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FR2398202A1 - CONTROL VALVE FOR AGRICULTURAL MACHINE - Google Patents

CONTROL VALVE FOR AGRICULTURAL MACHINE

Info

Publication number
FR2398202A1
FR2398202A1 FR7821259A FR7821259A FR2398202A1 FR 2398202 A1 FR2398202 A1 FR 2398202A1 FR 7821259 A FR7821259 A FR 7821259A FR 7821259 A FR7821259 A FR 7821259A FR 2398202 A1 FR2398202 A1 FR 2398202A1
Authority
FR
France
Prior art keywords
chamber
control valve
port
agricultural machine
orifice
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
FR7821259A
Other languages
French (fr)
Other versions
FR2398202B1 (en
Inventor
Hirokatsu Sakamoto
Masao Ohhashi
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.)
Iseki Agricultural Machinery Mfg Co Ltd
Original Assignee
Iseki Agricultural Machinery Mfg Co 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 Iseki Agricultural Machinery Mfg Co Ltd filed Critical Iseki Agricultural Machinery Mfg Co Ltd
Publication of FR2398202A1 publication Critical patent/FR2398202A1/en
Application granted granted Critical
Publication of FR2398202B1 publication Critical patent/FR2398202B1/fr
Granted 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
    • F15B13/01—Locking-valves or other detent i.e. load-holding devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Lifting Devices For Agricultural Implements (AREA)

Abstract

Soupape de commande permettant de commander hydrauliquement les opérations de levage d'une machine de travail telle qu'une machine rotative, une charrue, etc., reliée à une machine motrice agricole telle qu'un tracteur. La soupape d'inversion étant réglée dans sa position ascendante, l'orifice 28 est fermé tandis que l'orifice 29 est ouvert et la chambre 10 communique avec la chambre 12 à travers l'orifice 11, de sorte que l'huile hydraulique dans la chambre 10 circule à travers l'orifice 11, la chambre 12, le passage 24, l'orifice 29, la chambre 32 et le passage 25 de maniere à entrer dans la chambre 31, la pression dans cette chambre 31 étant ainsi rendue égale à celle dans la chambre 30. Application aux machines agricoles.Control valve for hydraulically controlling the lifting operations of a working machine such as a rotary machine, a plow, etc., connected to an agricultural prime mover such as a tractor. With the reversing valve set in its upward position, port 28 is closed while port 29 is open and chamber 10 communicates with chamber 12 through port 11, so that hydraulic oil in the chamber 10 circulates through the orifice 11, the chamber 12, the passage 24, the orifice 29, the chamber 32 and the passage 25 so as to enter the chamber 31, the pressure in this chamber 31 thus being made equal to that in room 30. Application to agricultural machinery.

FR7821259A 1977-07-19 1978-07-18 CONTROL VALVE FOR AGRICULTURAL MACHINE Granted FR2398202A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8697977A JPS5422070A (en) 1977-07-19 1977-07-19 Control valve for machine

Publications (2)

Publication Number Publication Date
FR2398202A1 true FR2398202A1 (en) 1979-02-16
FR2398202B1 FR2398202B1 (en) 1983-12-16

Family

ID=13901980

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7821259A Granted FR2398202A1 (en) 1977-07-19 1978-07-18 CONTROL VALVE FOR AGRICULTURAL MACHINE

Country Status (5)

Country Link
JP (1) JPS5422070A (en)
CA (1) CA1120827A (en)
DE (1) DE2831515C2 (en)
FR (1) FR2398202A1 (en)
GB (1) GB2001516B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5648982B2 (en) * 1973-10-19 1981-11-19

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2723854A1 (en) * 1976-05-26 1977-12-08 Borg Warner LOAD-BEARING FLOW SYSTEM

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3035610A (en) * 1959-09-10 1962-05-22 Oliver Corp Control valve for hydraulic actuator
JPS4825199U (en) * 1971-07-31 1973-03-24
DE2449599A1 (en) * 1974-10-18 1976-04-29 Bosch Gmbh Robert Path valve for single-acting consumer - has relief channel connected to second path valve by spring loaded valve

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2723854A1 (en) * 1976-05-26 1977-12-08 Borg Warner LOAD-BEARING FLOW SYSTEM
US4088151A (en) * 1976-05-26 1978-05-09 Borg-Warner Corporation Cylinder locking apparatus

Also Published As

Publication number Publication date
JPS6257843B2 (en) 1987-12-03
CA1120827A (en) 1982-03-30
DE2831515C2 (en) 1986-11-06
FR2398202B1 (en) 1983-12-16
GB2001516A (en) 1979-02-07
GB2001516B (en) 1982-02-10
DE2831515A1 (en) 1979-02-22
JPS5422070A (en) 1979-02-19

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Legal Events

Date Code Title Description
ST Notification of lapse