Breathing Apparatus
AssigneeGrimsey Marine Technology Limited
InventorPeter Grimsey
Life of this patent
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Abstract
A double counterlung for the breathing circuit of a diver has regulators (41, 51) for automatic addition and venting of breathing gas. Also disclosed is a weighted hinged plate (3) for a double counterlung, to reduce breathing effort when the diver is horizontal. Other improvements to the breathing circuit are described including use of a two stage compressor (151, 155), and single actuator valves for back-up circuits.
Claims17
Double counterlung apparatus comprising a double counterlung, and a circuit for breathing gas, said apparatus further including a first detector to detect minimum volume of said counterlung, and in response thereto to add breathing gas to said circuit, wherein said first detector comprises an inlet regulator responsive to the rate of change of pressure in a return duct of said circuit.
2-3. (canceled)
8-9. (canceled)
Apparatus comprising a double counterlung having three breathing circuits comprising a gas reclaim circuit, a rebreather circuit and an open demand circuit, wherein one of said circuits is selectable on demand by operation of a plurality of on/off valves, and wherein a plurality of said valves are connected for operation by a common actuator.
Dependencies are inferred from the claim text.