JPS57114761A - Steering demand valve - Google Patents

Steering demand valve

Info

Publication number
JPS57114761A
JPS57114761A JP56000507A JP50781A JPS57114761A JP S57114761 A JPS57114761 A JP S57114761A JP 56000507 A JP56000507 A JP 56000507A JP 50781 A JP50781 A JP 50781A JP S57114761 A JPS57114761 A JP S57114761A
Authority
JP
Japan
Prior art keywords
valve
port
flow
steering
working machine
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
JP56000507A
Other languages
Japanese (ja)
Other versions
JPS6358141B2 (en
Inventor
Masaaki Nakarai
Tadao Karakama
Kazuo Uehara
Kokichi Tominaga
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.)
Komatsu Ltd
Original Assignee
Komatsu Ltd
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 Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP56000507A priority Critical patent/JPS57114761A/en
Publication of JPS57114761A publication Critical patent/JPS57114761A/en
Publication of JPS6358141B2 publication Critical patent/JPS6358141B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Fluid-Pressure Circuits (AREA)
  • Power Steering Mechanism (AREA)

Abstract

PURPOSE: To obtain a small sized demand valve with less energy loss by incorporating a steering valve and a demand valve into one and by arranging the flow of a steering valve to join into a working machine circuit when a steering valve is in a neutral position.
CONSTITUTION: Demand valve body 3a houses spool 4a of demand valve 4 and spool 5a of steering valve in parallel relation each other. When a rotation of an engine exceeds the prescribed number, port 42 and working machine port 43 connects to each other in spool 4a and flow Q necessary for steering flows to valve 5 and excessive portion of flow joins to flow from pump 2 at port 43 and is supplied to a working machine circuit. While a steering valve is neutral, port 52, 53 connect to port 54 and discharged flow from pump 1 flows into port 4 to join with discharged flow from pump 2 and supplied to a working machine circuit.
COPYRIGHT: (C)1982,JPO&Japio
JP56000507A 1981-01-07 1981-01-07 Steering demand valve Granted JPS57114761A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56000507A JPS57114761A (en) 1981-01-07 1981-01-07 Steering demand valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56000507A JPS57114761A (en) 1981-01-07 1981-01-07 Steering demand valve

Publications (2)

Publication Number Publication Date
JPS57114761A true JPS57114761A (en) 1982-07-16
JPS6358141B2 JPS6358141B2 (en) 1988-11-15

Family

ID=11475675

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56000507A Granted JPS57114761A (en) 1981-01-07 1981-01-07 Steering demand valve

Country Status (1)

Country Link
JP (1) JPS57114761A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4751977A (en) * 1986-01-14 1988-06-21 Corint S.R.L. Power steering for motor vehicles with power assistance increased by means of an intermittently operating pump
WO2014097423A1 (en) * 2012-12-19 2014-06-26 株式会社 島津製作所 Hydraulic circuit and cargo-handling vehicle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4751977A (en) * 1986-01-14 1988-06-21 Corint S.R.L. Power steering for motor vehicles with power assistance increased by means of an intermittently operating pump
WO2014097423A1 (en) * 2012-12-19 2014-06-26 株式会社 島津製作所 Hydraulic circuit and cargo-handling vehicle
CN104870832A (en) * 2012-12-19 2015-08-26 株式会社岛津制作所 Hydraulic circuit and cargo-handling vehicle
JP5896041B2 (en) * 2012-12-19 2016-03-30 株式会社島津製作所 Hydraulic circuit and cargo handling vehicle

Also Published As

Publication number Publication date
JPS6358141B2 (en) 1988-11-15

Similar Documents

Publication Publication Date Title
JPS57154503A (en) Pressurized fluid feeder
JPS5549594A (en) Rotary hydraulic apparatus
JPS57949A (en) Servo-valve
JPS57193791A (en) Oil pump
JPS57114761A (en) Steering demand valve
JPS57176384A (en) Compressor
JPS5422068A (en) Control valve for machine
JPS5382933A (en) Variable venturi type carburetor
JPS55115605A (en) Flow distributing valve
JPS5586905A (en) Directional control valve with pressure compensation
JPS5620803A (en) Hydraulic circuit
JPS5620809A (en) Fluid control system
JPS5620806A (en) Fluid control system
JPS5586907A (en) Three-pump hydraulic circuit for construction machinery or the like
JPS56159584A (en) Oil pressure control circuit for construction machine
JPS5741490A (en) Pump device
JPS563722A (en) Hydraulic circuit of hydraulic shovel
JPS6483979A (en) Control valve for hot-water supply facility
JPS5751577A (en) Power steering device
JPS57177406A (en) Combind flow type flow control circuit capable of mode exchange
JPS5754704A (en) Hydraulic circuit
JPS5640913A (en) Flow rate control unit
JPS56113865A (en) Change-over valve
JPS5544160A (en) Piston-shaped four-way change-over valve
JPS5781536A (en) Turnable oil-pressure closed circuit for construction machinery