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Patent Searching and Data


Title:
RELIEF VALVE
Document Type and Number:
Japanese Patent JP2002106741
Kind Code:
A
Abstract:

To provide a relief valve capable of surely preventing blow-by from the relief valve in demagnetizing a solenoid and of automatically exerting its intrinsic relief function in magnetizing the solenoid.

A main valve element 16 facing to a main seat part 17 in a valve body 10 and having a spring chamber 30 capable of communicating with an inlet port 19 through an orifice 22 is separably installed. A main spring 18 for energizing the main valve element 16 toward the main seat part 17 is mounted in the spring chamber 30. A seat body 14 having a pilot seat part 15 capable of communicating with the spring chamber 30 and connected to a tank 61 is fixed inside the valve body 10. A pilot valve element 13 is separably mounted to the pilot seat part 15 of the seat body 14. The pilot valve element 13 is energized toward the pilot seat part 15 by force according to the current- carrying amount to the solenoid 11. A selector valve element 40 operated by the current-carrying amount to the solenoid 11 larger than a set value for connecting the spring chamber 30 to the pilot seat part 15 is formed with a magnetic body.


Inventors:
SHIMADA YOSHIYUKI
Application Number:
JP2000294628A
Publication Date:
April 10, 2002
Filing Date:
September 27, 2000
Export Citation:
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Assignee:
CATERPILLAR MITSUBISHI LTD
International Classes:
F16K17/06; F16K31/06; F16K47/02; (IPC1-7): F16K31/06; F16K17/06; F16K47/02
Attorney, Agent or Firm:
Kabazawa Xiang (2 people outside)