Automatic flood control valve

Details Automatic flood control valve Automatic flood control valve

1986-04-23

1987-04-21

Cohan, Alan

Valves and valve actuation

Biased trip

Electrical trip actuation

251 74, F16K 3144

Patent

active

046590633

ABSTRACT:
An automatic shut off valve for shutting off the water supply to a building in the case of a detected water leak. A conventional valve is provided with an apparatus for rendering the valve automatic when the valve has a sliding stem projecting from the valve body. The apparatus includes a jacket adapted to fit over the valve body to contain the stem having a roof normal to the axis of the stem and spaced from the end thereof and a plunger slidably mounted through the roof extending coaxial with and connected to the stem. A compression spring extends between the roof and the plunger to urge the valve stem to retract to close the valve. A lever member is pivotally mounted to the plunger and extends exteriorly of the jacket. The lever member includes a cam head abutting the roof between plunger extended and retracted positions. A retaining member is pivotally mounted to the exterior of the jacket and a pair of arms extends outwardly therefrom with one arm of the retaining member engaging a first lever arm on the lever member to retain in a plunger extended position. The retaining member has a third arm extending in the direction opposite to the second arm and is connected to a solenoid device which can be actuated to pivot the retaining member to disengage the second arm of the retaining means from the lever arm allowing the plunger to retract the valve stem and close the valve.

REFERENCES:
patent: 896402 (1908-08-01), Locke
patent: 2333370 (1943-11-01), Graham
patent: 2875617 (1959-03-01), Murphy
patent: 3030063 (1962-04-01), Seaberg et al.
patent: 3797804 (1974-03-01), Ashbaugh
patent: 4004601 (1977-01-01), Bachelder et al.
patent: 4379544 (1983-04-01), Angelo et al.

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