Fluid handling – Control by change of position or inertia of system – By pendulum or swinging member
Patent
1993-05-20
1993-12-21
Nilson, Robert G.
Fluid handling
Control by change of position or inertia of system
By pendulum or swinging member
F16K 1736
Patent
active
052714250
ABSTRACT:
A fully automatic valve closing apparatus that is responsive to movement between the apparatus and a substantially fixed structure, wherein the apparatus includes a supporting frame on which is mounted a pressure activated actuator which is adapted to be fixedly mounted to a main in-line valve of a fluid flow system such as a gas or water utility line. A gas pressure activating system is operably interconnected between the fixed structure by means of a tripping mechanism defining a universal linkage device that removably engages a pair of pressure control valves. The main valve is moved to a closed position when movement occurs between the valve closing apparatus and the substantially fixed structure to which the universal linkage is movably attached. The apparatus which contains no electrical components is pneumatically operated from a self-contained power source.
REFERENCES:
patent: 2054563 (1936-09-01), Hansen
patent: 2585316 (1952-02-01), Hobson
patent: 3888271 (1975-06-01), Pettit
patent: 4103697 (1978-08-01), Kiesow
patent: 4531533 (1985-07-01), Coombes et al.
patent: 4852600 (1989-08-01), Asbra
patent: 4889313 (1989-12-01), Sanchez
Jackson Harold L.
Nilson Robert G.
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