Safety system for breathing apparatus

Details Safety system for breathing apparatus Safety system for breathing apparatus

1980-12-05

1983-05-03

Howell, Kyle L.

Surgery

Respiratory method or device

Means for indicating improper condition of apparatus

12820421, 12820523, A61M 1700

Patent

active

043817742

ABSTRACT:
A safety system for use in a breathing system of an anesthesia apparatus including a gas supply circuit and re-breathing or counter lung circuit. The safety system includes pneumatically operated switches, battery-powered monitoring circuitry and alarm circuitry. The alarm circuitry is coupled to the monitoring circuitry to provide an alarm signal in the event that gas pressure in the breathing circuit exceeds a threshold level for a predetermined period of time, irrespective of the mode of operation of the apparatus. The pneumatically operated switches are arranged to minimize battery drainage during operation.

REFERENCES:
patent: 3333584 (1967-08-01), Andreason et al.
patent: 3480005 (1969-11-01), Edwards
patent: 3877467 (1975-04-01), Plicchi
patent: 3906934 (1975-09-01), Haverland
patent: 4148313 (1979-04-01), Bird et al.
patent: 4187842 (1980-02-01), Schreiber

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