Combination pressure relief and topping valve

Details Combination pressure relief and topping valve Combination pressure relief and topping valve

2007-02-06

2007-02-06

Rivell, John (Department: 3753)

Fluid handling

Inflatable article

With pressure-responsive pressure-control means

C137S493400, C137S493900

Reexamination Certificate

active

10081531

ABSTRACT:
A combination or hybrid pressure relief and topping valve for use with inflatable devices such as life rafts and escape slides. The valve including a valve body with a fluid passage therein that includes an internal shoulder. The valve further includes a first poppet with a seal seated therein where the first poppet is biased against the shoulder by a first spring. The first poppet and seal further having an aperture therein. The valve also includes a second poppet biased into the aperture by a second spring. The combination of poppets, springs and the seal provide for a neutral mode where the valve is sealed, a topping mode where fluid is allowed to pass through the valve and into an inflatable device sealed to one end of the valve, and a pressure relief mode where fluid is released from the inflatable device to the atmosphere when overpressure within the inflatable device exists.

REFERENCES:
patent: 1369343 (1921-02-01), Lamb
patent: 1837970 (1931-12-01), Jones
patent: 1841354 (1932-01-01), Bowen
patent: 2254655 (1941-09-01), Everet
patent: 2349416 (1944-05-01), Freeman
patent: 2606570 (1952-08-01), Buenik
patent: 2690757 (1954-10-01), Orchowski
patent: 3108610 (1963-10-01), De See
patent: 3450147 (1969-06-01), Webb
patent: 3971406 (1976-07-01), Inada et al.
patent: 4691734 (1987-09-01), Fort
patent: 5029604 (1991-07-01), Spektor et al.
patent: 5282492 (1994-02-01), Angeli

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