Firearms – Breech loading – Upward-tilting breech
Patent
1983-08-12
1985-09-17
Jordan, Charles T.
Firearms
Breech loading
Upward-tilting breech
42 75D, F41C 1108
Patent
active
045411921
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
(a) Field Of The Invention:
This invention relates to firearms of the break-open type, that is, firearms in which the action is opened by breaking the barrel assembly including the breech about a transverse hinge axis relative to a receiver attached to the butt and having a pair of longitudinal side walls accommodating the breech between them and pivotally connected with the breech by a hinge device. More particularly, the invention is concerned with the hinge device.
(b) Prior Art:
Different forms of hinge devices for break-open firearms are known in the art. The predominant form includes a pivot pin or trunnions defining the hinge axis and sometimes associated with lugs or other elements providing additional surfaces aiding in carrying the recoil forces. Even if such additional surfaces are present, the combined area of the surfaces carrying the recoil forces is relatively small with this form, which also requires a foregrip fitting to hold the hinge device together.
In view of the tendency to use more powerful cartridges, and the increased recoil forces resulting therefrom, a demand for sturdier hinge devices has developed.
Attempts have been made to provide sturdier hinge devices. SE-B-363 893 illustrates an example of an improved hinge device, which comprises semi-circular ridges on the receiver side walls slidably received in complementary grooves formed on the lateral faces of the breech. In a modification of this form, the ridges are formed on the lateral faces of the breech, while the grooves are formed on the inner sides of the receiver side walls.
While the above-mentioned form is advantageous in some respects, it is unsatisfactory is that it does not lend itself to economical production of the receiver in monoblock form and in that its ability to carry heavy recoil forces is insufficient. Moreover, it does not facilitate assembly and disassembly of the main parts of the firearm.
SUMMARY OF THE INVENTION
The object of the present invention is to alleviate the above-mentioned disadvantages and provide a firearm hinge device which is easy to make, assembly and disassemble and which is sturdy and capable of efficiently carrying heavy recoil forces.
In a firearm embodying the invention, the surfaces carrying the recoil forces can readily be dimensioned and oriented so as to withstand the recoil forces efficiently, even after extended use of very powerful cartridges. Moreover, when the main parts of the forearm are being assembled or separated from one another, two parts of the hinge device spaced by a large distance simultaneously guide the relatively moving elements and thereby greatly facilitate the manipulation of the main parts. A further advantage is that no foregrip fitting is required to hold the hinge device together.
The invention will be more readily understood from the following detailed description of an exemplary embodiment, reference being had to the accompanying drawings.
ON THE DRAWINGS
FIG. 1 is a side elevational view of a break-open type firearm incorporating the hinge device of the invention, the firearm being shown in the assembled and closed position;
FIGS. 2 and 3 are views similar to FIG. 1 but show the firearm respectively in the broken position and in an initial stage of assembly of the main parts.
AS SHOWN IN THE DRAWINGS
As shown in FIG. 3, the firearm is a double-barrelled shotgun of the over/under type, the two barrels 1 and 2 of which are secured to a breech 3 to form therewith a barrel assembly. A foregrip 25, only partially shown in FIG. 3, also forms part of the barrel assembly. A receiver 4 secured to the butt 24 (also only partially shown) comprises a pair of parellel longitudinal side walls 5, only one of which is shown in the drawings. The receiver 4 pivotally mounts the breech 3 by means of a hinge device which is described in greater detail. Since the invention is primarily concerned with the hinge device and elements closely associated with it, several components of the action of the firearm have been omitted from the dra
REFERENCES:
patent: 804349 (1905-11-01), Stendebach
patent: 1924656 (1933-08-01), Ribe
patent: 4199886 (1980-04-01), Deuring
Flodman Bertil
Flodman Lennart
Flodman Rune
Flodman Guns KB
Jordan Charles T.
Parr Ted L.
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