BUOYANCY VEST VENT VALVE WITH RELIABLE SEATING
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United States of America Patent
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May 29, 2017
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Mar 28, 2012
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Abstract
A vent valve for a buoyancy control device (“BCD”) suitable for divers, where the valve may be opened by any combination of over-pressure, manual pressure relief or a powered means, where a force to a valve plug is applied by means of a spring that is constrained to prevent entirely lateral and angular movement but in which movement of the plug in the axis of the seat is unconstrained. An automatic buoyancy control device suitable for free-swimming divers, providing the functions that may include a controlled ascent rate, controlled descent rates, the imposition of a maximum depth limit, the facility to hold a set depth and to follow a dive profile or decompression profile. The device, control process and subsystems provide a high safe failure fraction.
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