Valves and valve actuation – Mechanical movement actuator – Gear
Patent
1995-05-02
1996-04-16
Walton, George L.
Valves and valve actuation
Mechanical movement actuator
Gear
74 8918, 2512505, F16K 3153
Patent
active
055074693
ABSTRACT:
A system for reducing the initial force required to actuate a valve, preferably a rotary valve, from its fully closed position is disclosed. The system comprises an operating arm fixed to and rotatable with the valve stem. Disposed and rotatable about, but not fixed to, the valve stem is a spur gear with an operating lever affixed thereto. The force applied to the operating lever is transferred to the operating arm through a gear sector carried on the operating arm. During the initial actuation, the gear sector engages with and rotates about a latch pin to increase the force applied to the operating arm by the operating lever. During the remainder of the actuating movement, the gear sector is fixed relative to the operating arm so that the force applied to the operating lever is transmitted to the operating arm without any increase in force.
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patent: 4962911 (1990-10-01), Soderberg
patent: 5333834 (1994-08-01), Soderberg
Soderberg Research & Development, Inc.
Walton George L.
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