| 摘要 |
<p>A + R 1 c/w UNDERWATER LIFTING BALLOON Underwater lifting apparatus which is inflatable underwater and has a flexible balloon envelope containing gas and having upper and lower openings. A flexible conduit extending from the upper opening communicates with balloon interior, and has an open lower end. The conduit has a length sufficient to extend downwardly to a position approximately level with the lower opening of the balloon envelope. A harness cooperates with the envelope to provide attachments for lifting, and a positioner cooperating with the conduit to permit the lower end of the conduit to be positioned where desired relative to the lower opening of the balloon envelope so as to control lift of the balloon.</p> |
