| 摘要 |
A valve operator assembly is provided for a valve and comprises a housing (18), an input member (20) rotatably mounted, and a transmission mechanism (22) comprising a translating element (24) and a rotating element (28) connected to the input member, said transmission mechanism being adapted to convert applied rotation of the input member into axial translation of said translating element. The assembly further comprises at least one locking mechanism (23) radially interposed between the transmission mechanism (22) and the housing (18), and provided with friction means (82) freely movable in circumferential direction relative to the transmission mechanism and to the housing and with one freewheel (80) comprising a plurality of locking members mounted in radial contact with a track of said friction means, the freewheel and the friction means cooperating together to lock the transmission mechanism (22) with the housing (18) in a static position of said assembly. |
