The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 14, 1978
Filed:
May. 27, 1976
Roger W Buecher, Kailua, HI (US);
Robert T Hoffman, Kailua, HI (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
A salvage apparatus which includes a collapsible bag which has a top and a ottom. A relief valve is mounted at the top of the bag for expelling air from the top of the bag, and a relief valve is mounted at the bottom of the bag for expelling water from the bottom of the bag. A fitting is mounted to the bag for introducing gas or water into the bag so that the rates of descent and ascent of the bag can be controlled. A method of recovering a submerged object includes filling the bag with water, attaching the bag to the submerged object, introducing gas into the bag until the object commences to ascend, and venting air from the top of the bag as the bag ascends to control the rate of ascent.