Flow rate control apparatus

Details Flow rate control apparatus Flow rate control apparatus

2007-09-04

2007-09-04

Keasel, Eric (Department: 3753)

Valves and valve actuation

Electrically actuated valve

Balanced valve

C251S282000, C251S129110, C251S331000

Reexamination Certificate

active

11154510

ABSTRACT:
A flow rate control valve comprises a rotary driving source which is rotated by a control signal, a movable member which is displaceable by the aid of a transmitting shaft under a rotary action of the rotary driving source, a valve mechanism which is connected to the end of the movable member and which is capable of being seated on and separated from a valve seat of a valve body, and a balance mechanism which is integrally connected underneath the valve mechanism with a connecting shaft intervening therebetween. When the valve opening degree is changed in a state in which pressure fluid is supplied into the valve body, the balance mechanism maintains an equilibrium state with respect to the valve mechanism.

REFERENCES:
patent: 3753526 (1973-08-01), Johnson
patent: 3985333 (1976-10-01), Paulsen
patent: 4593881 (1986-06-01), Yoshino
patent: 4711269 (1987-12-01), Sule
patent: 5007458 (1991-04-01), Marcus et al.
patent: 3-292483 (1991-12-01), None
patent: 5-43914 (1993-07-01), None
patent: 11-136925 (1999-05-01), None

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