EP0174734A3 - Oil pumps - Google Patents

Oil pumps Download PDF

Info

Publication number
EP0174734A3
EP0174734A3 EP85305638A EP85305638A EP0174734A3 EP 0174734 A3 EP0174734 A3 EP 0174734A3 EP 85305638 A EP85305638 A EP 85305638A EP 85305638 A EP85305638 A EP 85305638A EP 0174734 A3 EP0174734 A3 EP 0174734A3
Authority
EP
European Patent Office
Prior art keywords
pump
output
oil pumps
rotor
journalled
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.)
Withdrawn
Application number
EP85305638A
Other languages
German (de)
French (fr)
Other versions
EP0174734A2 (en
Inventor
Robin Edward Child
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.)
Concentric Pumps Ltd
Original Assignee
Concentric Pumps 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 Concentric Pumps Ltd filed Critical Concentric Pumps Ltd
Publication of EP0174734A2 publication Critical patent/EP0174734A2/en
Publication of EP0174734A3 publication Critical patent/EP0174734A3/en
Withdrawn legal-status Critical Current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
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/18—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
    • F04C14/22—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members
    • F04C14/223—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members using a movable cam
    • 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
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

A gear pump has a variable output which is relatively ripple free by using a single common gear rotor meshed with a pair of individual annuli each mounted in a corresponding eccentric so that they can be turned in opposite directions. This not only reduces the output from each rotor part, by reducing the eccentricity, but puts the parts out of phase with one another. According to the invention the rings are journalled by needle roller bearings which avoids them jamming due to the forces involved within the pump.
EP85305638A 1984-09-08 1985-08-08 Oil pumps Withdrawn EP0174734A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8422755 1984-09-08
GB848422755A GB8422755D0 (en) 1984-09-08 1984-09-08 Oil pumps

Publications (2)

Publication Number Publication Date
EP0174734A2 EP0174734A2 (en) 1986-03-19
EP0174734A3 true EP0174734A3 (en) 1986-12-30

Family

ID=10566477

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85305638A Withdrawn EP0174734A3 (en) 1984-09-08 1985-08-08 Oil pumps

Country Status (4)

Country Link
EP (1) EP0174734A3 (en)
JP (1) JPH0681955B2 (en)
ES (1) ES8609606A1 (en)
GB (1) GB8422755D0 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8616488D0 (en) * 1986-07-07 1986-08-13 Concentric Controls Ltd Oil pump
GB8706630D0 (en) * 1987-03-20 1987-04-23 Concentric Pumps Ltd Variable output oil pump
FR2654160B1 (en) * 1989-11-09 1992-10-23 Lecocq Andre VARIABLE FLUID AND FLOW RATE MACHINE WITH GEARS.
GB2265946B (en) * 1992-04-08 1995-01-18 Concentric Pumps Ltd Improvements relating to pumps
US5544540A (en) * 1994-12-29 1996-08-13 Dana Corporation Gerotor pump for vehicle transmission lubrication system
DE10045893A1 (en) * 2000-09-16 2002-03-28 Zahnradfabrik Friedrichshafen hydraulic pump

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1964330A (en) * 1934-06-26 rotary pump
GB1426223A (en) * 1973-05-15 1976-02-25 Concentric Pumps Ltd Rotary positive-idsplacement pumps
EP0076033A1 (en) * 1981-09-03 1983-04-06 Concentric Pumps Limited Variable output internal gear pump

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4492539A (en) * 1981-04-02 1985-01-08 Specht Victor J Variable displacement gerotor pump

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1964330A (en) * 1934-06-26 rotary pump
GB1426223A (en) * 1973-05-15 1976-02-25 Concentric Pumps Ltd Rotary positive-idsplacement pumps
EP0076033A1 (en) * 1981-09-03 1983-04-06 Concentric Pumps Limited Variable output internal gear pump

Also Published As

Publication number Publication date
ES8609606A1 (en) 1986-07-16
JPH0681955B2 (en) 1994-10-19
GB8422755D0 (en) 1984-10-10
EP0174734A2 (en) 1986-03-19
ES546766A0 (en) 1986-07-16
JPS6181589A (en) 1986-04-25

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Legal Events

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18D Application deemed to be withdrawn

Effective date: 19870701

RIN1 Information on inventor provided before grant (corrected)

Inventor name: CHILD, ROBIN EDWARD