Surgery – Respiratory method or device – Means for indicating improper condition of apparatus
Patent
1977-12-06
1980-02-12
Recla, Henry J.
Surgery
Respiratory method or device
Means for indicating improper condition of apparatus
128716, 73756, A61M 1600
Patent
active
041878426
ABSTRACT:
A pressure monitor for a breathing system is disclosed which includes three switches, each of which is connected to the breathing system and each of which is preset to be changed in state when the switch is connected to a pressure which is in excess of a predetermined threshold pressure. Each of the switches has a different predetermined threshold with the monitor further including signal means, timing means and selector means. The selector means is connected to one of the switches at a time. The timing means is responsive to the one switch connected to the selector and the signal means is connected to the timing means. The signal means is activated by the timing means whenever the system pressure does not exceed the threshold of the switch connected to the selector means within a predetermined time interval. The selector means includes display means for displaying the threshold pressure of the switch connected to the selector means so that the pressure monitored is readily apparent.
REFERENCES:
patent: 2893236 (1959-07-01), Coon et al.
patent: 3060744 (1962-10-01), Savage, Jr.
patent: 3333584 (1967-08-01), Andreasen et al.
patent: 3375721 (1968-04-01), Joesting
patent: 3905363 (1975-09-01), Dudley
patent: 3996926 (1976-12-01), Birnbaum
N.A.D. Inc.
Recla Henry J.
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