Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1980-12-15
1984-08-28
Recla, Henry J.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820029, A62B 704
Patent
active
044677979
ABSTRACT:
A breathing exertion reduction device for attachment to the air delivery regulator of an open circuit self-contained underwater demand breathing apparatus is disclosed. The device comprises, in one embodiment, a conduit or tube connected to a regulator exhaust port, and extending generally upwardly to a conduit exhaust end. The conduit has an effective vertical height not substantially greater than the head of a column of water sufficient to produce a continuous free-flow condition of the regulator. In another embodiment, a branch conduit extends from the main conduit back to the regulator to provide parallel pressure reduction. Other embodiments of the device are adopted to reduce breathing effort with other types of regulators.
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Parkhurst Todd S.
Recla Henry J.
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