Title:
多機能リリーフバルブおよびそれを備えた航空機の非常用油圧源ユニット
Document Type and Number:
Japanese Patent JP5320120
Kind Code:
B2
Abstract:
A multifunction relief valve 1 includes: a relief chamber 2 having an introduction port 7 and a relief port 8 for introducing and relieving pressure fluid; a back pressure chamber 3 formed on one end side of the relief chamber 2; a piston 4 which is movably provided in the back pressure chamber 3 and divides the back pressure chamber 3 into a first back pressure chamber 3a and a second back pressure chamber 3b; a first spring 5 which is provided in the first back pressure chamber 3a and exerts a biasing force in a direction in which the relief port 8 is closed; a second spring 6 which is provided in the second back pressure chamber 3b and biases the piston 4 in the direction in which the relief port 8 is closed; and a pilot pressure supply port 9 formed in the first back pressure chamber 3a. The pressure fluid introduced into the first back pressure chamber 3a via the pilot pressure supply port 9 changes the relief pressure.
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Inventors:
Yoshioka Yoshihiko
Hideki Niwa
Hideki Niwa
Application Number:
JP2009076471A
Publication Date:
October 23, 2013
Filing Date:
March 26, 2009
Export Citation:
Assignee:
Nabtesco Co., Ltd.
International Classes:
F16K17/06; B64C13/42; F15B11/02; F15B20/00
Domestic Patent References:
| JP2000249244A | ||||
| JP2001336651A | ||||
| JP2002364610A | ||||
| JP2005282699A | ||||
| JP51094030U | ||||
| JP2004535326A | ||||
| JP2000193111A |
Attorney, Agent or Firm:
Yoshiyuki Kaji
Makoto Suhara
Makoto Suhara