Fluid handling – Line condition change responsive valves – Safety cut-off requiring reset
Patent
1993-01-21
1994-01-18
Hepperle, Stephen M.
Fluid handling
Line condition change responsive valves
Safety cut-off requiring reset
137517, 137557, F16K 17164
Patent
active
052793265
ABSTRACT:
A safety valve includes a tube and a valve device. The valve device is substantially a cylindrical member with an end thereof coupled to an outlet of a gas container by a mounting device. The other end of the valve device has a threading portion for engaging with a first end of the tube whose second end communicates with a burner. The valve device has an inner gas passage which tapers to form a neck adjacent to the threading portion thereof. A stem hole is formed in the threading portion and communicates with the neck. Also formed in the threading portion are two slits which also communicate with the neck. A valve stem has a stem portion received in the stem hole and a valve head in the inner gas passage. When leakage occurs downstream of the valve device, the valve stem is moved toward the neck, and thus blocks the slits, thereby preventing from escapement of subsequent gas remained in the inner gas passage and in the gas container.
REFERENCES:
patent: 2357321 (1944-09-01), Fuller
patent: 3259144 (1966-07-01), Taplin
patent: 3331389 (1967-07-01), Kirk
patent: 3779273 (1973-12-01), Stone et al.
patent: 4269215 (1981-05-01), Odar
patent: 4494570 (1985-01-01), Adkins
patent: 5152318 (1992-10-01), Ortner et al.
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