Surgery – Truss – Pad
Patent
1987-03-27
1988-03-01
Kamm, William E.
Surgery
Truss
Pad
73705, 7386174, 250214SW, 250231P, A61B 508
Patent
active
047278862
ABSTRACT:
Apparatus for detecting and indicating the commencement of inhalation by a patient under test includes a housing through which a gas flow due to the inhalation is directed. A light source and a light receptor positioned adjacent to transparent portions of the housing define a light path between them which transversely intersects the gas flow, the receptor being adapted to provide an output signal in response to incident light from the source. A movably positioned vane mounted inside the housing and normally biased to a position substantially clear of the light path, moves to a position progressively blocking the light path upon commencement of gas flow due to inhalation. Means responsive to a change in the receptor output signal resulting from blockage of the light path provides indication of the flow due to the inhalation commencement.
REFERENCES:
patent: 3695254 (1972-10-01), Blum
patent: 3802417 (1974-04-01), Lang
patent: 3817238 (1984-06-01), Matson
patent: 4476880 (1984-10-01), Giem
patent: 4509551 (1985-04-01), Luper
patent: 4535780 (1985-08-01), Gur et al.
Conrardy John E.
Fiorani Bruce J.
Pedersen Robert H.
Steinert Mark P.
General Electric Company
Hanley John C.
Kamm William E.
Mollon Mark L.
Stoner Douglas E.
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