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:
Jan. 10, 1995
Filed:
Sep. 30, 1992
Eugene C Fischer, Stevensville, MD (US);
Roger M Crane, Arnold, MD (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
A double hull structure includes a controllably crushable stand-off struce for maintaining a separation between inner and outer hulls and may be retrofit onto existing hulls either in modular and/or break-away sections or as a complete 'shoe' enclosing the existing hull. This retrofittable hull is preferably of a non-metallic composite material which reduces or eliminates corrosion of the existing hull, extending the usable lifetime thereof. The controllably crushable stand-off structure is designed to provide sequential failure, preferably by sequential energy absorbing brittle fractures with little elastic deformation, to provide protection of the existing hull during collisions and/or groundings and thus enhance cargo containment. The brittle fracture is preferably provided by the use of non-metallic composite material in beams of the stand-off structure and/or the inclusion of syntactic foams.