Breech mechanism for automatic firearms

Details Breech mechanism for automatic firearms Breech mechanism for automatic firearms

1981-11-12

1984-07-03

Jordan, Charles T.

Firearms

Breech loading

Sliding breechblock

42 16, F41C 1500, F41C 1100

Patent

active

044570929

ABSTRACT:
In automatic firearms having a caliber in the range of about 20 to 40 mm, so-called "jammed shell casings" are occasionally encountered due to the high cadences during the extraction and ejection of the empty cartridge casings, so that the returning breech mechanism tends to lose the cartridge, and the ejector plunger no longer fully impacts against the casing to be ejected. In order to avoid this drawback a recess arranged in the breech head concentrically to the firing pin is provided along its periphery opposite an extractor claw with at least one projection to assist in the centering and retention of the cartridge casing and which can be adapted to the respective type of breech mechanism. The projection is formed by cutting or non-cutting working. Preferably, two or more such projections are formed which then, together with the extractor claw, form a type of "three-point support" for the cartridge casing during the extraction.

REFERENCES:
patent: 476290 (1892-06-01), Mauser
patent: 4066000 (1978-01-01), Rostocil

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