Firearms – Barrels – Choke devices
Patent
1992-03-24
1993-10-05
Johnson, Stephen M.
Firearms
Barrels
Choke devices
42 106, 89 143, F41A 2140, F41A 2128, F41A 2118
Patent
active
052493857
ABSTRACT:
A short length shotgun barrel exhibiting high accuracy and reduced felt recoil, and providing for interchangeability of loads containing shot pellets and slugs. The barrel includes an elongated and tapered forcing cone, a backbored region between the muzzle and the forcing cone, venting ports positioned in the area of the muzzle, and a muzzle region of smaller diameter than the backbored region. The nominal inside diameter of the barrel from the forcing cone to a point adjacent the muzzle is greater than the muzzle diameter. Radially projecting ports are provided in the transition area of the backbored region near the muzzle end of the barrel, and the area surrounding the venting ports is roughened. The forcing cone is elongated and tapered down from the chamber toward the muzzle end of the barrel.
REFERENCES:
patent: 14597 (1856-04-01), Buckel et al.
patent: 157008 (1874-11-01), Kerr
patent: 618901 (1899-02-01), Peterson
patent: 863431 (1907-08-01), Parker
patent: 1858560 (1932-05-01), Rosenstiel
patent: 2054132 (1936-09-01), Lewis
patent: 2323306 (1943-07-01), Campbell
patent: 2742821 (1945-04-01), Sweetman
patent: 3138991 (1964-06-01), Maltev
patent: 4071971 (1978-02-01), Tornas
Calos Carl D.
Vang Hans J.
Johnson Stephen M.
O'Banion John P.
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