Valve actuator two rotor three position indicator

Details Valve actuator two rotor three position indicator Valve actuator two rotor three position indicator

1989-05-19

1990-07-10

Shoap, Allan N.

Signals and indicators

Indicators

Valve position

116303, F16K 3700, G01D 1300

Patent

active

049400118

ABSTRACT:
A two-rotor, three-position indicator for a valve actuator is connected to receive rotary input from at least two independently operating rotors connected inside the geared limit switch of a valve actuator. Individual drive lugs moved interconnected gearing to cause a pointer to indicate whether the valve stem is open, closed or in-between those two oppositely disposed limits.

REFERENCES:
patent: 1778583 (1930-10-01), Bryant
patent: 2582556 (1952-01-01), Morey
patent: 3656504 (1972-04-01), Topinka
Auma Publication: "Actuators: Arma Norm: SA 07.1-SA 48.1"; 3 pages; date unknown.
Rotork Publication: Rotork controls Division; "`A`Range Double-Sealed Valve Actuators"; 5 pages; date unknown.

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