Pressure demand valve system

Details Pressure demand valve system Pressure demand valve system

1978-07-19

1981-05-26

Cline, William R.

Fluid handling

Self-proportioning or correlating systems

Supply and exhaust type

137DIG9, 12820024, A62B 704

Patent

active

042692164

ABSTRACT:
A respirator having a combination demand air regulator to provide air to the user on demand and an exhaust check valve. The regulator diaphragm, by its inward movement during inhalation, causes the exhalation valve to close while regulating the intake of supply air. Conversely, the regulator diaphragm, by its outward movement during exhalation, causes the exhalation valve to open while keeping the demand valve closed.

REFERENCES:
patent: 2695609 (1954-11-01), Nourse et al.
patent: 3070108 (1962-12-01), Fischer
patent: 3145721 (1964-08-01), Miller
patent: 3724482 (1973-04-01), Ekstrom
patent: 4029120 (1977-06-01), Christianson

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