Visual position indicator

Details Visual position indicator Visual position indicator

1998-05-11

1999-09-28

Fox, John

Fluid handling

With indicator, register, recorder, alarm or inspection means

Position or extent of motion indicator

137552, F16K 3700

Patent

active

059571586

ABSTRACT:
A position indication for an actuator of a rotary valve has a rotor of one color mountable on the shaft of the actuator and a stator of contrasting color, each with a plurality of volutes in one-to-one correspondence. The rotor volutes are hidden behind corresponding stator volutes to indicate a closed disposition and extend beyond their corresponding stator volutes to indicate an open disposition of the valve actuator when viewed from a radial direction. Web members on the rotor are rotated into and out of registration with windows in the base and cover of the stator for indicating valve disposition from above. The rotor and stator are congruent to permit the indicator to be inverted depending on the direction of rotation of the valve actuator shaft during opening and closing of the valve.

REFERENCES:
patent: 4470429 (1984-09-01), Johnson
patent: 5137052 (1992-08-01), Baumgart

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