Patent ID: 9500294
Filing Date: 2016-11-22
CPC Classification: F16K

Claim Text:
1. An apparatus for overriding a valve actuator to move a valve stem from a first position to a second position, the apparatus comprising: an override body with a central axis, the override body having a connector for releasably securing the override body to the valve actuator; a piston located within the override body; a bushing non-rotatably carried within the override body; and an override shaft in threaded engagement with the bushing and extending through a sealed orifice in the override body; wherein fluid pressure applied to the piston to cause the end surface of the bushing to engage a separate actuator stem of the valve actuator and push the valve stem, and alternately, rotation applied to the override shaft causes the bushing to move linearly so that the bushing moves axially away from the piston and the end surface of the bushing engages the actuator stem of the valve actuator and pushes the valve stem.