JPS5614604A - Hydraulic circuit - Google Patents

Hydraulic circuit

Info

Publication number
JPS5614604A
JPS5614604A JP9033679A JP9033679A JPS5614604A JP S5614604 A JPS5614604 A JP S5614604A JP 9033679 A JP9033679 A JP 9033679A JP 9033679 A JP9033679 A JP 9033679A JP S5614604 A JPS5614604 A JP S5614604A
Authority
JP
Japan
Prior art keywords
change
over
pressure
pressure oil
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
JP9033679A
Other languages
Japanese (ja)
Inventor
Takashi Kanai
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 JP9033679A priority Critical patent/JPS5614604A/en
Publication of JPS5614604A publication Critical patent/JPS5614604A/en
Pending legal-status Critical Current

Links

Landscapes

  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE: To store pressure oil of a pressure at or higher than a preset change-over pressure in an accumulator and to reduce the repetition number of the change-over operation upon occurrence of a leak, by providing a throttle valve with a pilot line of an unload/on-load change-over valve for the pressure oil.
CONSTITUTION: In a hydraulic circuit of a device such as clamp device where no substantial flow rate of pressure oil is required, a change-over valve 25 which is adapted to carry out the change-over of unload and on-load of pressure oil from a pressure oil source 21 is provided at a point downstream a main change-over valve 22. Furthermore, the change-over valve 25 is provided with pilot lines 32, 37 and a throttle valve 33. Thus, any pressure oil of a pressure at or higher than a change- over pressure preset by the change-over valve 25 can be stored in an accumulator 36, thereby reducing the repetition number of unload/on-load operation when a leak occurs in the circuit and thus prolonging the life of each device constituting the circuit.
COPYRIGHT: (C)1981,JPO&Japio
JP9033679A 1979-07-18 1979-07-18 Hydraulic circuit Pending JPS5614604A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9033679A JPS5614604A (en) 1979-07-18 1979-07-18 Hydraulic circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9033679A JPS5614604A (en) 1979-07-18 1979-07-18 Hydraulic circuit

Publications (1)

Publication Number Publication Date
JPS5614604A true JPS5614604A (en) 1981-02-12

Family

ID=13995671

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9033679A Pending JPS5614604A (en) 1979-07-18 1979-07-18 Hydraulic circuit

Country Status (1)

Country Link
JP (1) JPS5614604A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5191826A (en) * 1990-07-05 1993-03-09 Heilmeier & Weinlein Fabrik Fur Oel-Hydraulik Hydraulic control device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5191826A (en) * 1990-07-05 1993-03-09 Heilmeier & Weinlein Fabrik Fur Oel-Hydraulik Hydraulic control device

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