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:
Sep. 26, 2000
Filed:
Jan. 20, 1998
Mark Harry Wexler, Kent, WA (US);
Peter Andrew Buck, Valencia, CA (US);
Timothy D Iwanczyk, Slidell, LA (US);
Lockheed Martin Corporation, Palmdale, CA (US);
Abstract
An improved fuel tank for a lifting body re-entry vehicle having a particular external shape comprising four elongated lobes each having an external surface, each of the external surfaces having selected cylindrical and conical shapes, the lobes being selectively mateable to form a combined external configuration having a multiplicity of cylindrical and conical shapes conformable to at least a portion of the external shape of the vehicle. The cylindrical and conical shapes have variable radii at selected cross-sections thereof, such radii being selected for forming the external configuration. In a particular embodiment, the fuel tank has an initial portion, a midsection portion and a final portion and the cross-sectional shape of the initial portion of the fuel tank is that of two overlapping circles whose centers are positioned above one another, each of the circles being formed by two of the four lobes. In the midportion of the fuel tank, the cross-sectional shape is that of four overlapping circles whose centers are positioned to form a four-lobed closed arcuate figure. In the final portion of the fuel tank, the cross-sectional shape of the fuel tank is that of two overlapping circles whose centers are positioned aside one another, each of the circles being formed by two of the four lobes. When two such fuel tanks are placed side-by-side, the combined external surfaces closely approximate a large portion of the shape of the re-entry vehicle.