FI66985C - UTVAEXLINGSBAR TRAONGBORRNINGSHYLSA FOER HAGELGEVAER - Google Patents

Description

R55F1 M «« ANNOUNCEMENT

Ma lJ 1 1 UTLÄGGNI NGSSKAIFT 007 0 0, '^ (51) Kv.Ml F Ai C 21/18 FINLAND — FINLAND 791029 (22) Hikiwi ^ M — Aiwafcmmwtif 28.03.79 (23) ANoipUvl — GlMgtwtadaf 28.03.79 (41) ) TmHiK | «IUmW - Mvk olhmMg OA. 10.79

PmtmM. i · rdritterlhalllty · / 44) NihtMMfm »} · lun ^ uik ^ np ™ .- hllwfr och registontyralMn '7 AmMcmi ottafl Odl Iicijkr * t« a pMbUcarad 31.08.84 (32) (33) (31) Pn * «« r twolkwi »Bfrt prtorkt 03.OA.78 Sweden-Sweden (SE) 7803705-8 (71) (72) Rune Hjalmar Flodman, Stora Garden, PI 2607, Striberg, S-713 00 Nora, Sweden-Sweden (SE) (7A) ) Leitzinger Oy (5A) Interchangeable contraction sleeve for shotgun -

Utväxlingsbar trlngborrningshylsa för hagelgevär

Shotguns loaded with shotguns are used for small game hunting and also for training or competition shooting, such as clay pigeon shooting.

A shot with a fully cylindrical hole gives an unevenly distributed, high hit pattern, and in all shotgun shooting, both hunting and racing, it may therefore be advantageous to change the shape or density of the shotgun's hit surface, especially if the distance is relatively large. In this case, it is customary to use a so-called reduced barrel, which means that part of the shotgun hole near the mouth is conically tapered as it goes towards the barrel. Alternatively, the hole of the shotgun barrel is extended by a so-called constriction piece (constrictor), which is fastened to the barrel mouth with a thread. Examples of such contraction pieces are given, for example, in PR-PS 2 321 104 and US-PS 2 837 856. Such contraction pieces have also been used to change the shape of a shotgun (e.g. SE-PS 357 252).

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It is common for a double-barreled shotgun to have one barrel more reduced than the other, allowing the shooter to choose which hit surface he or she wishes to use in a given situation. For example, in the case of shooting a flying bird or a clay puck, the distance is relatively short and the target speed is high. In this case, "open" shrink drilling is used. The shooter must also aim well in front and launch very quickly. The actual aiming is not actually performed, the shooter only has time to see the target and the grain of the weapon. Due to the forward aim mentioned above, it is difficult to get the right height for the shot, and in such a case, most shooters tend to shoot clearly too low. In recent years, double-barreled weapons, which thus have two barrels on top of each other, have become increasingly common. These guns are easier to aim than the old double-barreled shotguns, where the barrels are placed side by side, but the double-barreled guns tend to give both shots a different height. This is because the centerline of the lower barrel, which is usually fired first, is close to the center of gravity of the weapon, while the upper barrel, which is substantially higher, tends to swing the weapon upwards and give a higher point of impact.

Since said situations are inconvenient for many shooters and lead to unnecessary bypass shots, it is an object of the present invention to allow a shooter to simply change the point of impact of his shotgun to the extent that suits his own needs and shooting style. This object is achieved by a shrink sleeve having the properties set out in claim 1.

In the following, the invention will be examined in more detail with reference to the accompanying drawings, in which:

Figure 1 is an example of a single barrel shotgun with a replaceable contraction sleeve according to the present invention.

Figure 2 is a longitudinal section of the barrel mouth of the shotgun shown in Figure 1.

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Figure 3 is a view taken in the direction of the line III-III in Figure 2.

Fig. 4 is a vertical section of the barrel mouth of a so-called overlapping type double-barreled shotgun, showing another example of the use of a shrink sleeve according to the invention.

Figure 5 is a view taken in the direction V-V in Figure 4.

Figure 6 is a partially sectioned view of a portion of a single-barreled shotgun provided with a second replaceable shrink sleeve in accordance with the present invention.

Fig. 1 schematically shows a shotgun with a shotgun barrel 1 comprising a sight line platform 2 and a grain 3. According to Fig. 2, the barrel has an extension 4, which in this embodiment is a fixedly mounted outer sleeve 4, but which may also be integral with the barrel 1. This outer sleeve 4 has internal threads 5 and has a screwed-in inner sleeve 6, the outer end of which has a knurled ring 7.

