Gas work with sensing and alarm means

Details Gas work with sensing and alarm means Gas work with sensing and alarm means

1989-05-26

1991-05-28

Burr, Edgar S.

Surgery

Respiratory method or device

Means for indicating improper condition of apparatus

12820527, 12820529, 12820612, 12820617, 12820617, A62B 710, A62B 900, A62B 2700

Patent

active

050185187

ABSTRACT:
In accordance with the invention, gas masks have a gas sensor behind the filter. When the filter reaches its allowable absorption limit, the gas sensor emits a signal.

REFERENCES:
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patent: 4481499 (1984-11-01), Arima et al.
patent: 4535315 (1985-08-01), Sakai
patent: 4579643 (1986-04-01), Mase et al.
patent: 4828673 (1989-05-01), Maeda
patent: 4873970 (1989-10-01), Freidank et al.

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