Breech sealing means for automatic firearms adapted to fire caseless ammunition

• US 3,114,290 A
• Filed: 10/12/1962
• Issued: 12/17/1963
• Est. Priority Date: 10/12/1962
• Status: Expired due to Term

• Current Assignee: Earle M. Harvey, Frederick P. Reed
• Original Assignee: Earle M. Harvey, Frederick P. Reed
• Inventors: Harvey, Earle M., Reed, Frederick P.
• Application Number:
  US04/230,297
• Time in Patent Office: 431 Days
• US Class Current: 89/26
• CPC Class Codes: F41A 3/74 Obturating or packing devices for gas leak prevention in breech mechanisms
• CPC Class Codes: F42B 5/18 Caseless ammunition; Cartridges having combustible cases
• CPC Class Codes: Y10S 102/70 Combustilbe cartridge

Claims

1. IN A FIREARM, A FIXED BARREL HAVING A FIRING CHAMBER THEREIN ADAPTED TO SEAT A CASELESS CARTRIDGE WITH A COMBUSTIBLE PRIMER IN THE REAR END THEREOF, A RECIPROCAL BOLT HAVING A RECESS IN THE FRONT FACE THEREOF FOR RECEIVING THE REAR END OF THE CARTRIDGE AND HAVING A FIRING PIN HOLE THERETHROUGH IN COMMUNICATION WITH SAID RECESS, A FLEXIBLE DIAPHRAGM HAVING AN INTEGRAL STRIKER PROJECTING FORWARDLY THEREFROM, MEANS FOR RETAINING SAID DIAPHRAGM WITHIN SAID RECESS WITH SAID STRIKER NORMALLY OUT OF CONTACT WITH THE PRIMER IN THE CARTRIDGE, RESILIENT MEANS ENCIRCLING THE REAR END OF THE CARTRIDGE IN CONTACT WITH THE INTERFACE BETWEEN SAID BOLT AND SAID BARREL, AND A FIRING PIN SLIDABLY DISPOSED IN SAID BOLT FOR FLEXING SAID DIAPHRAGM TO ADVANCE SAID STRIKER INTO FIRING CONTACT WITH THE PRIMER IN THE CARTRIDGE WHEREBY SAID DIAPHRAGM AND SAID RESILIENT MEANS RESPECTIVELY OBTURATE SAID FIRING PIN HOLE AND SAID INTERFACE BETWEEN SAID BOLT AND SAID BARREL IN RESPONSE TO THE PRESSURE GENERATED BY THE COMBUSTION GASES EVOLVED UPON THE FIRING OF THE CARTRIDGE.