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. 14, 2003
Filed:
Aug. 07, 2001
Dipak S. Kamdar, Maple Grove, MN (US);
Peter L. Langsjoen, St. Louis Park, MN (US);
Todd A. VanSlyke, Rogers, MN (US);
Frank Altamura, Budd Lake, NJ (US);
Alliant Techsystems Inc., Edina, MN (US);
Abstract
A spring disc includes a contiguous outer ring including a first plurality of holes and having a contiguous, upwardly curved portion having an outer edge. A middle ring encompasses a second plurality of holes, and a contiguous inner ring, is encompassed by the outer ring and the middle ring. The inner ring surrounds a central aperture sized to accommodate installation onto a cartridge case member, where the outer ring, inner ring and middle ring operate together so as to support the cartridge case by evenly distributing stresses when installed on a cartridge case. A taper angel &thgr; is built into a bottom with a value of about 1° as measured from the bottom extending radially from the center of the inner ring to the outer edge with reference to a plane parallel to an imaginary plane overlaid on the contiguous outer edge.