Surgery – Respiratory method or device – Including body or head supported means covering user's scalp
Patent
1978-03-06
1980-09-09
Recla, Henry J.
Surgery
Respiratory method or device
Including body or head supported means covering user's scalp
12820128, 12820522, 12820524, A62B 702, A62B 1704
Patent
active
042212162
ABSTRACT:
There is disclosed an emergency escape breathing apparatus comprising a hood to be placed over a person's head and a pressured bottle supply of air or oxygen enriched air. The hood is formed of thin film, clear plastics in a tent structure having a bottom wall formed of a thin film elastomer. The elastomer film has an aperture of sufficient diameter to permit the hood to be pulled over the wearer's head and yieldably seals about the wearer's neck, functioning as an exhalation valve, maintaining adequate pressure to keep the hood inflated. The device is provided with a valve on the air supply bottle which has a reseatable valve member and two stages of flow control; the first stage being pressure control, providing a variable flow area which increases with declining pressure in the air supply bottle, and the second stage being flow control having a fixed diameter orifice. The reseatable valve member and flow control elements are all combined in a single unitary valve structure.
REFERENCES:
patent: 2262522 (1941-11-01), Yant et al.
patent: 2296338 (1942-09-01), Dakin
patent: 3043302 (1962-07-01), Spears et al.
patent: 3250292 (1966-05-01), Mollick
patent: 3562813 (1971-02-01), Origer
patent: 3618689 (1971-11-01), German
patent: 3762407 (1973-10-01), Shonerd
patent: 3911914 (1975-10-01), Johansson
Recla Henry J.
Robertshaw Controls Company
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