The inner sleeve 6 differs from known replaceable shrink sleeves in that it has a through hole or opening which is not coaxial with the longitudinal axis of the shotgun barrel but is inclined upwards at an angle v, which raises the barrel by a distance x resulting in a height difference between the inner sleeve inlet 8 and between point 9. The distance x is indicated in Figures 2 and 3. Due to this shape of the shrink sleeve, the shrink sleeve assembles and compacts the shotgun and further changes the main shotgun direction at angle v. By selecting the bevel angle v according to the shooter's shown. If the shooter tends to aim the weapon green in some other way, he may instead allow the oblique shrink sleeve to direct the main direction of the shotgun in a direction other than obliquely upward. In this case, it is possible to think of directions of movement of the point of impact of the weapon other than raising, all of which, however, depend on the conditions of the weapon or the shooter.

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Figures 4 and 5 show how the invention can be used in connection with a double-barreled shotgun, but this embodiment can also be used for weapons with parallel barrels.

The upper barrel 10 of the weapon has an outer sleeve 12-o attached to the outer end, and the lower barrel 11 of the weapon has an outer sleeve 12-u attached thereto. In this embodiment, both outer sleeves 12-o and 12-u are attached to the pipes by soldering 20 or the like, but the outer sleeves can of course also be made either in one piece with the respective pipes or possibly separately, or they can also be made in one piece and then attached to the pipes.

The outer sleeve 12-o of the upper barrel 10 is coaxial with the hole of the upper barrel. The outer sleeve 12-u of the lower barrel 11 is instead at an oblique angle w to the hole of the lower barrel so that the mouth of the outer sleeve 12-u is elevated by a distance y (see Fig. 5). In Fig. 4, the shrink sleeve 13 is inserted into the outer sleeve or barrel extension 12-o, and the shrink sleeve is held in place by a screw sleeve 15 threaded into the internal thread 14 in the outer sleeve 12-a. 17. The inner sleeve 23 of the lower barrel 11 is correspondingly mounted on the inner barrel extension or the outer sleeve 12-u.

The outer sleeves or barrel extensions 12-o and 12-u have longitudinal grooves 18 which are used to lock the shrink sleeves 12 and 23 against rotation by means of a wedge 19.

In Fig. 4, the shrink sleeves 12 and 23 have the same bevel angle, although the overall bevel of the lower barrel becomes larger due to the fact that the outer sleeve 12-u is also oblique to the hole in the lower barrel 11 of the shotgun.

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Fig. 5 schematically shows how the outer sleeve 12-u increases the barrel distance by a distance y and how the inner sleeve 23 increases this increase by a distance z.

In the embodiments of the invention described above, the replaceable shrink sleeve is attached to the shotgun barrels by means of an internal thread, either directly or by means of an intermediate sleeve. Alternatively, an external thread can be used in the barrel mouth, in which case the shrink sleeve itself or in a separate locking ring has an internal thread for screwing into the barrel mouth. Such an example of the invention is shown in Figure 6.

Figure 6 shows a shotgun barrel 24, the outer end of which is flared to receive a shrink sleeve 25, the sleeve hole of which forms an angle v with respect to the shotgun barrel hole. The shrink sleeve is held in place by an outer ring 26 provided with a knurled surface 27. The outer sleeve 26 has an internal thread 28 which engages the external thread 29 of the shotgun cone.

To reduce the wear of the shrink sleeve according to the invention, the diameter of its inlet end may be somewhat larger than the hole of the shotgun cone, as the inlet end 8 in Fig. 2 shows. This split difference can be used in all embodiments of the invention.

Claims (3)

66985 A replaceable shrink sleeve for a shotgun, which sleeve is directly or indirectly attached to the mouth of a shotgun barrel by a screw thread or by some other means, characterized in that the hole in the shrink sleeve (6, 13, 23, 25) forms an angle (v, w ") of the shotgun barrel (1, 10 , 11, 24) with the axis of the hole to change the main direction of the shotgun and then to change the position of the hit pattern relative to the line of sight. Shrink sleeve according to Claim 1, characterized in that the rotation of the replaceable shrink sleeve (23) is prevented by a keyway and a wedge (18, 19) or a similar device. Shrink sleeve according to Claim 1 or 2, characterized in that the shrink sleeve (13, 23) is inserted into the barrel extension sleeve (12-o, 12-u) and is held in place by a screw sleeve or nut (15) which can rotate the shrink sleeve (13). , 23) but is axially fixed therein by means of an edge flange or the like (16) and a locking ring (17) or other similar part pressed into the screw sleeve. Shrink sleeve according to one of Claims 1 to 3, characterized in that the diameter of the inlet end (8) of the shrink sleeve (6, 13, 23, 25) is somewhat larger than the hole of the shotgun barrel (1, 10, 11, 24).