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  USO05259288A O United States Patent [191 [11] Patent Number: 5,259,288 Vatsvog [45] Date of Patent: Nov. 9, 1993 [54] PRESSURE REGULATING COMPOSITE 3,185,094 5/1965 Zchfeld ............................... 102/38 C RTRIDGE 3 369 443 2/1968 Shansey . . . . . . . . . . . . . . . .. 86/10 3,749,020 7/1973 Weyhmuller ...................... . 102/38 [76] Inventor: Marlo K. Vatsvog, 3110 W. Fairway Dr., Coeur d’Alene, Id. 83814 Primary Examiner-J. Woodrow Eldred [2n Appl. No‘: 953,686 Attorney, Agent, or Finn-David L. Garrison [22] Filed: Sep. 28, 1992 [57] ABSTRACT A lastic cased metal headed ammunition casing for Related US. Application Data high powered ri?e and cannon cartridges is described in [60] continuatiomimpm of sen No_ 706,310, May 28, which the plastic case has a pressure regulating baf?e or 1991, Pat. No. 5,151,555, which is a division of SCI. No. Wall in the forward and thereof to regulate and control 494,918, Mar. 12, 1990, Pat. No, 5,033,386. the development of chamber pressure and directs pres [51] Int. c1.5 .......................... F4213 3/00; F42B 5/02 5 im° a space m‘md “? We me mjw?e rim [52] US. Cl. ......................................... 86/10; 86/23; ‘0 movement of the projscnle‘ The cartridge is charged 102/430; 102/467 with a given charge of powder and the cap or head [58] Field of search ............. _ 102/430, 439, 466, 467; 596* 1Y fastened ‘0 the award °rti° °f the Plastic 36/10, 23, 25 casing. An expandable sleeve may be used to stabilize the head-casing inter?t. The head provides sufficient [56} References Cned resistance to the residual pressure after ?ring so that the U.S. PATENT DOCUMENTS cartridge can be used in rapid ?re automatic weapons. 2,862,446 12/1958 Ringda] ............................... . 102/38 3,099,958 8/1963 Daubenspeck et al. ............ 102/42 14 Claims, 5 Drawing Sheets  US. Patent Nov. 9, 1993 Sheet 1 of 5 5,259,288 2 —— 1.4:; 4 2 .60 H as‘ 6 F'IC5.3  US. Patent Nov. 9, 1993 Sheet 2 of 5 5,259,288 FIG 4  US. Patent Nov. 9, 1993 Sheet 3 of 5 5,259,288 I4 W79

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