Patent
1978-01-23
1981-07-07
Blix, Trygve M.
9319, B63C 920
Patent
active
042766699
ABSTRACT:
A flexible flotation envelope is detachably secured to a belt encircling the wearer's chest beneath his armpits. Adapted to be supported on the user's back with its lower end connected to the belt is a container for a vertical compressed air or oxygen flotation gas supply tank or cylinder provided at its upper end with a rotary gas distribution valve. The valve contains a rotary valve member rotatable between open and closed positions respectively opening and closing gas flow through the valve to the envelope and having its opposite ends connected to the inner ends of parallel valve-operating lever arms, the outer ends of which are connected to the opposite ends of a valve-operating float. A flexible tube extends from the valve casing to the envelope by way of one arm of a Y fitting, from the other arm of which runs a flexible tube to an alarm whistle by way of a flexible inflatable bladder. Shoulder straps are connected to the upper end of the compressed gas tank container and are adapted to pass over the shoulders of the wearer to the front of the belt. Optional manual rotation of the rotary valve member is provided by wearer-operated flexible cords extending backward over the user's shoulders to the lever arms adjacent the float.
REFERENCES:
patent: 380860 (1888-04-01), Chambers
patent: 1849637 (1932-03-01), Peternella
patent: 2774979 (1956-12-01), Moran
patent: 2895147 (1959-07-01), Desjarlais et al.
patent: 3147499 (1964-09-01), Nelson et al.
patent: 3228045 (1966-01-01), Shepherd et al.
patent: 3324816 (1967-06-01), Vogelsang
patent: 3877098 (1975-04-01), Braly
patent: 3942468 (1976-03-01), Olofsson
Blix Trygve M.
Douglas Winston H.
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