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US 6,820,647 B1Granted
Valve position monitor
AssigneeWestlock Controls Corporation
InventorsJohn Jude Grecco, Antimo J. Martin, Leo Minervini, Franklin H. Sinclair
Life of this patent
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Abstract
A valve position monitor that provides simultaneous visual and electrical signals of valve position is disclosed. A method of monitoring the position of a valve by utilizing the valve position monitor described herein is also disclosed.
Claims5
A valve position monitor, adapted to be connected to a valve actuator having a rotatable shaft corresponding to valve position, and providing both a visual and electrical signal of valve position, comprising:
- a) a body comprising:
- i.) an output shaft comprising an inner core and a retainer bushing, said output shaft adapted to engage the rotatable shaft of the valve actuator
- ii.) two trigger housings independently rotatable about said output shaft and axially adjustable about said output shaft, said two trigger housings having one trigger and means for interlocking with interlocking means on said output shaft, and one of said trigger housings having visual indicia thereon;
- iii.) a polymeric wave spring to interlock said trigger housings with said output shaft;
- and
- iv.) a housing adapted to be secured to the valve actuator, said housing having three opening, and
- b) two limit switches that can detect the triggers and transmit electrical signals of the valve position.
4 more elements
Dependencies are inferred from the claim text.