Purge valve for diver's mask

Details Purge valve for diver's mask Purge valve for diver's mask

1979-01-08

1980-12-30

Cline, William R.

Valves and valve actuation

Reciprocating valve

Push or pull operator

13754315, F16K 1518

Patent

active

042418984

ABSTRACT:
A purge valve for full face masks or helmets includes a base member fixed the mask wall and having passages opening in a flat, annular valve seat surface. A manually operable valve member includes an outer cylindrical wall, an inner cylindrical wall reentrant from an end wall and is axially slidable on a stem extending from the base member against the action of a compression spring nested between the cylindrical walls.

REFERENCES:
patent: 1045534 (1912-11-01), Elwell
patent: 1082508 (1913-12-01), Elwell
patent: 1871969 (1932-08-01), Elsey
patent: 2197606 (1940-04-01), Birch

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