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:
Jun. 23, 1998
Filed:
Aug. 14, 1995
Fred W Watson, Jr, Montross, VA (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
An ammunition cartridge having a reduced propellant charge and an initial duced cartridge volume is provided. The cartridge volume is reduced by partially filling the cartridge case with a foam filler using a male mold form. The male mold form is sized to provide the desired propellant volume and tapered to maintain the desired cartridge pressure during the propellant burn. Alternately, the foam filler may be formed externally and inserted into the cartridge case. In that embodiment, an adhesive retainer is used to secure the foam filler to the base of the case. During firing, the foam filler is turned into a gas, thereby providing the large volume of the case for expansion of the propellant gases. After firing, the case is free of residue, all of the foam filler having been expelled as a gas.