发明名称 |
Throttle for hydraulic mine roof support - has safety valve in form of movable plunger within piston set by variable spring |
摘要 |
<p>The reducing valve is for hydraulic machines and mechanical equipment, esp. hydraulic mining roof supports. A piston is acted upon on one side by the fluid pressure and on the other side by a spring assembly, whose spring pressure is variable. an integral safety valve is opened or closed by the piston movement. The safety valve (4) is in the form of a movable plunger (20) within the piston (3). There is a stop (6) between the piston (3) and spring assembly (5) and this can be fixed by a set screw (11). The piston has a bore (17), whose top end (18) is in the form of an inclined surface (16) which corresponds with the safety valve seat (13).</p> |
申请公布号 |
DE2803706(A1) |
申请公布日期 |
1979.08.02 |
申请号 |
DE19782803706 |
申请日期 |
1978.01.28 |
申请人 |
HEBBEN,ROLF,DIPL.-VOLKSW.;FISCHBACH,MANFRED,ING. |
发明人 |
HEBBEN,ROLF,DIPL.-VOLKSW.;FISCHBACH,MANFRED,ING. |
分类号 |
F16K17/06;(IPC1-7):15B13/02;16K17/04;21D15/51 |
主分类号 |
F16K17/06 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|