| 摘要 |
A depth sensitive diver safety system to be utilized with underwater breathing apparatus, the safety system including a first automatic ascent control stage which initiates gradual regulated inflation of a personal flotation device upon an air pressure from a pressurized air source of a user dropping to a danger/low air level corresponding a diver's depth, and a second automatic ascent control stage which is structured to initiate gradual, regulated inflation of the personal flotation device upon the diver's depth exceeding a preset safe depth level. The first automatic ascent control stage is connected in line between high and low pressure air sources such that upon a pressure exerted on a sensing piston within a main housing of the first automatic ascent control stage dropping to the danger/low air level corresponding the diver's depth, the breathable air pressure exerted by the low pressure air source on the sensing piston will be sufficient to overcome the air source pressure resulting in seepage of low pressure air into the personal flotation device for filling thereof. The second automatic ascent control stage is connected in line with the low pressure air source and includes a sensing body therein structured to be displaced upon an ambient pressure, which compresses the personal flotation device directing air into the stage, being sufficient to compress a sensing end of the sensing body until the sensing body moves to a valve displacing position that allows air flow to the personal flotation device.
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