Falling breechblock action for a single shot firearm

Details Falling breechblock action for a single shot firearm Falling breechblock action for a single shot firearm

1996-12-09

1997-10-07

Johnson, Stephen M.

Firearms

Breech loading

Sliding breechblock

89 24, F41A 1510, F41C 706

Patent

active

056735057

ABSTRACT:
A falling breechblock action for a single shot firearm, which is easy to make, assemble and disassemble, has an internal firing mechanism and a cooperating underlever. The action has a trigger, a hammer, an extractor and an extractor retainer, and avoids indirect linkages and cams and traditional complex safety mechanisms. The action links the underlever directly to the firing mechanism with a shaft. The underlever indirectly moves the breechblock. The initial downward movement of the underlever rotates the hammer rearwards into the cocked position and renders the complete mechanism safe. Further downward movement of the underlever draws down the breechblock. In so doing, the extractor is actuated by the breechblock. Upward movement of the underlever initially raises the breechblock and subsequently compresses a mainspring which is coaxial with the shaft. Only with the underlever fully up is the action capable of discharging a cartridge. A unique extractor assembly has an extractor with a heel and toe which cooperates with the breechblock to pivot the extractor, and allows the breechblock travel to be regulated for various cartridge sizes. The extractor assembly is removable, thus allowing very rapid disassembly of the entire mechanism.

REFERENCES:
patent: 2749641 (1956-06-01), Hauck
patent: 3735517 (1973-05-01), De Haas et al.
patent: 3830000 (1974-08-01), Browning
patent: 4040196 (1977-08-01), Smith et al.

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