Valves and valve actuation – With actuation lubricating means
Patent
1984-04-17
1987-01-13
Scott, Samuel
Valves and valve actuation
With actuation lubricating means
251 58, 137554, 137556, 91 1, 92 5R, 116DIG7, 116285, F16K 3100
Patent
active
046359010
ABSTRACT:
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.
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Odar H. A.
Rose David A.
Scott Samuel
Shull William E.
Smith International Inc.
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