Thermal manual emergency shut off valve
First Claim
1. A fluid transfer system for directing the transfer of fluid between a stationary fluid supply tank and a mobile fluid delivery tank and for stopping the transfer of fluid between the stationary fluid supply tank and the mobile fluid delivery tank in response to a predetermined emergency condition, said fluid transfer system comprising:
- (a) a rigid fluid transfer conduit connected to the stationary fluid supply tank;
(b) a flexible fluid transfer conduit formed from elastic material and serially connected between said rigid fluid transfer conduit and the mobile fluid delivery tank;
(c) flow check valve means mounted in said rigid fluid transfer conduit to close off the flow of fluid therethrough;
(d) resilient means for urging said flow check valve means to a closed position;
(e) manual means for opening said flow check valve means to a full-open position;
(f) latch means for releasably holding said flow check valve means in said full-open position; and
(g) emergency trip means for actuating said latch means to close said flow check valve means whenever said flexible fluid transfer conduit is stretched beyond a predetermined limit, said emergency trip means including a non-elastic elongated element having a first end connected to said latch means and a second end fixedly secured to a remote point on said flexible fluid transfer conduit such that said latch means is released by said non-elastic elongated element to close said flow check valve means whenever the distance between said latch means and said remote point is increased beyond a predetermined amount as a result of the stretching of said flexible fluid transfer conduit beyond said predetermined limit.
1 Assignment
0 Petitions
Accused Products
Abstract
Multi position flow check valves for both liquid and vapor filler conduits having essentially two positions, a closed position, and a wide open flow position to activate the latch, the valve being automatically closed from the flow position under hazardous conditions including equipment accidents and fires, and open only when manually opened for latching purpose in tank filling operations at bulk storage stations. One hazardous condition includes an appreciable stretch strain exerted on filler hoses connected between the storage supply tank and the mobile delivery tank sufficient when dangerous to close the valves and prevent serious escape of gases in event of hose rupture. Non-extendible elements providing the differential criteria also serve as remote shut-off controls, including manual, automatic and thermal for safety termination of a refilling operation.
13 Citations
9 Claims
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1. A fluid transfer system for directing the transfer of fluid between a stationary fluid supply tank and a mobile fluid delivery tank and for stopping the transfer of fluid between the stationary fluid supply tank and the mobile fluid delivery tank in response to a predetermined emergency condition, said fluid transfer system comprising:
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(a) a rigid fluid transfer conduit connected to the stationary fluid supply tank; (b) a flexible fluid transfer conduit formed from elastic material and serially connected between said rigid fluid transfer conduit and the mobile fluid delivery tank; (c) flow check valve means mounted in said rigid fluid transfer conduit to close off the flow of fluid therethrough; (d) resilient means for urging said flow check valve means to a closed position; (e) manual means for opening said flow check valve means to a full-open position; (f) latch means for releasably holding said flow check valve means in said full-open position; and (g) emergency trip means for actuating said latch means to close said flow check valve means whenever said flexible fluid transfer conduit is stretched beyond a predetermined limit, said emergency trip means including a non-elastic elongated element having a first end connected to said latch means and a second end fixedly secured to a remote point on said flexible fluid transfer conduit such that said latch means is released by said non-elastic elongated element to close said flow check valve means whenever the distance between said latch means and said remote point is increased beyond a predetermined amount as a result of the stretching of said flexible fluid transfer conduit beyond said predetermined limit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. In a fluid transfer system including a stationary fluid supply tank and a mobile fluid delivery tank for receiving fluid from the stationary fluid supply tank, a fluid flow control means for directing the transfer of fluid between the stationary fluid supply tank and the mobile fluid delivery tank and for stopping the transfer of fluid between the stationary fluid supply tank and the mobile fluid delivery tank in response to a predetermined emergency condition, said fluid flow control means including:
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(a) a fluid transfer conduit means for conducting a flow of fluid between the stationary fluid supply tank and the mobile fluid delivery tank, said fluid transfer conduit means having at least one section thereof formed from flexible elastic material; (b) flow check valve means mounted on said fluid transfer conduit means to close off the flow of fluid therethrough; (c) resilient means for urging said flow check valve means to a closed position; (d) manual means for opening said flow check valve means to a full-flow open position; (e) latch means for releasably holding said flow check valve means in said full-flow open position; and (f) emergency trip means for actuating said latch means to close said flow check valve means whenever said flexible section of said fluid transfer conduit means is stretched beyond a predetermined limit, said emergency trip means including a non-elastic elongated element having a first end connected to said latch means and a second end fixedly secured to a remote point on said flexible section of said fluid transfer conduit means such that said latch means is released to close said flow check valve means whenever the distance between said latch means and said remote point is increased beyond a predetermined amount as a result of the stretching of said flexible portion of said fluid transfer conduit means beyond said predetermined limit.
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Specification