Chemical and biological warfare filter injector mechanism

Details Chemical and biological warfare filter injector mechanism Chemical and biological warfare filter injector mechanism

1992-04-27

1993-11-23

Burr, Edgar S.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820511, 12820425, 12820429, 137494, A62B 902, A62B 704, A61M 1600, F16K 3126

Patent

active

052634779

ABSTRACT:
An injector mechanism uses breathing system gas to entrain cabin air to demist and defog the hood and visor of an aircrew chemical and biological warfare ("CBW") suit. The injector includes a needle valve for flow rate adjustment and an aneroid for altitude compensation. The CBW filter is downstream of the negative pressure produced by the injector to purify any ambient air drawn into the system at the negative pressure region. Positive pressure in the system downstream of the CBW filter prevents inward leakage and contamination of the demist and defog gas stream.

REFERENCES:
patent: 2824557 (1958-02-01), Mejean et al.
patent: 3474812 (1969-10-01), Robertson
patent: 4404969 (1983-09-01), Cresswell et al.
patent: 4651728 (1987-03-01), Gupta et al.
patent: 4676236 (1987-06-01), Piorkowski et al.
patent: 4741332 (1988-05-01), Beaussant
patent: 4856507 (1989-08-01), Ouillon et al.

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