JPS5517750A - Control valve - Google Patents

Control valve

Info

Publication number
JPS5517750A
JPS5517750A JP8976178A JP8976178A JPS5517750A JP S5517750 A JPS5517750 A JP S5517750A JP 8976178 A JP8976178 A JP 8976178A JP 8976178 A JP8976178 A JP 8976178A JP S5517750 A JPS5517750 A JP S5517750A
Authority
JP
Japan
Prior art keywords
pressure
spool
orifice
reducing valve
piston
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
JP8976178A
Other languages
Japanese (ja)
Inventor
Masao Ohashi
Hirokatsu Sakamoto
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.)
Kawasaki Heavy Industries Ltd
Original Assignee
Kawasaki Heavy Industries 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 Kawasaki Heavy Industries Ltd filed Critical Kawasaki Heavy Industries Ltd
Priority to JP8976178A priority Critical patent/JPS5517750A/en
Publication of JPS5517750A publication Critical patent/JPS5517750A/en
Pending legal-status Critical Current

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  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE: To simplify a device and also to decrease loss of an oil flow, by locating a reducing valve between a hydraulic drive source and a cylinder and by allowing the reducing valve to perform a relieve functioning as well.
CONSTITUTION: Orifices 12 and 13 placed at a spool 11 of a reducing valve are moved according to the balance of a hydraulic pressure, which is applied through a pilot passage 6, and a spring. While a piston 9a is moving to the right after turning on a switch valve 10, a pressure of a cylinder port B can be kept constant by adjusting condition of the orifice 12 by means of the spool 11. When the piston 9a reaches a stroke, the pressure of the cylinder port B rises, and the pressure in chambers 14 and 15 increase. And as a result the spool 11 closes the orifice 12 and opens the orifice 13. And thus, an oil volume branching to a pump port A can be only an oil volume being equivalent to the leackage.
COPYRIGHT: (C)1980,JPO&Japio
JP8976178A 1978-07-21 1978-07-21 Control valve Pending JPS5517750A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8976178A JPS5517750A (en) 1978-07-21 1978-07-21 Control valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8976178A JPS5517750A (en) 1978-07-21 1978-07-21 Control valve

Publications (1)

Publication Number Publication Date
JPS5517750A true JPS5517750A (en) 1980-02-07

Family

ID=13979689

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8976178A Pending JPS5517750A (en) 1978-07-21 1978-07-21 Control valve

Country Status (1)

Country Link
JP (1) JPS5517750A (en)

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