Depth responsive gas control device

Details Depth responsive gas control device Depth responsive gas control device

1982-12-09

1985-07-09

Chambers, A. Michael

Fluid handling

Ambient condition change responsive

Underwater

12820429, F16K 1736

Patent

active

045275823

ABSTRACT:
A device for automatically opening a gas supply valve when the device reaches a predetermined depth, e.g. when diving, has a gas reservoir, a pressure sensing means providing a control signal when the ambient pressure exceeds that of the gas reservoir, and a supply valve which is opened upon receipt of that signal. A preferred embodiment has a flexible diaphragm exposed at its faces respectively to the ambient pressure and to the gas reservoir pressure, and arranged to move an actuator which acts directly or indirectly on the gas supply valve. Underwater buoyancy apparatus, for use for example by a diver, has a buoyancy chamber to which as can be supplied to alter buoyancy, and the device is incorporated between a gas supply and the buoyancy chamber to give automatic increase of buoyancy when a predetermined depth is reached.

REFERENCES:
patent: 2894507 (1959-07-01), Seeler
patent: 3054414 (1962-09-01), Blackwell
patent: 4230140 (1980-10-01), Hart
patent: 4396032 (1983-08-01), Duchesne et al.

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