Anaesthetic inflation valves

Details Anaesthetic inflation valves Anaesthetic inflation valves

1974-05-14

1976-04-27

Schwadron, Martin P.

Fluid handling

Self-proportioning or correlating systems

Supply and exhaust type

137494, 137DIG9, F16K 1514

Patent

active

039527620

ABSTRACT:
An inflation valve comprising an inlet; an inlet valve seat; an inlet valve member having an input face, part of which is engageable with the inlet valve seat, and an output face; a restricted passageway from a first space on the input face side of the inlet valve member to a second space on the output face side of the inlet valve member; an outlet valve seat; an outlet valve member having a first face engageable with the outlet valve seat and capable of being exposed directly or indirectly to pressure in the first or said second space and a second face exposed to exhaust pressure; and a mechanical connection between the two valve members; the mechanical connection and the relationship between the surface areas of the faces being such that when the pressure differential between the first and second spaces is above a given valve the inlet valve is held open and the outlet valve is held closed, but when the pressure differential falls below the given value the outlet valve is opened and the inlet valve is closed.

REFERENCES:
patent: 2318721 (1943-05-01), Siver
patent: 3613710 (1971-10-01), Oberthur
patent: 3700000 (1972-10-01), Hesse

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