| 摘要 |
A dive mask pressure differential control device is disclosed for protecting a diver from the injurious effects of pressure differentials that can occur inside the dive mask as the pressure of the ambient water increases. The device is pressure sensitive and automatically allows water to pass into the dive mask when the pressure outside the dive mask exceeds the pressure inside the dive mask by a preset limit. In various embodiments, the device may include a manual release, an adjustment mechanism to adjust the activation pressure of the device, a purging mechanism to permit the expulsion of water from the dive mask interior, and a diverter for diverting air bubbles ejected from the device away from the face of the diver.
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