Accession Number : ADD000937

Title :   Obturator-Extractor Device for Firearms.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON D C

Personal Author(s) : Post,John S ; Reed,Frederick P

Report Date : 12 Jun 1973

Pagination or Media Count : 6

Abstract : The patent relates to an obturator-extractor which provides safe firing of cartridges having cases made from lightweight materials, such as aluminum, plastics, or other non-metallic materials, in a firearm with a reciprocating bolt. A single piece obturator-extractor device is mounted as a shell on the bolt head and is comprised of convexly formed surfaces which make sealing contact with the barrel chamber and a tubular section which is receivable by a recess formed in the head to receive the rear end of the case. An extractor of cantilever configuration is provided on the tubular section of the obturator for engagement with the extractor groove in the case.

Descriptors :   *Cartridge case extractors, *Patents, Obturation(Ballistics), Gun components, Gun barrels, Extraction, Rifles

Subject Categories : Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE