Folded delay blowback operating system for automatic hand held f

Details Folded delay blowback operating system for automatic hand held f Folded delay blowback operating system for automatic hand held f

1997-06-10

2000-06-27

Tudor, Harold J.

Firearms

Breech loading

Sliding breechblock

8918702, F41A 344

Patent

active

060791381

ABSTRACT:
An automatic firing system with military applications, that uses the existing state of the art delayed blowback locking mechanism dating from the 1940's. The difference is that the mechanism is located above and in front of the bolt rather than behind the bolt. When firing the weapon, the pressure from the discharge will push directly back on the bolt. The delay rollers apply enough pressure against the bolt to cause a delay before the bolt will move. Once the bolt begins to move it will push the delay rollers up against the delay cam and compression spring. The size and stiffness of the spring combine with the mass of the bolt, cam and rollers to determine the speed which the bolt will travel. The bolt will move back, away from the barrel, pulling the empty cartridge with it. While the bolt continues to move, it will pull the empty cartridge case to the ejection slot in the side of the stock receiver. The empty cartridge case is then ejected by conventional means. At the same time the empty cartridge case is ejected, the spring loaded magazine will push a new cartridge into the barrel opening. Once the empty cartridge is ejected, the delay cam and compression spring will push the bolt forward, contacting the new cartridge. The bolt will than push the new cartridge into the firing chamber and attach to the cartridge in a conventional manner.

REFERENCES:
patent: 3101648 (1963-08-01), Walther
patent: 3407702 (1968-10-01), Cermak et al.
patent: 3738219 (1973-06-01), Febres
patent: 3990346 (1976-11-01), Irwin
patent: 4327626 (1982-05-01), McQueen
patent: 4977815 (1990-12-01), Stephens
patent: 5388500 (1995-02-01), Petrovich
patent: 5447092 (1995-09-01), Dobbins
patent: 5448940 (1995-09-01), Schuetz

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