GB1376732A - Hydraulic pumps - Google Patents

Hydraulic pumps

Info

Publication number
GB1376732A
GB1376732A GB962971A GB962971A GB1376732A GB 1376732 A GB1376732 A GB 1376732A GB 962971 A GB962971 A GB 962971A GB 962971 A GB962971 A GB 962971A GB 1376732 A GB1376732 A GB 1376732A
Authority
GB
United Kingdom
Prior art keywords
delivery pressure
spring
piston
valve
delivery
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
GB962971A
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.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
Joseph Lucas Industries 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
Application filed by Lucas Industries Ltd, Joseph Lucas Industries Ltd filed Critical Lucas Industries Ltd
Priority to GB962971A priority Critical patent/GB1376732A/en
Priority to SE7204861A priority patent/SE7204861L/xx
Priority to DE19722218391 priority patent/DE2218391A1/en
Priority to JP47037835A priority patent/JPS512643B1/ja
Priority to FR7213472A priority patent/FR2136479A5/fr
Publication of GB1376732A publication Critical patent/GB1376732A/en
Expired 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
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/06—Control
    • F04B1/07—Control by varying the relative eccentricity between two members, e.g. a cam and a drive shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/06—Control
    • F04B1/08—Control regulated by delivery pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/12—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members
    • F04B49/123—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members by changing the eccentricity of one element relative to another element
    • F04B49/128—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members by changing the eccentricity of one element relative to another element by changing the eccentricity of the cylinders, e.g. by moving a cylinder block
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/24—Bypassing

Abstract

1376732 Reciprocating pumps JOSEPH LUCAS (INDUSTRIES) Ltd 12 April 1972 [16 April 1971] 9629/71 Heading F1A [Also in Division G3] In a radial cylinder pump comprising a rotary cylinder block 12, Fig.1, on a stationary pintle valve 11 and pistons 14 engaging a cam-ring 19 through slippers 20, the eccentricity of the camring is controlled in accordance with the delivery pressure by a piston 22 continuously subjected to delivery pressure, and a larger diameter piston 24 biased by a spring 25 and subjected to a control pressure from a valve 27, Fig.6, controlled by the delivery pressure. In operation, spring 25 initially biases cam-ring 19 to its maximum stroke position, and a spring 29 biases valve 27 to connect piston 24 to delivery pressure. When the delivery pressure exceeds a predetermined value, valve member 28 is moved against spring 29 and connects piston 24 to low pressure via valve bore 31, delivery pressure acting on piston 22 then reducing the cam-ring eccentricity. If the delivery pressure increases sufficiently to move the relieved portions of valve member 28 clear of shoulder 33, some of the pump delivery is discharged through the relieved portions to low pressure. The cylinder block 12 and drive-shaft 36 have respective pairs of projections (34), (37), Fig.2 (not shown) engaging a coupling member 35. The shaft seal assembly comprises annular members 42, 44 located by half-washers (39), (40) Fig.3 (not shown) and biased apart by a spring 46, and engaging sealing rings 47 and carbon face seals 48, 49. Leakage entering chamber 50 is drained through passage 51.
GB962971A 1971-04-16 1971-04-16 Hydraulic pumps Expired GB1376732A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB962971A GB1376732A (en) 1971-04-16 1971-04-16 Hydraulic pumps
SE7204861A SE7204861L (en) 1971-04-16 1972-04-14
DE19722218391 DE2218391A1 (en) 1971-04-16 1972-04-15 Radial piston pump
JP47037835A JPS512643B1 (en) 1971-04-16 1972-04-17
FR7213472A FR2136479A5 (en) 1971-04-16 1972-04-17

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB962971A GB1376732A (en) 1971-04-16 1971-04-16 Hydraulic pumps

Publications (1)

Publication Number Publication Date
GB1376732A true GB1376732A (en) 1974-12-11

Family

ID=9875683

Family Applications (1)

Application Number Title Priority Date Filing Date
GB962971A Expired GB1376732A (en) 1971-04-16 1971-04-16 Hydraulic pumps

Country Status (5)

Country Link
JP (1) JPS512643B1 (en)
DE (1) DE2218391A1 (en)
FR (1) FR2136479A5 (en)
GB (1) GB1376732A (en)
SE (1) SE7204861L (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3327978A1 (en) * 1983-08-03 1985-02-21 Mannesmann Rexroth GmbH, 8770 Lohr Arrangement for loading a pressure-medium accumulator
JPS62135208A (en) * 1985-12-05 1987-06-18 富士電機株式会社 Space heater for enclosed switchboard
GB8925592D0 (en) * 1989-11-13 1990-01-04 Hobourn Eng Ltd Positive displacement pump systems
DE10222131C5 (en) * 2002-05-17 2011-08-11 Schwäbische Hüttenwerke Automotive GmbH & Co. KG, 73433 Positive displacement pump with delivery volume adjustment

Also Published As

Publication number Publication date
DE2218391A1 (en) 1972-10-26
FR2136479A5 (en) 1972-12-22
SE7204861L (en) 1972-10-17
JPS512643B1 (en) 1976-01-28

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee