US3522999A - Pump unloading valve - Google Patents

Pump unloading valve Download PDF

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Publication number
US3522999A
US3522999A US774309A US3522999DA US3522999A US 3522999 A US3522999 A US 3522999A US 774309 A US774309 A US 774309A US 3522999D A US3522999D A US 3522999DA US 3522999 A US3522999 A US 3522999A
Authority
US
United States
Prior art keywords
valve
pump
pressure
engine
valve member
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 - Lifetime
Application number
US774309A
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English (en)
Inventor
Clarence E Liles
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.)
White Motor Corp
Original Assignee
White Motor Corp
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 White Motor Corp filed Critical White Motor Corp
Application granted granted Critical
Publication of US3522999A publication Critical patent/US3522999A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/20—Excess-flow valves
    • F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
    • F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
    • F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
    • F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded

Definitions

  • FIG. 2 shows how the bypass valve 10 may be incorporated into the structure of a pressure-compensated radial-piston hydraulic pump.
  • FIG. 2 shows in cross section the high pressure manifold 12 in the cylinder block 14 of the pump and further shows an inclined bore 15 that communicates with the low pressure intake manifold (not shown) of the pump.
  • the pump may be pressure-compen sated by variably restricting the intake flow of the pump in response to pressure changes in the high pressure manifold 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Safety Valves (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Control Of Fluid Gearings (AREA)
  • Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
US774309A 1968-11-08 1968-11-08 Pump unloading valve Expired - Lifetime US3522999A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US77430968A 1968-11-08 1968-11-08

Publications (1)

Publication Number Publication Date
US3522999A true US3522999A (en) 1970-08-04

Family

ID=25100857

Family Applications (1)

Application Number Title Priority Date Filing Date
US774309A Expired - Lifetime US3522999A (en) 1968-11-08 1968-11-08 Pump unloading valve

Country Status (4)

Country Link
US (1) US3522999A (de)
DE (1) DE1936104C3 (de)
FR (1) FR2022833A1 (de)
GB (1) GB1229092A (de)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3704588A (en) * 1971-04-01 1972-12-05 Eaton Corp Acceleration control valve
US3889709A (en) * 1972-10-10 1975-06-17 Massey Ferguson Inc Hydraulic unloading valve
US3901628A (en) * 1973-06-01 1975-08-26 Rexroth Gmbh G L Hydraulic pump with air vent valve
US4017221A (en) * 1976-02-27 1977-04-12 Caterpillar Tractor Co. Combined unloading and relief valve for pump unloading circuit
US4138202A (en) * 1976-12-03 1979-02-06 Eller J Marlin Hydraulic motor system for driving a submersible impeller pump in which reversal of hydraulic flow is prevented
US4249558A (en) * 1978-11-09 1981-02-10 Deere & Company Bypass valve
US4308720A (en) * 1979-11-13 1982-01-05 Pneumo Corporation Linear engine/hydraulic pump
US4633836A (en) * 1982-12-07 1987-01-06 Robert Bosch Gmbh Method and apparatus for injecting fuel to attain a smooth combustion in a combustion engine
US4922715A (en) * 1986-12-09 1990-05-08 Honda Giken Kogyo Kabushiki Kaisha Hydraulically operated continuously variable transmission
DE4025992A1 (de) * 1989-08-17 1991-02-21 Toyoda Automatic Loom Works Antriebsbelastungs-steuereinrichtung fuer eine verdraengungsvariable-hydraulikpumpe
US5180291A (en) * 1992-04-27 1993-01-19 General Motors Corporation Pulsating oil injector for radial refrigerant compressor
US5412948A (en) * 1992-10-23 1995-05-09 Honda Giken Kogyo Kabushiki Kaisha Hydrostatic continuously variable transmission
US5718255A (en) * 1997-01-09 1998-02-17 Generac Corporation Flow-responsive diverting valve
US6935454B1 (en) 2003-09-18 2005-08-30 Hydro-Gear Limited Partnership Valve for a hydraulic drive apparatus
US7066199B1 (en) 2002-04-03 2006-06-27 Hydro-Gear Limited Partnership Valve assembly
US20060260302A1 (en) * 2005-05-23 2006-11-23 Shigenori Sakikawa Neutral valve structure
US7146809B1 (en) 2003-09-18 2006-12-12 Hydro-Gear Limited Partnership Valve for a hydraulic drive apparatus
US7320334B1 (en) 2002-04-03 2008-01-22 Hydro-Gear Limited Partnership Valve Assembly
US20100074767A1 (en) * 2008-09-24 2010-03-25 Caterpillar Inc. Hydraulic pump system with reduced cold start parasitic loss
AT511148A3 (de) * 2011-02-16 2015-03-15 Deere & Co Arbeitsfahrzeug, arbeitsmaschine und verfahren zur reduktion parasitärer lasten während des anlaufens

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2450407A1 (fr) * 1979-03-01 1980-09-26 Gromelle Raymond Raccord pneumatique de securite pour conteneur de gaz comprime ou analogue
GB8623556D0 (en) * 1986-10-01 1986-11-05 Massey Ferguson Mfg Hydraulic unloading valves
DE102004059820A1 (de) * 2004-12-03 2006-06-14 Kässbohrer Geländefahrzeug AG Antriebssystem für ein Fahrzeug

