Fluid handling – Systems – Flow path with serial valves and/or closures
Patent
1986-11-24
1988-10-04
Chambers, A. Michael
Fluid handling
Systems
Flow path with serial valves and/or closures
13761406, 13761417, 2511496, 285306, F16L 3728
Patent
active
047749830
ABSTRACT:
A safety device for gas welding is provided between a gas supply source and a burner torch to prevent counter-flow and back-fire from the burner torch in the direction of the gas supply source, and further, to positively cut off the flow path, so that explosion of the gas supply source is prevented. The gas welding safety device comprises a socket-side coupling providing a flow path, a plug-side coupling separably connected with the socket-side coupling and having a flow path communicating with the flow path of the socket-side coupling, and a mechanical mechanism for separably connecting both couplings. Within the flow path of the socket-side coupling, a movable valve seat confining a movable valve body for cutting off the normal gas flow are incorporated. The valve body has a valve seat portion and in turn houses a check valve for preventing dangerous counter-flow. If counter-flow pressure is generated, the check valve actuates and prevents the counter-flow and the counter-flow pressure also actuates the movable valve seat, which in turn actuates the mechanical mechanism, automatically physically separating both couplings.
REFERENCES:
patent: 2279146 (1942-04-01), Schneller
patent: 2327611 (1943-08-01), Scheiwer
patent: 2463253 (1949-03-01), Earle et al.
patent: 2482457 (1949-09-01), Boedecker
patent: 2648548 (1953-08-01), Scheiwer
patent: 2831500 (1958-04-01), Fenuena et al.
patent: 3474827 (1969-10-01), Torres
patent: 3689239 (1972-09-01), Eriksson
patent: 4088436 (1978-05-01), Alferes
Adams Bruce L.
Chambers A. Michael
Fox John C.
Wilks Van C.
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