Valve closure system and valve closure assembly having...

Valves and valve actuation – Detachable actuator

Reexamination Certificate

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Reexamination Certificate

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06957802

ABSTRACT:
A valve closure assembly (50) for remotely and automatically closing a railway tank car valve (V1,V2,V3,V4), characterized by improved convenience in mounting on a tank car dome (160) and adaptability to various dome geometries, valve configurations, and car-to-car dimensional variations. A clamp assembly (52) mounts assembly (50) on dome (160). An adapter (90) operated by a motor (58) acting through a torque limiter (88) turns a valve handle (A1,A2,A3,A4) when motor (58) runs. A positioning mechanism (54) selectively positions adapter (90) relative to clamp assembly (52) to establish a spatial relationship between them for enabling clamp assembly (52) to be placed at a desired location on the dome wall (162) and adapter (90) to engage a valve handle. Positioning mechanism (54) comprises three degrees of freedom of motion for establishing the spatial relationship of adapter (90) to clamp assembly (52), two of which are in the horizontal plane.

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