초록 ▼

There is disclosed herein an apparatus forming a part of an actuator for providing a constant visual display of the position of a valve. Such apparatus comprises an indicator shaft rotatably disposed in a bore which is oriented perpendicularly of and offset from an actuator stem, a rack means on the

There is disclosed herein an apparatus forming a part of an actuator for providing a constant visual display of the position of a valve. Such apparatus comprises an indicator shaft rotatably disposed in a bore which is oriented perpendicularly of and offset from an actuator stem, a rack means on the actuator stem, a pinion means on the indicator shaft, and an indicating means engraved on the end face of the indicator shaft and visible from the exterior of the actuator. The apparatus is sealingly enclosed and immersed in a fluid medium. Linear motion of the actuator stem generates angular motion of the indicator shaft, causing the indicating means to provide a visual display of valve position.

대표청구항 ▼

An apparatus for indicating the position of a valve having a reciprocating member arranged for reciprocal motion to open and close the valve, said apparatus comprising: a support body including a generally cylindrical indicator bore extending through at least one side thereof along a line oriented g

An apparatus for indicating the position of a valve having a reciprocating member arranged for reciprocal motion to open and close the valve, said apparatus comprising: a support body including a generally cylindrical indicator bore extending through at least one side thereof along a line oriented generally perpendicular to the line of reciprocal motion of the reciprocating member; a shaft rotatably disposed within the indicator bore; means on said shaft forming a pinion; means connected to the reciprocating member forming a rack, said rack means engaging said pinion means and being disposed for generally linear motion simultaneous and coextensive with motion of the reciprocating member; means for sealingly isolating said rack means and said pinion means, said isolating means defining a sealed space isolated from fluids within and without said support body, said sealed space being charged with a fluid medium, surrounding said rack means and said pinion means, for protecting and lubricating said apparatus; and indicator means for providing an indication of valve position.