Multi-lug breech mechanism

Details Multi-lug breech mechanism Multi-lug breech mechanism

1990-01-02

1991-05-14

Jordan, Charles T.

Ordnance

Breech closures

Transverse

F41A 310

Patent

active

050145924

ABSTRACT:
A breech mechanism embodies a multi-lug sliding breech block having a pluity of pairs of lugs. At the instant before firing, the bearing surfaces of at least one pair of lugs are spaced a predetermined distance apart from the bearing surfaces of the respective threads, or lugs, of the breech ring. When the cannon is fired, a reactive force acting on the breech block elastically deforms the material of the ring and block, forcing all the bearing surfaces into an abutting contact relationship whereby the stresses produced within the material of the mechanism are more uniformly distributed throughout the breech ring and the breech block thereby increasing the service life of the mechanism.

REFERENCES:
patent: 617110 (1899-01-01), Lynch
patent: 898840 (1908-09-01), Dawson et al.
patent: 1232090 (1917-07-01), Rimailho
patent: 1393353 (1921-10-01), Driggs
patent: 2613576 (1952-10-01), Finn
patent: 2789471 (1957-04-01), Bluford et al.

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