发明名称 |
Multifunction relief valve and airplane emergency hydraulic power source unit having the same |
摘要 |
A multifunction relief valve includes a relief chamber having an introduction port and a relief port for introducing and relieving pressure fluid; a back pressure chamber formed on one end side of the relief chamber; a piston which is movably provided in the back pressure chamber and divides the back pressure chamber into a first back pressure chamber and a second back pressure chamber; a first spring which is provided in the first back pressure chamber and exerts a biasing force in a direction in which the relief port is closed; a second spring which is provided in the second back pressure chamber and biases the piston in the direction in which the relief port is closed; and a pilot pressure supply port formed in the first back pressure chamber. The pressure fluid introduced into the first back pressure chamber via the pilot pressure supply port changes the relief pressure.
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申请公布号 |
US8474479(B2) |
申请公布日期 |
2013.07.02 |
申请号 |
US20100730682 |
申请日期 |
2010.03.24 |
申请人 |
YOSHIOKA TERUHIKO;NIWA HIDEKI;NABTESCO CORPORATION |
发明人 |
YOSHIOKA TERUHIKO;NIWA HIDEKI |
分类号 |
F16K17/20 |
主分类号 |
F16K17/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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