Demand valve

Details Demand valve Demand valve

1981-05-18

1983-10-25

Recla, Henry J.

Fluid handling

Self-proportioning or correlating systems

Self-controlled branched flow systems

137113, 137271, 137510, 12820426, 12820524, G05D 1100, A62B 704

Patent

active

044112858

ABSTRACT:
A diver's demand valve has a diaphragm 15 with a centrally located rigid element 16 which pivots with a lever effect on an eccentric port 22 upon establishing an operative pressure difference across the diaphragm to open and close the valve. An abutment surface 30 prevents unwanted pivoting and a spring 27 keeps the rigid element 16 seated except during operative pressure differences.
For a diver's exhalation demand valve an "anti-squeeze", safety, flap valve 34 may be provided in the rigid element 16.

REFERENCES:
patent: 2929376 (1960-03-01), Kemper
patent: 3429329 (1969-02-01), Berkley

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