JPS5690103A - Controlling valve for farm working machinery of agricultural tractor - Google Patents

Controlling valve for farm working machinery of agricultural tractor

Info

Publication number
JPS5690103A
JPS5690103A JP16596079A JP16596079A JPS5690103A JP S5690103 A JPS5690103 A JP S5690103A JP 16596079 A JP16596079 A JP 16596079A JP 16596079 A JP16596079 A JP 16596079A JP S5690103 A JPS5690103 A JP S5690103A
Authority
JP
Japan
Prior art keywords
valve
hollow part
seat surface
diameter
check valve
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.)
Pending
Application number
JP16596079A
Other languages
Japanese (ja)
Inventor
Hidekazu Nakazato
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.)
KYB Corp
Original Assignee
Kayaba Industry 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 Kayaba Industry Co Ltd filed Critical Kayaba Industry Co Ltd
Priority to JP16596079A priority Critical patent/JPS5690103A/en
Publication of JPS5690103A publication Critical patent/JPS5690103A/en
Pending legal-status Critical Current

Links

Landscapes

  • Lifting Devices For Agricultural Implements (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE: To reduce the operating force needed for controlling a farm working machinery of an agricultural tractor as well as leakage from the cylinder passage by providing a hollow part at the rear end of the first check valve in order to separate the valve head from the seat surface at the neutral position and specifying the dimension relationship between the outside diameter of the hollow part and other parts.
CONSTITUTION: Into a valve hole 14 in a controlling valve main body 10, a valve head 43a and the first check valve 43 are movably inserted, and at the rear end of the first check valve 43 a hollow part 43b is provided. At the rear end of the valve hole 14 a hollow seat member 44 is provided so that the hollow part 43b is movably inserted therein. At the neutral position, the valve head 43a and a seat surface 44a are separated from each other. When there is leakage, however, the valve head 43a and the seat surface 44a are to contact with each other finally. In addition, the diameter D1 of the seat surface 44a, the diameter D3 of the base part of the check valve 43 and the diameter D2 of the hollow part 43b are formed so that their relationship to each other is D1>D2=D3, in order to reduce the force needed for operation and leakage from a cylinder passage 12.
COPYRIGHT: (C)1981,JPO&Japio
JP16596079A 1979-12-20 1979-12-20 Controlling valve for farm working machinery of agricultural tractor Pending JPS5690103A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16596079A JPS5690103A (en) 1979-12-20 1979-12-20 Controlling valve for farm working machinery of agricultural tractor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16596079A JPS5690103A (en) 1979-12-20 1979-12-20 Controlling valve for farm working machinery of agricultural tractor

Publications (1)

Publication Number Publication Date
JPS5690103A true JPS5690103A (en) 1981-07-22

Family

ID=15822280

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16596079A Pending JPS5690103A (en) 1979-12-20 1979-12-20 Controlling valve for farm working machinery of agricultural tractor

Country Status (1)

Country Link
JP (1) JPS5690103A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61168373U (en) * 1985-04-09 1986-10-18

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61168373U (en) * 1985-04-09 1986-10-18

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