| 摘要 |
988,007. Valves. BORSIG A.G., and W. HARTMANN. April 27, 1962 [May 25, 1961], No. 16079/62. Addition to 987,906. Heading F2V. The guide bush 3 of the cock described in the parent Specification is displaced towards sealing position by a screw-actuated wedge 11 in the cock housing. The actuating screw 15, which is connected to the wedge by a bolt 19 and has surfaces 17 for engagement by a box spanner, is mounted in a bore 12 closed by a cap 24. |
