EP0822334A3 - Gear pump - Google Patents

Gear pump Download PDF

Info

Publication number
EP0822334A3
EP0822334A3 EP97112978A EP97112978A EP0822334A3 EP 0822334 A3 EP0822334 A3 EP 0822334A3 EP 97112978 A EP97112978 A EP 97112978A EP 97112978 A EP97112978 A EP 97112978A EP 0822334 A3 EP0822334 A3 EP 0822334A3
Authority
EP
European Patent Office
Prior art keywords
gear pump
hydraulic fluid
line
pressure
suction line
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.)
Granted
Application number
EP97112978A
Other languages
German (de)
French (fr)
Other versions
EP0822334B1 (en
EP0822334A2 (en
Inventor
Paul Lütkenhaus
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.)
Neudecker & Jolitz & Co GmbH
Original Assignee
Neudecker & Jolitz & Co GmbH
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 Neudecker & Jolitz & Co GmbH filed Critical Neudecker & Jolitz & Co GmbH
Publication of EP0822334A2 publication Critical patent/EP0822334A2/en
Publication of EP0822334A3 publication Critical patent/EP0822334A3/en
Application granted granted Critical
Publication of EP0822334B1 publication Critical patent/EP0822334B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04C14/24—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
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/50—Power-operated mechanisms for wings using fluid-pressure actuators

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

Die Erfindung bezieht sich auf eine hydraulische Zahnradpumpe, insbesondere für eine Türbetätigungsvorrichtung mit innenliegenden Zahnrädern, wobei mindestens ein Zahnrad mit einem Antrieb versehen ist, sowie mit einer Druckleitung für die zu fördernde hydraulische Flüssigkeit und einer Saugleitung für die angesaugte hydraulische Flüssigkeit, wobei ein Druckbegrenzungsventil vorgesehen ist, das je nach Zustand einen Bypasskanal zwischen der Druckleitung und der Saugleitung freigibt bzw. sperrt.

Figure 00000001
The invention relates to a hydraulic gear pump, in particular for a door actuation device with internal gears, at least one gear being provided with a drive, as well as with a pressure line for the hydraulic fluid to be conveyed and a suction line for the hydraulic fluid drawn in, a pressure limiting valve being provided which, depending on the condition, enables or blocks a bypass channel between the pressure line and the suction line.
Figure 00000001
EP97112978A 1996-08-02 1997-07-29 Gear pump Expired - Lifetime EP0822334B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19631202 1996-08-02
DE19631202A DE19631202A1 (en) 1996-08-02 1996-08-02 Hydraulic gear pump, in particular for a door operating device

Publications (3)

Publication Number Publication Date
EP0822334A2 EP0822334A2 (en) 1998-02-04
EP0822334A3 true EP0822334A3 (en) 1998-11-25
EP0822334B1 EP0822334B1 (en) 2003-09-17

Family

ID=7801575

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97112978A Expired - Lifetime EP0822334B1 (en) 1996-08-02 1997-07-29 Gear pump

Country Status (2)

Country Link
EP (1) EP0822334B1 (en)
DE (3) DE19631202A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19933864C2 (en) * 1999-07-23 2003-05-28 Neudecker & Jolitz Gmbh & Co Door Opener
CN111119637A (en) * 2019-12-23 2020-05-08 北京电子工程总体研究所 Pneumatic cabin body door cover opening mechanism

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2758548A (en) * 1950-08-24 1956-08-14 Edward A Rockwell Rotary fluid displacement device and mechanism therefor
US3671143A (en) * 1970-11-05 1972-06-20 Trw Inc Flat side valve for pressure balanced power steering pump with improved aspirator action
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
DE3225549A1 (en) * 1982-07-08 1984-01-12 Robert Bosch Gmbh, 7000 Stuttgart Pump, in particular for feeding fuel for internal combustion engines
EP0301886A2 (en) * 1987-07-29 1989-02-01 HYDRECO, INC. (a Delaware corporation) Variable discharge gear pump with energy recovery
US5397219A (en) * 1993-06-21 1995-03-14 C. Cretors & Company Integral liquid pump and drainback valve
DE4444819A1 (en) * 1994-12-15 1996-06-20 Bayerische Motoren Werke Ag Lubricating oil pump for IC engine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3320596A1 (en) * 1983-06-08 1984-01-05 Neudecker & Jolitz GmbH & Co KG, 4423 Gescher Compact motor-pump unit comprising electric motor and externally toothed gear pump complete in one housing
DD221798A1 (en) * 1984-03-12 1985-05-02 Schwermasch Liebknecht Veb K GEAR PUMP WITH INTEGRATED OVERPRESSURE VALVE
US4828462A (en) * 1987-12-10 1989-05-09 Dana Corporation Pressure detecting system for a hydraulic device
DE4441505A1 (en) * 1994-11-22 1996-05-23 Bosch Gmbh Robert Fuel feed pump for a fuel injection pump for internal combustion engines

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2758548A (en) * 1950-08-24 1956-08-14 Edward A Rockwell Rotary fluid displacement device and mechanism therefor
US3671143A (en) * 1970-11-05 1972-06-20 Trw Inc Flat side valve for pressure balanced power steering pump with improved aspirator action
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
DE3225549A1 (en) * 1982-07-08 1984-01-12 Robert Bosch Gmbh, 7000 Stuttgart Pump, in particular for feeding fuel for internal combustion engines
EP0301886A2 (en) * 1987-07-29 1989-02-01 HYDRECO, INC. (a Delaware corporation) Variable discharge gear pump with energy recovery
US5397219A (en) * 1993-06-21 1995-03-14 C. Cretors & Company Integral liquid pump and drainback valve
DE4444819A1 (en) * 1994-12-15 1996-06-20 Bayerische Motoren Werke Ag Lubricating oil pump for IC engine

Also Published As

Publication number Publication date
EP0822334B1 (en) 2003-09-17
DE29713614U1 (en) 1997-10-30
DE19631202A1 (en) 1998-02-05
EP0822334A2 (en) 1998-02-04
DE59710749D1 (en) 2003-10-23

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