Title:
PRESSURE CONTROL VALVE
Document Type and Number:
Japanese Patent JPS6074005
Kind Code:
A
Abstract:
PURPOSE:To prevent spool oscillation and also to prevent the generation of noise by forming the 2nd pressure control part between a pilot chamber at one end of a spool and a tank port. CONSTITUTION:When the spool 23 is moved to left by operating a right-side screw rod 43, the 2nd pressure control part 40 is closed and the 1st pressure control part 32 is opened. A spread flow is generated in the direction from a primary port P to a secondary port A raise secondary pressure P2. When the secondary pressure P2 exceeds the force of a spring 31, the spool 23 moves to right to close the 1st pressure control part 32, and the secondary pressure control part 40 is opened. A spread flow is generated in the direction from the pilot chamber 28 to a tank port T at the secondary pressure control part 40 to reduce the secondary pressure P2. Then, the spool 23 stops where the secondary pressure P2 balances with the force of the spring 31.
Inventors:
MASUDA KENJI
SUHARA MASAAKI
SUHARA MASAAKI
Application Number:
JP18421784A
Publication Date:
April 26, 1985
Filing Date:
September 03, 1984
Export Citation:
Assignee:
DAIKIN IND LTD
International Classes:
G05D16/10; G05D16/16; (IPC1-7): G05D16/14
Domestic Patent References:
| JPS4924937A | 1974-03-05 | |||
| JPS482419A | ||||
| JPS4727850A | ||||
| JPS4722516A |
Attorney, Agent or Firm:
Masahiro Nishimori
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