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  United States Patent US007213519B2 (12) (10) Patent N0.: US 7,213,519 B2 Wiley et al. (45) Date of Patent: May , 2007 54) COMPOSITE POLYMER BASED 3,659,528 A 5/1972 Santala ..................... .. 102/468 CARTRIDGE CASE HAVING AN 3,797,396 A 3/1974 Reed .............. .. 102/468 OVERMOLDED METAL UP POLYMER 3,842,739 A 10/1974 Scanlon et a1. 102/467 PLUG BASE ASSEMBLY 4,187,271 A 2/1980 Rolston et a1. ........... .. 264/258 4,726,296 A 2/1988 Leshner et al. ........... .. 102/467 (75) Inventors: Sy Wiley, Minden, LA US); William 4,809,612 A 3/1989 Ballreich et a1~ E. Rembert, III, Minden, LA (US); Gary Loftin, Minden, LA (US) (Continued) (73) Assignee: Polytech Ammunition Company, FOREIGN PATENT DOCUMENTS Mlnden, LA Us) WO 88/09476 12/1988 ( * ) Notice: Subject to any disclaimer, the term of his patent is extended or adjusted under 35 OTHER PUBLICATIONS U~S~C- 15403) by 31 days “Green Army ullets to get the lead out” Andrea Stone; USA oday. (21) Appl. N0.: 11/256,687 (Continued) (22) Filed. Oct 24 2005 Primary ExamineriMichael J. Carone ’ Assistant ExamineriBret Hayes (65) Prior Publication Data (74) Attorney, Agent, or F rmiArent Fox LLP US 2006/0075919 A1 Apr. 13, 2006 (57) ABSTRACT Related U s Apphcatlon Data A up and plug assembly of a base for a polymer based (63) Continuation-in-part of application No. 10/695,158, ammunition cartridge case body includes a cylindrical ?led on Oct. 29, 2003, noW abandoned. sleeve joined to the base. The base includes a plug molded (60) Provisional application No. 60/421,782, ?led on Oct. Over 3.01111 “5e mglud?s a ?rst 1211211111211‘ cllllp P911103 29 2002 exten 1ng 1n a rst 1rect1'on rom a We~ orme t ereln an ’ a second annular cup port1on extendmg 1n a second d1rect1on (51) Int Cl from the Web opposite to the ?rst direction. The plug having F43 807 (2006 01) a ?rst annular portion that completely encompasses an outer _ _ circumferential surface of the cup and a second annular gfsl'dcli 112/467’ 102/46146 8/2/3108 portion that extends from the ?rst annular portion. The ( ) 1e 0 assl catl0n10e27g9 86/10 18’ second annular portion of the plug completely covering an See a lication ?le for Com let’e Search l’listo ’ inner surface of the ?rst annular cup portion of the cup. The pp p 1y‘ cup preferably being formed from a metal or a suitable (56) References Cited non-metal and the plug being formed from a suitable poly mer that is injection molded over the cup. U.S. PATENT DOCUMENTS 2,918,868 A * 12/1959 Ringdal .................... .. 102/530 14 Claims, 17 Drawing Sheets 390 312 ‘+- S ‘1\ 365 380  US 7,213,519 B2 Page 2 US. PATENT DOCUMENTS 5,033,386 A 7/1991 Vatsvog .................... .. 102/467 5,259,288 A 11/1993 Vatsvog 5,563,365 A 10/1996 Dineen t al. ............ .. 102/431 5,616,642 A 4/1997 West et al. 5,708,231 A 1/1998 Koon 5,969,288 A * 10/1999 Baud ........................ . 102/466 6,048,379 A 4/2000 Bray et al. 6,101,949 A 8/2000 Maucourt et a1. 6,131,519 A 10/2000 Thiesen et a1. ........... .. 102/469 6,257,149 B1 7/2001 Cesaroni 6,439,123 B1* 8/2002 Dionne et al. ............ .. 102/430 6,539,874 B2* 4/2003 Weise ....................... .. 102/472 6,845,716 B2 OTHER PUBLICATIONS Environmental Update; Update Index/News Room/ PAO Fall 1999 Army Produces Green Bullets. 1/2005 Husseini et al. US. Military “Green Bullet” A echnical Report Association of Firearm and ool Mark Examiners Journal, vol. 31 No. 4, Fall 1999. Don Mikko. http://plastics.about.com/library/glossary, Subject: Nylon, 3 pages. http://plastics.about.com/library/glossary, Subject: Nylon Fiber, 3 pages. http://plastics.about.com/library/glossary, PolyheXamethylene-Adipamide, 3 pages. Subject: A.L. Hyde Company, Nylon, 1 page. http://WWW.eXport911.com/ref, General References, Registered Brand Names of Plastics, 4 pages. Terminology, BISFA 2000, 1.3 Generic classi?cation of synthetic ?bres. * cited by examiner  U.S. Patent May , 2007 Sheet 1 0f 17 US 7,213,519 B2  U.S. Patent May , 2007 Sheet 2 0f 17 US 7,213,519 B2 1 2; Fig. 2 Related Art

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