Title: Buoyancy control valve for scuba diving vests

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Abstract: A buoyancy control valve connected to a source of gas under pressure and to the buoyancy control vest of a scuba diver permits, through the manipulation of a pair of actuators, the use of the energy within the compressed air to forcibly exhaust air from the scuba diver's vest to effect a rapid deflation of the vest. In addition, the same valve permits application of the pressurized air to the vest for inflating the vest and also permits deflation of the vest using pressure differentials without forced assistance from the pressurized air source. Included within the same valve is a pressure differential responsive relief valve which opens in response to excessive pressure within the diver's vest to prevent overinflation of pressurized air to a breathing mask and a forcible exhausting of air from the same breathing mask through the manipulation of a pair of actuators so that an unconscious person or animal may be alternately forced to inhale and exhale for resuscitation. In this use the relief valve is also important since it assures that the person or animal is not injured by high pressure gas entering his lungs and also gives a visual indication when the lungs are full.


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