GB1280447A - Positive displacement pump - Google Patents

Positive displacement pump

Info

Publication number
GB1280447A
GB1280447A GB57675/70A GB5767570A GB1280447A GB 1280447 A GB1280447 A GB 1280447A GB 57675/70 A GB57675/70 A GB 57675/70A GB 5767570 A GB5767570 A GB 5767570A GB 1280447 A GB1280447 A GB 1280447A
Authority
GB
United Kingdom
Prior art keywords
fluid
valve
pressure
orifice
pump
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
GB57675/70A
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.)
Ford Motor Co Ltd
Ford Motor Co
Original Assignee
Ford Motor Co Ltd
Ford Motor Co
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 Ford Motor Co Ltd, Ford Motor Co filed Critical Ford Motor Co Ltd
Publication of GB1280447A publication Critical patent/GB1280447A/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
    • 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
    • F04C15/062—Arrangements for supercharging the working space
    • 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
    • F04C14/24—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
    • F04C14/26—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels
    • 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
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C2/3446—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along more than one line or surface

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)
  • Reciprocating Pumps (AREA)

Abstract

1280447 Rotary positive-displacement pumps FORD MOTOR CO Ltd 4 Dec 1970 [24 Dec 1969] 57675/70 Heading F1F In a double-acting rotary positive displacement pump of the radially outwardly-sliding "slipper" type for a vehicle power-assisted steering system, the pressure fluid output flow to the power steering motor, or servo, (not shown) is by way of a fluid control valve orifice 76 and a pressure control bypass valve 38 carrying a tapered needle valve 90 which on fluid-pressure increase progressively restricts the flow such that the greater the amount of restriction the higher the rate of pressure build-up on the valve 88 side of the orifice 76 to move the valve 88 against a spring 86 restricting the flow from the outlet chamber 70 through the orifice 76 to the net output flow to a passage 78, connected to the pump outlet conduit, at a value determined by the calibration of the needle valve 90, the outlet pressure in passage 78 being determined by the spring 86 because of the action of a second orifice 80 whereby if this pressure exceeds a predetermined value a balancing pressure via the orifice 80 and a cross-over duct 82 unseats a spring-loaded ball valve 92 to by-pass pressure fluid to a chamber 94, surrounding the valve 88, the chamber 94 communicating with a nozzle 96 whereby the by-pass flow is accelerated through an internal feed passage 98 communicating with a reservoir 100 whereby fluid is drawn from the reservoir by the aspirator action developed by the accelerated fluid in the feed passage 98 which supercharges the fluid in an annular inlet port chamber 64, the supercharging action additionally serving to prevent pump cavitation. The rotor 36 of the pump is fast on an engine driven shaft 20 and carries a number of spring-loaded slippers 48 arranged in pockets 50 of the rotor and engaging an elliptic cam track of a fixed cam plate which forms two arcuate working spaces 44, 46 defining the pumping chamber between end-plates 16, 26, diametrically oppositely arranged inlet and outlet ports 60, 62 and 54, 56 being formed in the adjacent pump casing 10 semi-isolated from the pump rotor 36.
GB57675/70A 1969-12-24 1970-12-04 Positive displacement pump Expired GB1280447A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US88795069A 1969-12-24 1969-12-24

Publications (1)

Publication Number Publication Date
GB1280447A true GB1280447A (en) 1972-07-05

Family

ID=25392200

Family Applications (1)

Application Number Title Priority Date Filing Date
GB57675/70A Expired GB1280447A (en) 1969-12-24 1970-12-04 Positive displacement pump

Country Status (6)

Country Link
US (1) US3614266A (en)
JP (1) JPS5125923B1 (en)
CA (1) CA935329A (en)
DE (1) DE2054407C3 (en)
FR (1) FR2074206A5 (en)
GB (1) GB1280447A (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3806273A (en) * 1971-10-06 1974-04-23 Trw Inc Pump with means for supercharging the pump inlet
JPS5545912Y2 (en) * 1975-07-25 1980-10-28
FR2393956A2 (en) * 1977-06-07 1979-01-05 Hydro Meca Gear pump for power assisted steering system - has delivery valve with sprung piston to control volume of oil flow
US4213744A (en) * 1978-03-03 1980-07-22 Eaton Corporation Hydraulic pump and improved by-pass flow means therefor
US4207038A (en) * 1978-05-01 1980-06-10 Ford Motor Company Power steering pump
GB2046953B (en) * 1979-03-22 1983-02-23 Trw Inc Fluid flow control
US4471907A (en) * 1979-06-01 1984-09-18 Amtrol Inc. Venturi pressurizer for incompressible-liquid circulating systems
US4251193A (en) * 1979-09-27 1981-02-17 General Motors Corporation Flow control valve
US4373871A (en) * 1981-05-04 1983-02-15 General Motors Corporation Compact power steering pump
US4643269A (en) * 1985-10-10 1987-02-17 Ford Motor Company Power steering system for an automotive vehicle having a power steering pump cut out circuit
DE3603148A1 (en) * 1986-02-01 1987-08-13 Rexroth Mannesmann Gmbh Hydraulic pump, in particular steering booster pump
DE4138516A1 (en) * 1991-11-23 1993-05-27 Luk Fahrzeug Hydraulik PUMP
KR0130912Y1 (en) * 1995-12-27 1999-01-15 조봉현 Vane pump
US8235682B2 (en) * 2006-06-24 2012-08-07 Ixetic Bad Homburg Gmbh Pump including an insertion valve sleeve having at least one orifice
DE102011084405B4 (en) * 2011-10-13 2021-05-27 Zf Friedrichshafen Ag Suction-charged pump for pumping a liquid

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA654271A (en) * 1962-12-18 B. Zeigler Philip Pump
US2983226A (en) * 1953-01-16 1961-05-09 William T Livermore Injection filled liquid pump
US2887060A (en) * 1953-06-22 1959-05-19 American Brake Shoe Co Variable volume pumping mechanism
US2858766A (en) * 1955-09-19 1958-11-04 Gen Motors Corp Supercharging pump

Also Published As

Publication number Publication date
US3614266A (en) 1971-10-19
DE2054407A1 (en) 1971-07-01
DE2054407C3 (en) 1981-06-25
DE2054407B2 (en) 1980-11-06
FR2074206A5 (en) 1971-10-01
CA935329A (en) 1973-10-16
JPS5125923B1 (en) 1976-08-03

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee