EP0242963A3 - Rotary positive displacement pump - Google Patents

Rotary positive displacement pump Download PDF

Info

Publication number
EP0242963A3
EP0242963A3 EP87302043A EP87302043A EP0242963A3 EP 0242963 A3 EP0242963 A3 EP 0242963A3 EP 87302043 A EP87302043 A EP 87302043A EP 87302043 A EP87302043 A EP 87302043A EP 0242963 A3 EP0242963 A3 EP 0242963A3
Authority
EP
European Patent Office
Prior art keywords
slot
land
outlet ports
opens
lobes
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Withdrawn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
EP87302043A
Other languages
German (de)
French (fr)
Other versions
EP0242963A2 (en
Inventor
Ian Trevor Bristow
Alec Thornelow
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.)
Hobourn Eaton Ltd
Original Assignee
Hobourn Eaton 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 Hobourn Eaton Ltd filed Critical Hobourn Eaton Ltd
Publication of EP0242963A2 publication Critical patent/EP0242963A2/en
Publication of EP0242963A3 publication Critical patent/EP0242963A3/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Withdrawn legal-status Critical Current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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Abstract

A gerotor or N(N+1) type pump comprises outer and inner lobed rotors 10, 11 defining pumping chambers 16 and has an inlet port 18 and two outlet ports 19, 20. Ports 19, 20 are separated from each other by a radially extending land 22. Between each pair of neighbouring lobes on the inner rotor 11 a radial slot 24 is formed which opens to the periphery of the rotor and extends inward a sufficient distance to overlap the two outlet ports 19, 20 radially when the said two lobes flank circumferentially opposite sides of the land 22. The circumferential extent of each slot 24 is sufficient to ensure that there is always a leakage path from the pumping chamber to which the slot opens to one or other of the two outlet ports as the slot passes the land 22.
EP87302043A 1986-03-14 1987-03-10 Rotary positive displacement pump Withdrawn EP0242963A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8606326 1986-03-14
GB868606326A GB8606326D0 (en) 1986-03-14 1986-03-14 Positive displacement pumps

Publications (2)

Publication Number Publication Date
EP0242963A2 EP0242963A2 (en) 1987-10-28
EP0242963A3 true EP0242963A3 (en) 1988-03-09

Family

ID=10594598

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87302043A Withdrawn EP0242963A3 (en) 1986-03-14 1987-03-10 Rotary positive displacement pump

Country Status (2)

Country Link
EP (1) EP0242963A3 (en)
GB (1) GB8606326D0 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3824686C2 (en) * 1987-08-03 1999-09-16 Jun White Rotary piston machine of the gerotor type
JPS6441686A (en) * 1987-08-06 1989-02-13 Giyuuji Negishi Trochoid pump
US20040101427A1 (en) * 2002-11-27 2004-05-27 Visteon Global Technologies Inc. Gerotor fuel pump having primary and secondary inlet and outlet portings
GB0620646D0 (en) * 2006-10-18 2006-11-29 Concentric Vfp Ltd Pumps with filling slots
WO2009130433A1 (en) * 2008-04-22 2009-10-29 Concentric Vfp Limited Pump with filling slots

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB681883A (en) * 1950-03-10 1952-10-29 Hobourn Eaton Mfg Co Ltd Improvements relating to internal gear pumps
GB1146913A (en) * 1965-07-09 1969-03-26 Germane Corp Rotary fluid pressure devices
DE1703573A1 (en) * 1967-07-21 1971-11-25 Reliance Electric & Eng Co Liquid engine
GB1407282A (en) * 1971-11-10 1975-09-24 Danfoss As Gerotor type rotary fluid-pressure machine
US4411607A (en) * 1980-04-23 1983-10-25 G. L. Rexroth Gmbh Internal gear machine with rotary pressure balanced valve disc
DE3243394A1 (en) * 1982-11-24 1984-05-24 Danfoss A/S, Nordborg PARALLEL AND INTERNAL AXIAL PISTON MACHINE

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB681883A (en) * 1950-03-10 1952-10-29 Hobourn Eaton Mfg Co Ltd Improvements relating to internal gear pumps
GB1146913A (en) * 1965-07-09 1969-03-26 Germane Corp Rotary fluid pressure devices
DE1703573A1 (en) * 1967-07-21 1971-11-25 Reliance Electric & Eng Co Liquid engine
GB1407282A (en) * 1971-11-10 1975-09-24 Danfoss As Gerotor type rotary fluid-pressure machine
US4411607A (en) * 1980-04-23 1983-10-25 G. L. Rexroth Gmbh Internal gear machine with rotary pressure balanced valve disc
DE3243394A1 (en) * 1982-11-24 1984-05-24 Danfoss A/S, Nordborg PARALLEL AND INTERNAL AXIAL PISTON MACHINE

Also Published As

Publication number Publication date
EP0242963A2 (en) 1987-10-28
GB8606326D0 (en) 1986-04-23

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Inventor name: BRISTOW, IAN TREVOR

Inventor name: THORNELOW, ALEC