Combined control and check valve for gas torches

Details Combined control and check valve for gas torches Combined control and check valve for gas torches

1996-09-27

1998-06-23

Ferensic, Denise L.

Fluid handling

Systems

Flow path with serial valves and/or closures

251284, 251359, 251215, E03B 6520

Patent

active

057691193

ABSTRACT:
A combination control valve and check valve for a gas torch is disclosed wherein a check valve is positioned within an annular control valve member downstream of a spherical control valve element with which the annular control valve member cooperates to open and close the control valve and thus the flow of gas from a source to a gas torch. The check valve protects the control valve under reverse gas flow conditions.

REFERENCES:
patent: 2519569 (1950-08-01), Hart
patent: 3354930 (1967-11-01), Hach
patent: 3420493 (1969-01-01), Kraft
patent: 3938555 (1976-02-01), Swickley
patent: 4361420 (1982-11-01), Bell
patent: 4479511 (1984-10-01), Holland
patent: 4804017 (1989-02-01), Knapp
patent: 5407348 (1995-04-01), Mims et al.
patent: 5435344 (1995-07-01), Robinson et al.
patent: 5507438 (1996-04-01), Thomas et al.
patent: 5509444 (1996-04-01), Robinson et al.

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