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GB1229537A - - Google Patents

Info

Publication number
GB1229537A
GB1229537A GB1229537DA GB1229537A GB 1229537 A GB1229537 A GB 1229537A GB 1229537D A GB1229537D A GB 1229537DA GB 1229537 A GB1229537 A GB 1229537A
Authority
GB
United Kingdom
Prior art keywords
pump
voltage
workpiece
amplifier
supplied
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
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 filed Critical
Publication of GB1229537A publication Critical patent/GB1229537A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/02—Driving main working members
    • B23Q5/027—Driving main working members reciprocating members
    • B23Q5/033—Driving main working members reciprocating members driven essentially by fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/46—Automatic regulation in accordance with output requirements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/46—Automatic regulation in accordance with output requirements
    • F16H61/47—Automatic regulation in accordance with output requirements for achieving a target output speed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S60/00—Power plants
    • Y10S60/911—Fluid motor system incorporating electrical system

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Fluid Gearings (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Types And Forms Of Lifts (AREA)

Abstract

1,229,537. Hydraulic motor control circuits. HYDREL A. G. July 11, 1969 [Sept. 10, 1968], No. 34997/69. Heading F1P. A hydraulic motor 4 for reciprocating a workpiece 22 is supplied by a variable reversible delivery pump 1 and the workpiece has adjustable cam members 23, 24 which during predetermined portions of the stroke abut a feeler 25 mechanically connected to an electric control means e.g., a potentiometer 26 in circuit with an amplifier 9 and with the solenoid of a hydraulic valve 5 through which is supplied by an auxiliary pump 7 delivering through a line 6 fluid to actuate the stroke varying and reversing means of the main pump 1 which thus responds to the varying voltage in the electric circuit. The amplifier 9 is contained in an electronic device provided with voltage see-saw means 28 which serves to skip the zero voltage point just before it is reached and to swing over directly to the corresponding voltage valve for increased pump delivery.
GB1229537D 1968-09-10 1969-07-11 Expired GB1229537A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1369068A CH477630A (en) 1968-09-10 1968-09-10 At least approximately load-independent accuracy reversal on a hydraulic power drive for alternating movements of a work organ, for example in machine tools and elevators

Publications (1)

Publication Number Publication Date
GB1229537A true GB1229537A (en) 1971-04-21

Family

ID=4394507

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1229537D Expired GB1229537A (en) 1968-09-10 1969-07-11

Country Status (8)

Country Link
US (1) US3593519A (en)
JP (1) JPS4945669B1 (en)
AT (1) AT293820B (en)
CH (1) CH477630A (en)
DE (1) DE6918885U (en)
FR (1) FR2017998A1 (en)
GB (1) GB1229537A (en)
SE (1) SE370892B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5133061U (en) * 1974-08-30 1976-03-11
DE3710028A1 (en) * 1987-03-27 1988-10-06 Delmag Maschinenfabrik PRESSURE DRIVER
EP0319089B1 (en) * 1987-11-28 1995-03-15 Hitachi Construction Machinery Co., Ltd. Safety device for hydraulic closed circuit
US6145312A (en) 1998-12-30 2000-11-14 Hydro-Gear Limited Partnership Electro-mechanical bypass for hydrostatic transmission
US6735943B1 (en) 1998-12-30 2004-05-18 Hydro-Gear Limited Partnership Bypass for a hydraulic device
US7007467B1 (en) * 1998-12-30 2006-03-07 Hydro-Gear Limited Partnership Bypass for a hydraulic device
US7275371B1 (en) 1998-12-30 2007-10-02 Hydro-Gear Limited Patnership Bypass for a hydraulic device
US6430923B1 (en) * 2000-08-18 2002-08-13 Sauer-Danfoss Inc. Loop flushing circuit
US6672843B1 (en) 2002-04-08 2004-01-06 Hydro-Gear Limited Partnership Dual pump apparatus comprising dual drive shafts and auxiliary pump
US6953327B1 (en) 2003-03-11 2005-10-11 Hydro-Gear Limited Partnership Dual pump
US20040187491A1 (en) * 2003-03-26 2004-09-30 Whitaker James S. Pump with hot oil shuttle valve
US8205444B2 (en) * 2008-10-21 2012-06-26 Caterpillar Inc. Hydrostatic pump and motor with improved torque reversal characteristics

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1948951A (en) * 1929-08-21 1934-02-27 Walker Brooks Hydraulic power unit
US2299686A (en) * 1940-01-15 1942-10-20 Hydraulic Dev Corp Inc Hydraulic press
US2324727A (en) * 1941-01-10 1943-07-20 Vickers Inc Power transmission
US2419563A (en) * 1942-12-11 1947-04-29 Hydraulic Dev Corp Inc Hydraulic press for stepwise drawing of metal
US2388369A (en) * 1944-10-30 1945-11-06 Shendrick Constantine Fluid control valve

Also Published As

Publication number Publication date
FR2017998A1 (en) 1970-05-29
CH477630A (en) 1969-08-31
JPS4945669B1 (en) 1974-12-05
DE1923740A1 (en) 1970-03-19
AT293820B (en) 1971-10-25
DE6918885U (en) 1974-01-17
US3593519A (en) 1971-07-20
SE370892B (en) 1974-11-04
DE1923740B2 (en) 1972-09-21

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee