Hinge device for firearms
AssigneeFlodman Guns KB
InventorsRune Flodman, Lennart Flodman, Bertil Flodman
Life of this patent
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Abstract
A hinge device for break-open type firearm comprises two pair of arcuate ridges on the breech slidably received in complementary grooves formed in parallel sidewalls of a receiver. One pair of ridges and complementary grooves is located forwardly of the hinge axis, with one ridge and its associated groove on each side of the ridge, and the other pair of the ridges and complementary grooves is located rearwardly of the hinge axis. In the closed position of the firearm, the ridges and grooves are generally upright, so that their flanks or sidewalls include a large angle with the line of action of the recoil forces.
Claims7
A firearm of the break-open type, comprising a receiver having longitudinal side walls, a barrel assembly including a breech positioned between the receiver side walls, and a hinge device connecting the barrel assembly to the receiver side walls for pivotal movement about a transverse hinge axis, said hinge device comprising arcuate ridges having a rectangular cross-section and complementary grooves slidably receiving the ridges, said ridges and grooves being centered on the hinge axis and provided respectively on one and the other of the pair of elements constituted by said breech and said receiver side walls, said ridges and grooves comprising on each side of said breech, two ridge segments and complementary grooves, one of said two ridge segments and the complementary groove receiving it being located forwardly of the hinge axis and the other ridge segment and the complementary groove receiving it being located rearwardly of the hinge axis and having a larger radius of curvature than said one ridge segment and said complementary groove receiving it.
Dependencies are inferred from the claim text.