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2329491A (en) * 1942-04-14 1943-09-14 Western Electric Co Test device
US2747598A (en) * 1951-07-31 1956-05-29 Shell Dev Liquid-dispensing system with remote control
US3180266A (en) * 1963-06-27 1965-04-27 Ingersoll Rand Co Hydraulic computer for pump by-pass control
US3253607A (en) * 1964-06-10 1966-05-31 Trw Inc Combination pump and flow regulator
US3313530A (en) * 1965-05-20 1967-04-11 Acf Ind Inc Accelerator pump having thermostatic element
US3349714A (en) * 1965-10-11 1967-10-31 Ford Motor Co Power steering pump
US3396663A (en) * 1966-09-15 1968-08-13 Gen Motors Corp Liquid pump
US3415194A (en) * 1966-09-16 1968-12-10 Eaton Yale & Towne Pump

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2329491A (en) * 1942-04-14 1943-09-14 Western Electric Co Test device
US2747598A (en) * 1951-07-31 1956-05-29 Shell Dev Liquid-dispensing system with remote control
US3180266A (en) * 1963-06-27 1965-04-27 Ingersoll Rand Co Hydraulic computer for pump by-pass control
US3253607A (en) * 1964-06-10 1966-05-31 Trw Inc Combination pump and flow regulator
US3313530A (en) * 1965-05-20 1967-04-11 Acf Ind Inc Accelerator pump having thermostatic element
US3349714A (en) * 1965-10-11 1967-10-31 Ford Motor Co Power steering pump
US3396663A (en) * 1966-09-15 1968-08-13 Gen Motors Corp Liquid pump
US3415194A (en) * 1966-09-16 1968-12-10 Eaton Yale & Towne Pump

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3704588A (en) * 1971-04-01 1972-12-05 Eaton Corp Acceleration control valve
US3889709A (en) * 1972-10-10 1975-06-17 Massey Ferguson Inc Hydraulic unloading valve
US3901628A (en) * 1973-06-01 1975-08-26 Rexroth Gmbh G L Hydraulic pump with air vent valve
US4017221A (en) * 1976-02-27 1977-04-12 Caterpillar Tractor Co. Combined unloading and relief valve for pump unloading circuit
US4138202A (en) * 1976-12-03 1979-02-06 Eller J Marlin Hydraulic motor system for driving a submersible impeller pump in which reversal of hydraulic flow is prevented
US4249558A (en) * 1978-11-09 1981-02-10 Deere & Company Bypass valve
US4308720A (en) * 1979-11-13 1982-01-05 Pneumo Corporation Linear engine/hydraulic pump
US4633836A (en) * 1982-12-07 1987-01-06 Robert Bosch Gmbh Method and apparatus for injecting fuel to attain a smooth combustion in a combustion engine
US4922715A (en) * 1986-12-09 1990-05-08 Honda Giken Kogyo Kabushiki Kaisha Hydraulically operated continuously variable transmission
DE4025992A1 (de) * 1989-08-17 1991-02-21 Toyoda Automatic Loom Works Antriebsbelastungs-steuereinrichtung fuer eine verdraengungsvariable-hydraulikpumpe
US5180291A (en) * 1992-04-27 1993-01-19 General Motors Corporation Pulsating oil injector for radial refrigerant compressor
US5412948A (en) * 1992-10-23 1995-05-09 Honda Giken Kogyo Kabushiki Kaisha Hydrostatic continuously variable transmission
US5718255A (en) * 1997-01-09 1998-02-17 Generac Corporation Flow-responsive diverting valve
US7066199B1 (en) 2002-04-03 2006-06-27 Hydro-Gear Limited Partnership Valve assembly
US7320334B1 (en) 2002-04-03 2008-01-22 Hydro-Gear Limited Partnership Valve Assembly
US7316114B1 (en) 2003-09-18 2008-01-08 Hydro-Gear Limited Partnership Valve for a hydraulic drive apparatus
US6968684B1 (en) 2003-09-18 2005-11-29 Hydro-Gear Limited Partnership Valve for a hydraulic drive apparatus
US6935454B1 (en) 2003-09-18 2005-08-30 Hydro-Gear Limited Partnership Valve for a hydraulic drive apparatus
US7146809B1 (en) 2003-09-18 2006-12-12 Hydro-Gear Limited Partnership Valve for a hydraulic drive apparatus
US20060260302A1 (en) * 2005-05-23 2006-11-23 Shigenori Sakikawa Neutral valve structure
JP2006329213A (ja) * 2005-05-23 2006-12-07 Kanzaki Kokyukoki Mfg Co Ltd 中立バルブ構造
US7523610B2 (en) * 2005-05-23 2009-04-28 Kanzaki Kokyukoki Mfg. Co., Ltd. Neutral valve structure
US20090178400A1 (en) * 2005-05-23 2009-07-16 Shigenori Sakikawa Neutral Valve Structure
US20100074767A1 (en) * 2008-09-24 2010-03-25 Caterpillar Inc. Hydraulic pump system with reduced cold start parasitic loss
US8096781B2 (en) 2008-09-24 2012-01-17 Caterpillar Inc. Hydraulic pump system with reduced cold start parasitic loss
AT511148A3 (de) * 2011-02-16 2015-03-15 Deere & Co Arbeitsfahrzeug, arbeitsmaschine und verfahren zur reduktion parasitärer lasten während des anlaufens

Also Published As

Publication number Publication date
FR2022833A1 (de) 1970-08-07
GB1229092A (de) 1971-04-21
DE1936104A1 (de) 1971-02-04
DE1936104B2 (de) 1974-05-02
DE1936104C3 (de) 1974-12-05

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