Title: Fail safe system for a patient triggered respirator

Abstract: A fail safe system for preventing erroneous activation of a device, such as a respirator, is provided to inhibit continuous or free running operation of the device as well as precluding activation of the device within an initial, predetermined portion of a phase in a cycle of operation. A circuit is provided for inhibiting the production of an output activation signal in the event that an input signal is continuously present or present at least at the start of a phase. In addition, a further circuit is provided for establishing a predetermined delay period commencing with the start of a phase for precluding the production of an output activation signal during such a period. Thus, only upon sensing the occurrence of a particular external condition after the aforementioned delay period has expired, will an output activation signal be produced.

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Inventors: Cibulka, Anthony B. (Poynette, WI, US)

Application Number: 516567
Filing Date: 1974-10-21
Publication_date: 1976-04-27
Assignee: AIRCO, Inc. (Montvale, NJ)
Primary Class(es): 128/204.23 340/573.1
Other Classes:
US Patent Ref:

2830580	Apr, 1958	Saklad et al.	128/DIG.
3191595	Jun, 1965	Wilson	128/145.
3357428	Dec, 1967	Carlson	128/145.
3566387	Feb, 1971	Schoener et al.	128/145.
3595228	Jul, 1971	Simon	128/145.
3611178	Oct, 1971	McConnell	128/142.
3678494	Jul, 1972	Setser	340/279.

Other Refs:
Primary Examiner: Michell, Robert W.
Assistant Examiner: Cohen, Lee S.
Attorney: Rathbun; Roger M., Bopp; Edmund W., Mathews; H. Hume