| 摘要 |
<p>PCT No. PCT/GB93/02628 Sec. 371 Date Aug. 18, 1995 Sec. 102(e) Date Aug. 18, 1995 PCT Filed Dec. 22, 1993 PCT Pub. No. WO94/15104 PCT Pub. Date Jul. 7, 1994A hydraulic actuator for an isolator such as a diverter valve, the actuator comprising a hydraulic ram (1) one end of which is connected to a lever (2) which is in turn connected to a shaft (3) for a valve plate or other closure. The basic novel characteristic of the actuator is that the end of the actuator frame remote from the shaft is connected to the isolator frame by means of a torque arm reaction anchor (4) so as to prevent the actuator from rotating with the shaft.</p> |
