First and second stage regulator system for breathing gas

Details First and second stage regulator system for breathing gas First and second stage regulator system for breathing gas

1982-09-28

1985-02-12

Recla, Henry J.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820524, 12820523, 12820222, 137494, 13750512, 137557, 137599, 2511492, A62B 704

Patent

active

044984715

ABSTRACT:
A first and second stage breathing gas regulator having a first stage redundant piston assembly with a first piston encompassing a second piston. In the eventuality the first piston fails, the second piston provides regulated gas. A safety alarm is provided when a pre-established pressure drop occurs, signalling a decrease in breathing gas by opening to provide gas to drive an audio alarm. The second stage regulator has a balanced second stage that operates with a valve lever in operative relationship to a diaphragm. A hand wheel and cammed valve permit the bypass of breathing gas around the valve of the second stage regulator when required. The outlet of the second stage regulator is provided with a trap door cover to avoid dirt and debris being introduced to the second stage regulator when a hose is not connected thereto.

REFERENCES:
patent: 2676612 (1954-04-01), Stevenson
patent: 2854001 (1958-09-01), Humblet
patent: 2861588 (1958-11-01), Cronk
patent: 3111946 (1963-11-01), Galeazzi
patent: 3224409 (1965-12-01), Fenger et al.
patent: 3308815 (1967-03-01), Wilcox et al.
patent: 3329158 (1967-07-01), Geiszler
patent: 3584596 (1971-06-01), Westcott
patent: 3722510 (1973-03-01), Parker
patent: 3805780 (1974-04-01), Cramer et al.
patent: 4289295 (1981-09-01), Allread

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