Ordnance – Cartridge feeding – Movable chamber
Patent
1997-05-23
1999-08-17
Johnson, Stephen M.
Ordnance
Cartridge feeding
Movable chamber
89157, 42 9, F41A 917
Patent
active
059396571
ABSTRACT:
Semiautomatic pistol and ammunition in which the pistol has a grip adapted to be held in the hand of a shooter, a barrel extending in a forward direction from the grip, a magazine of cartridges positioned above the barrel, and an action located within the grip for firing cartridges through the barrel. Cartridges are transferred from the magazine down to the action, and spent cartridge cases are ejected down through the lower portion of the grip. The barrel intersects the grip below the top of the grip at an angle such that the barrel will be aligned axially with the forearm of the shooter when the grip is held in the hand with the top of the shooter's wrist level with the top of the forearm. The action includes a breech which is rotatable between rest and cocking positions, a chamber which rotates with the breech between battery and loading positions, a firing pin carried by the breech, and a rotatively mounted hammer which is moved to a cocked position by rotation of the breech. A cocking lever is located at the bottom of the grip, and loader is connected to the breech for loading cartridges from the magazine to the chamber when the chamber is in the loading position. The cartridge includes a case having a side wall and a head, a projectile having a side wall disposed coaxially about the side wall of the case and a hollow nose extending forwardly of the side walls, and a powder charge which fills substantially the entire region within the case and the projectile. The nose of the cartridge has a flat central area and a circular cutting edge extending peripherally of the central area.
REFERENCES:
patent: 3222989 (1965-12-01), Kamp
patent: 3782242 (1974-01-01), Angell et al.
patent: 3997994 (1976-12-01), Kastner et al.
patent: 4152857 (1979-05-01), Ketterer
patent: 4348941 (1982-09-01), Ketterer et al.
patent: 5259319 (1993-11-01), Dravecky et al.
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