Surgery – Respiratory method or device – Including body or head supported means covering user's scalp
Patent
1983-10-24
1986-07-01
Recla, Henry J.
Surgery
Respiratory method or device
Including body or head supported means covering user's scalp
12820524, B03C 1102
Patent
active
045973873
ABSTRACT:
A pressure regulatory valve system for a breathing system in a deep diving apparatus comprises a pair of pressure relief valves, one adapted for connection to a gas supply line extending from a source of breathable gas provided by a diving bell to the diving helmet of a diver working out of the bell, and the other being adapted for connection to a gas return line extending from the diving helmet to the bell. The relief valves are adapted to be controlled by differences between the pressure in the helmet and the pressure in the bell so that when the diver moves to levels above that of the bell the relief valve connected to the supply line responds to reducing helmet pressure in an opening manner and vents gas from the supply line to the bell, while the relief valve connected to the return line responds in a closing manner. When the diver moves to levels below that of the bell the return line relief valve responds to increasing helmet pressure in an opening manner to allow gas to pass from the bell into the return lines and the supply line relief valve moves towards closing to raise the supply line pressure. This action of the pressure regulatory valve systems enables the pumps of a push-pull pump system circulating the breathable gas between the bell and the helmet to operate at substantially the optimum pressure rise for the pertaining ambient pressure conditions as sensed in the helment.
REFERENCES:
patent: 3859994 (1975-01-01), Almquist et al.
patent: 3965892 (1976-06-01), Colston et al.
patent: 3968795 (1976-07-01), O'Neill et al.
patent: 4137912 (1979-02-01), O'Neill
patent: 4195628 (1980-04-01), Lubitzsch et al.
patent: 4442835 (1984-04-01), Carnegie
patent: 4450837 (1984-05-01), Ream
patent: 4454878 (1984-06-01), Morrison
Carnegie, deceased Alistair L.
Carnegie, executrix by Norma E.
Recla Henry J.
Reichle Karin M.
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