Nonmetallic gun barrel

Details Nonmetallic gun barrel Nonmetallic gun barrel

1991-10-11

1993-05-18

Johnson, Stephen M.

Firearms

Barrels

Materials or coatings

42 78, 89 16, F41A 2104

Patent

active

052123286

ABSTRACT:
The invention is a nonmetallic gun barrel having a a longitudinally rigid tubular exterior capable of radial elastic deformation upon passage of a projectile therethrough. Liner segments fixed at the inner diameter of the barrel exterior are abutted end to end and form spiraled rifling structures comprised of shallow channels and ridges between the channels. Radial gaps between sides of the liners can be partly filled by radial projections of elastomeric material of the barrel exterior. The radial projections expand inwardly to seal against a projectile bearing against the inner periphery of the barrel as the projectile is fired from the barrel.

REFERENCES:
patent: 2499944 (1950-03-01), Brace et al.
patent: 2534811 (1950-12-01), Corlett, Jr.
patent: 3517585 (1970-06-01), Slade
patent: 3571962 (1971-03-01), Eig
patent: 3641870 (1972-02-01), Eig

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