GB1420417A - Spool valve assemblies - Google Patents

Spool valve assemblies

Info

Publication number
GB1420417A
GB1420417A GB1525773A GB1525773A GB1420417A GB 1420417 A GB1420417 A GB 1420417A GB 1525773 A GB1525773 A GB 1525773A GB 1525773 A GB1525773 A GB 1525773A GB 1420417 A GB1420417 A GB 1420417A
Authority
GB
United Kingdom
Prior art keywords
port
spool
motor
check valve
return
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
GB1525773A
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.)
Parker Hannifin Corp
Original Assignee
Parker Hannifin 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 Parker Hannifin Corp filed Critical Parker Hannifin Corp
Publication of GB1420417A publication Critical patent/GB1420417A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
    • F15B13/0403—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves a secondary valve member sliding within the main spool, e.g. for regeneration flow
    • 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
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
    • F16K11/0716—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides with fluid passages through the valve member
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87169—Supply and exhaust

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Multiple-Way Valves (AREA)
  • Operation Control Of Excavators (AREA)

Abstract

1420417 Valves PARKER-HANNIFIN CORP 29 March 1973 [19 April 1972] 15257/73 Heading F2V A spool valve for controlling a double acting fluid motor 8, e.g. for raising and lowering the boom 22 of a bulldozer or a front end loader, comprises an inlet port 3, a return port 5 and motor ports 7, and has its spool 10 provided with passage means therein. Upward movement of the spool from its neutral position shown causes the motor to lower the boom 22, actuating oil being delivered from pump 4 to the head end of the motor via port 3, lower check valve 15, spool groove 35 and lower port 7, and return oil from the rod end of the motor being delivered via upper port 7 and ports 25 into the interior of the spool where it can unseat check valve 30 and pass into lower passage 12 to supplement the pump output and thereby prevent cavitation at the motor head end. When the bulldozer blade 21 contacts the ground, consequent pressure build up at port 3 closes the check valve 30 whereafter the return oil builds up sufficient pressure to open a relief valve 23 and flows through upper passage 17 and port 5 to storage tank 6. Downward movement of the spool reverses the connections to the motor so that actuating oil is supplied to the motor via passages 28, 25, upper check valve 15 and upper port 7, and return oil passes through lower port 7, spool groove 35, lower passage 17 and port 5 to the tank 6. Raising of the spool beyond the "lower" position to the "float" position causes the motor ports 7 to be connected to the upper and lower return passages 17 via respective spool grooves 38, 37. A main relief valve 13 is provided.
GB1525773A 1972-04-19 1973-03-29 Spool valve assemblies Expired GB1420417A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24545172A 1972-04-19 1972-04-19

Publications (1)

Publication Number Publication Date
GB1420417A true GB1420417A (en) 1976-01-07

Family

ID=22926711

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1525773A Expired GB1420417A (en) 1972-04-19 1973-03-29 Spool valve assemblies

Country Status (7)

Country Link
US (1) US3746040A (en)
JP (1) JPS4920722A (en)
CA (1) CA988392A (en)
DE (1) DE2318845A1 (en)
FR (1) FR2181018B1 (en)
GB (1) GB1420417A (en)
IT (1) IT982728B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2156951A (en) * 1984-04-06 1985-10-16 Trans Nordic Limited Directional control spool valve

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8600320D0 (en) * 1986-01-08 1986-02-12 Trans Nordic Hydraulics Ltd Directional control spool valve
FR2593265B1 (en) * 1986-01-17 1988-04-22 Rexroth Sigma PRESSURE HYDRAULIC FLUID DISTRIBUTOR
US4840111A (en) * 1986-01-31 1989-06-20 Moog Inc. Energy-conserving regenerative-flow valves for hydraulic servomotors
JP2839625B2 (en) * 1990-03-05 1998-12-16 日立建機株式会社 Hydraulic drive
WO1998001678A1 (en) * 1996-07-05 1998-01-15 Parker Hannifin Gmbh Controller for a cylinder working on a single side
FR2753250B1 (en) * 1996-09-10 1998-11-13 Rexroth Sigma MULTI-PART DRAWER HYDRAULIC VALVE
US5992454A (en) * 1998-07-21 1999-11-30 Eaton Corporation Lower and float capability in four position control valve
EP2944828B1 (en) * 2013-08-19 2018-02-21 Jiangsu Hengli Hydraulic Co., Ltd. Energy-recycling hydraulic control main valve
US10816018B2 (en) 2017-08-03 2020-10-27 Kabushiki Kaisha Toyota Jidoshokki Hydraulic driving device of industrial vehicle

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2949097A (en) * 1957-12-11 1960-08-16 New York Air Brake Co Five position control valve having power float position
US2965133A (en) * 1959-01-08 1960-12-20 New York Air Brake Co Valve
US3482600A (en) * 1968-03-04 1969-12-09 Commercial Shearing Hollow slide valves

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2156951A (en) * 1984-04-06 1985-10-16 Trans Nordic Limited Directional control spool valve

Also Published As

Publication number Publication date
DE2318845A1 (en) 1973-10-31
FR2181018A1 (en) 1973-11-30
JPS4920722A (en) 1974-02-23
IT982728B (en) 1974-10-21
CA988392A (en) 1976-05-04
FR2181018B1 (en) 1978-02-17
US3746040A (en) 1973-07-17

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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