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US 4,114,389 AGranted
Constant volume buoyancy compensator
AssigneeDacor Corporation
InventorsJack L. Bohmrich, William A. Bowden, Jr., Vernon G. Pedersen
Life of this patent
Estimating the term…
Abstract
A diver's buoyancy compensator employs a constant volume chamber which is controllably pressurized with air from the diver's SCUBA tank, and water is admitted to or emitted from the tank by one or the other of two manually operated valves.
Claims10
An underwater buoyancy compensator for use by divers, comprising
- a buoyancy tank adapted to be carried by a diver and having therein a sealable chamber of constant volume,
- gas inlet valve means connected between said chamber and a source of gas under pressure,
- first pressure relief valve means mounted at the top of said tank for connecting the top of said chamber to the ambient when the pressure across said first valve means exceeds a predetermined amount,
- second pressure relief valve means mounted at the bottom of said tank for connecting the bottom of said chamber to the ambient when the pressure across said second valve means exceeds a predetermined amount,
- first manually operable means connected to said first pressure relief valve means for enabling the diver to manually open said first valve means, and
- second manually operable means connected to said second pressure relief valve means for enabling the diver to manually open said second valve means.
3 more elements
Dependencies are inferred from the claim text.