Fluid handling – Control by change of position or inertia of system
Patent
1994-05-12
1995-09-12
Nilson, Robert G.
Fluid handling
Control by change of position or inertia of system
251 65, 251 72, F16K 1736
Patent
active
054490154
ABSTRACT:
A shock-activated shut-off valve including a housing having an upper chamber and a lower chamber separated by a flap-gate pivotally connected to the housing, the lower chamber comprising an inlet orifice, and outlet orifice and a flap-gate stop means; a weight; a shock-actuated retainer defining a weight-passable opening and a latching means comprising a receptacle arm pivotally connected to a counter-weight and a flap-gate actuator, wherein, in one position, the counter-weight maintains the receptacle arm and the flap-gate in a horizontal position and the weight rests on the retainer and wherein, in another position, upon shock-actuation, the weight disassociates from the retainer and, subject to vertical acceleration, engages the receptacle arm, exerting a force which exacts pivotal movement of the counterweight to allow release of the flap-gate from a horizontal position to a position engaging the flap-dash gate stop means, thereby closing the inlet orifice from the outlet orifice.
REFERENCES:
patent: 4603591 (1986-08-01), Sibley
patent: 4915122 (1990-04-01), Ikegaya
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