JPS5794104A - Switching valve - Google Patents

Switching valve

Info

Publication number
JPS5794104A
JPS5794104A JP16948880A JP16948880A JPS5794104A JP S5794104 A JPS5794104 A JP S5794104A JP 16948880 A JP16948880 A JP 16948880A JP 16948880 A JP16948880 A JP 16948880A JP S5794104 A JPS5794104 A JP S5794104A
Authority
JP
Japan
Prior art keywords
actuator
pipings
operation lever
over
operativity
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
JP16948880A
Other languages
Japanese (ja)
Other versions
JPS6352242B2 (en
Inventor
Eiki Izumi
Hiroshi Watanabe
Yukio Aoyanagi
Kazuo Honma
Yoshio Nakajima
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.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery 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 Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP16948880A priority Critical patent/JPS5794104A/en
Publication of JPS5794104A publication Critical patent/JPS5794104A/en
Publication of JPS6352242B2 publication Critical patent/JPS6352242B2/ja
Granted legal-status Critical Current

Links

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  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE: To improve an operativity of an actuator by connecting a piping connected to an actuator through a change-over valve changed over when an operation lever is at its operable position to a puppet valve at its behind.
CONSTITUTION: The rear portions of puppet valves 4a, 4b are connected to pipings 6a, 6b through change-over valves 17a, 17b changed when an operation lever 12 is moved to its operative position. Consequently, when a load is applied to an actuator and even when the operation lever 12 is finely moved, the actuator does not operate if the pressure in pipings 5a, 5b are not higher than these in the pipings 6a, 6b. Then the actuator does not operate if the operator does not want and an operativity can be improved.
COPYRIGHT: (C)1982,JPO&Japio
JP16948880A 1980-12-03 1980-12-03 Switching valve Granted JPS5794104A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16948880A JPS5794104A (en) 1980-12-03 1980-12-03 Switching valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16948880A JPS5794104A (en) 1980-12-03 1980-12-03 Switching valve

Publications (2)

Publication Number Publication Date
JPS5794104A true JPS5794104A (en) 1982-06-11
JPS6352242B2 JPS6352242B2 (en) 1988-10-18

Family

ID=15887453

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16948880A Granted JPS5794104A (en) 1980-12-03 1980-12-03 Switching valve

Country Status (1)

Country Link
JP (1) JPS5794104A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5138838A (en) * 1991-02-15 1992-08-18 Caterpillar Inc. Hydraulic circuit and control system therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5138838A (en) * 1991-02-15 1992-08-18 Caterpillar Inc. Hydraulic circuit and control system therefor
WO1992014944A1 (en) * 1991-02-15 1992-09-03 Caterpillar Inc. Hydraulic circuit and control system therefor

Also Published As

Publication number Publication date
JPS6352242B2 (en) 1988-10-18

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