Patent ID: 6637310
Filing Date: 2003-10-28
Classification: F41A

Abstract:
The rotatable breech gun comprising:a breech assembly having a breech bore formed therein that receives ammunition loaded through an end thereof, wherein the breech assembly has a first end and a second end, and wherein a rotational axis is located intermediate the first end and the second end, a breech housing having at least one side member oriented parallel to the breech bore, wherein the breech assembly is rotatable mounted in the breech housing; and a gun barrel having a gun bore extending therethrough, wherein the gun barrel is operably connected to the breech housing such that the gun bore is aligned with the breech bore when the breech assembly is rotated in position within the breech housing, the gun barrel is aligned along a gun barrel axis and the breech assembly is rotatable about the rotational axis that is substantially perpendicular to the gun barrel axis; wherein the breech assembly and the breech housing further include corresponding mating structures proximate at least one end of the breech bore such that forces generated by ignition of ammunition in the breech bore are transmitted to both the breech assembly the at least one side member of the breech housing, and wherein both the mating structures and the at least one side member operate to maintain a longitudinal position of the breech assembly relative to the breech housing; and wherein the that mating structures comprise at least one groove formed in the breech assembly proximate the first end and the second end and at least one land formed in the breech housing, wherein the at least one groove is adapted to at least partially receive the at least one land, and wherein the at least one groove and the at least one land are both curved to correspond to with a constant radius from the rotational axis.