Motor actuator for valve

Details Motor actuator for valve Motor actuator for valve

1991-06-25

1992-03-24

Rosenthal, Arnold

Fluid handling

With indicator, register, recorder, alarm or inspection means

Position or extent of motion indicator

25112911, 137269, F16K 3105

Patent

active

050980637

ABSTRACT:
A valve has a housing having a nonrotatable polygonal-section stem centered on a valve axis and a spindle coaxial with the stem, projecting axially therefrom, and formed with at least one peripheral tooth. A valve actuator has an electric drive motor having a housing and a drive shaft projecting from the housing along the axis and a sleeve fixed to the drive-motor housing coaxially with the shafts and formed with a seat complementarily engageable with the polygonal-section stem. Thus the sleeve and drive-motor housing are rotationally locked to the stem. A coupling fixed on the drive shaft fits complementarily over the spindle at the tooth thereof to rotationally interconnect the spindle and drive shaft and a rotary potentiometer in the sleeve between the coupling and the drive motor has a rotary part fixed on the drive shaft and a nonrotating part fixed on the motor housing.

REFERENCES:
patent: 2678661 (1954-05-01), Roper et al.
patent: 4156437 (1979-05-01), Chivens et al.
patent: 4577661 (1986-03-01), Melrose et al.

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