发明名称 |
Hydraulic slide control safety valve for a mine support jack |
摘要 |
A safety valve designed for relieving pressure in a mine support jack. A washer and check valve are positioned in a counterbore located on the front surface of a resilient gasket member. A leg extends from the rear surface of the resilient gasket and extends through a rear chamber to support the check valve in a position sealing the outlet port. The rear chamber is filled with pressurized gas to form a gas cushion. The end of the leg is positioned to seal an inflation orifice.
|
申请公布号 |
US4557290(A) |
申请公布日期 |
1985.12.10 |
申请号 |
US19840673866 |
申请日期 |
1984.11.21 |
申请人 |
BENNES MARREL |
发明人 |
CHANAL, ROGER;COTTE, DANIEL |
分类号 |
E21D23/16;F16K17/04;(IPC1-7):F16K31/12 |
主分类号 |
E21D23/16 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|