radial piston type hydraulic pump or motor Expired GB1249732A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP743668U JPS4734888Y1 (en) 1968-02-05 1968-02-05
JP1223668U JPS4734889Y1 (en) 1968-02-21 1968-02-21
JP1223568U JPS4719773Y1 (en) 1968-02-21 1968-02-21

Publications (1)

Publication Number Publication Date
GB1249732A true GB1249732A (en) 1971-10-13

Family

ID=27277609

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5138/69A Expired GB1249732A (en) 1968-02-05 1969-01-30 Radial piston type hydraulic pump or motor

Country Status (4)

Country Link
US (1) US3858487A (en)
FR (1) FR2001321A1 (en)
GB (1) GB1249732A (en)
NL (1) NL144029B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5122644B1 (en) * 1970-12-30 1976-07-12
JPS4997904A (en) * 1973-01-26 1974-09-17
US4160403A (en) * 1975-03-14 1979-07-10 Kinzo Takagi Variable delivery hydraulic equipment
JPS5281602A (en) * 1975-12-27 1977-07-08 Teijin Seiki Co Ltd Radial piston type liquid pump motor
CS212800B2 (en) * 1976-07-15 1982-03-26 Ivan J Cyphelly Delivery apparatus with hydrostatic torque transfer by cylindrical pistons
CH642147A5 (en) * 1979-05-18 1984-03-30 Glyco Antriebstechnik Gmbh DISPLACEMENT MACHINE WITH HYDROSTATIC TORQUE TRANSFER BY MEANS OF ROLLER PISTON.
WO2006037676A1 (en) * 2004-10-06 2006-04-13 Siemens Aktiengesellschaft Radial piston pump comprising a roller tappet
DE102007059435A1 (en) * 2007-12-10 2009-06-18 Linde Material Handling Gmbh Hydrostatic axial piston machine
US9677574B1 (en) 2013-09-12 2017-06-13 Hydro-Gear Limited Partnership Transmission assembly

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2155455A (en) * 1932-11-24 1939-04-25 Thoma Hans Hydraulic motor and pump
US2292181A (en) * 1940-05-20 1942-08-04 Hydraulic Dev Corp Inc Hydraulic pump or motor
US2528739A (en) * 1947-06-24 1950-11-07 Dowty Equipment Ltd High-pressure pump
US2815718A (en) * 1952-07-24 1957-12-10 Gen Electric Ball piston type fluid transmission
US2821145A (en) * 1956-11-23 1958-01-28 Oilgear Co Hydrostatically balanced driving connection
US3046950A (en) * 1958-01-22 1962-07-31 Whiting Corp Constant mechanical advantage rotary hydraulic device
US3073254A (en) * 1959-12-24 1963-01-15 United Aircraft Corp Pressure balanced pump
US3153987A (en) * 1960-06-29 1964-10-27 Thoma Hans Piston type hydrostatic power units
US3142262A (en) * 1960-08-31 1964-07-28 Council Scient Ind Res Pressure fluid pistons or plungers
DE1453433C3 (en) * 1962-06-20 1975-05-28 Breinlich, Richard, Dr., 7120 Bietigheim Hydraulic radial piston machine
US3228346A (en) * 1963-02-27 1966-01-11 Trw Inc Hydraulic apparatuses
GB1129293A (en) * 1965-02-11 1968-10-02 Nat Res Dev Improvements in or relating to ball piston hydrostatic pumps and motors
CH461277A (en) * 1967-07-07 1968-08-15 Von Roll Ag Axial piston unit

Also Published As

Publication number Publication date
NL6901744A (en) 1969-08-07
US3858487A (en) 1975-01-07
FR2001321A1 (en) 1969-09-26
NL144029B (en) 1974-11-15

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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