Breech closure for a barrel-type firearm

Details Breech closure for a barrel-type firearm Breech closure for a barrel-type firearm

1995-03-23

1996-07-16

Johnson, Stephen M.

Ordnance

Breech closures

Gas checks

89 24, 89 2713, F41A 376

Patent

active

055356605

ABSTRACT:
A breech closure for a barrel-type firearm is described, in which a flow passage for an igniting jet from an igniting cartridge held in a magazine extends through a breechblock. The breechblock is formed on that side which faces the magazine with a cylindrical recess, which is coaxial to the flow passage for the igniting jet and contains a metal sealing cup, the side wall of which contacts the peripheral surface of the recess and which has a bottom, which is formed with a central through opening for receiving the igniting jet and constitutes a conical disk spring, which bears on the contacting surface of the magazine around said through opening, the rim of which is enlarged to form a bead on the inside of the cup.

REFERENCES:
patent: 3354780 (1967-11-01), Ramsay
patent: 3707900 (1973-01-01), Hornfeck et al.
patent: 4195550 (1980-04-01), Witt et al.
patent: 5054365 (1991-10-01), Wissing

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