Trip valve construction

Details Trip valve construction Trip valve construction

1979-04-18

1980-12-16

Schwadron, Martin P.

Valves and valve actuation

Mechanical movement actuator

Cam

F16K 31524

Patent

active

042391865

ABSTRACT:
A trip valve including a valve body provided with a valve seat and further including a movable trip lever having a cam defining a first support surface thereof. A valve stem is movably disposed within the valve body and includes a valve attached to one end thereof for movement between a closed seat engaged position and an open seat disengaged position. A trip pin is attached to the valve stem and is movable therewith. The trip pin is supported upon the first support surface of the trip lever. A force generating device is operably connected to the valve stem for urging the valve into its seat engaged position. The cam includes a first portion movable between a first position spaced from the trip pin and a second position whereat the trip pin is directly supported upon the first portion of the cam. The first portion of the cam provides a force for urging the valve into its open seat disengaged position.

REFERENCES:
patent: 275099 (1883-04-01), Walker
patent: 1580681 (1926-04-01), Saksa
patent: 1740602 (1929-12-01), Keeler
patent: 2603445 (1952-07-01), Marchant

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