AU596413B2

AU596413B2 - Multi-purpose rifle system

Info

Publication number: AU596413B2
Application number: AU72776/87A
Authority: AU
Inventors: Timo Juhani Hyytinen
Original assignee: Sako Oy
Current assignee: Sako Oy
Priority date: 1986-05-21
Filing date: 1987-05-12
Publication date: 1990-05-03
Anticipated expiration: 2007-05-12
Also published as: SE8702011L; SE8702011D0; AU7277687A; FI862144A0; IT8720624A0; FI72807C; IT1205107B; FI72807B

Description

AUSTRALIA

PATENTS ACT 1952 596413 Form COMPLETE SPECIFICATION

(ORIGINAL)

FOR OFFICE USE Short Title: Int. Cl: Application Number: Lodged: 72 7 Complete Specification-Lodged: Accepted: Lapsed: Published: Priority: Related Art: I This document conlains the Sarc2",n:ir nts made under LSect.ion rnd is correct for pril ung.

TO BE COMPLETED BY APPLICANT Name of Applicant: SAKO-~ OY Address of Applicant: PL 40101 JYVASKYLA

FINLAND

Actual Inventor: r r Address for Service: CLEMENT HACK CO., 601 St. Kilda Road, Melbourne, Victoria 3004, Australia.

r Complete Specification for the invention entitled: MULTI-PURPOSE RIFLE SYSTEM The following statement is a full description of this invention including the best method of performing it known to me:- ~i

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The present invention relates to a rifle.

Traditionally a rifle includes a long stock, most commonly made of walnut, in which case the contribution of the wooden stock to the manufacture and appearance of the rifle is important. Rifles are also known in which the stock is made of a manufactured material. Evident advantages of a stock of manufactured material are good fitting of the stock on the iron components, good mechanical strength, good resistance to weather phenomena, which means that even when wet the stock is not twisted, thereby affecting the accuracy of the rifle. It mal' be considered a drawback of the stocks of manufactured material that they are unpleasant when the rifle is handled. From the US Patents 4,027,416 3,766,677, 3,680,241 and GB Patents 1,210,679, 1,136,*62, and 1,117,882 rifles are known in which a separate middle stock piece is used. To the middle stock piece, the rear stock can be attached by means of screws, and so also the front stock, likewise by means of screws.

The object of the present invention is to provide a rifle which can be modified for different purposes.

According to the invention there is provided a rifle comprising: a multi-purpose stock, said stock including a front stock portion detachably connectable to a middle stock portion, and a rear stock portion detachable connectable to said middle stock portion, said middle stock portion provided with means for locating said front and rear portions on said middle stock portion, wherein said front stock portion is selectable from a plurality of different front stock portions and said rear stock portion is selectable from a plurality of different rear stock portions, whereby, in use, the rifle can be modified to suit a selected purpose.

Thus around the middle stock, a rifle suitable for different purposes can be assembled. For example, it is possible to form a hunting rifle or a target-shooting rifle. The middle stock is provided with beddings or fitting parts for locating B /17parts optionally attachable to the said stock. The said

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h~ j I-----UcUv 2 optionally attachable parts include the rear stock, the front stock, and the breech of the rifle, as well as the trigger guard and the magazine of the rifle. The fitting and bedding parts on the middle frame are adapted for the said optionally attachable parts, i.e. the said fitting portions on the optionally attachable parts are of equivalent sort.

In a preferred embodiment of the invention, the middle stock of the rifle is composed of material, preferably of plastic material. In a second embodiment, the middle frame is made of aluminium. All the precise machinings will be in the area of the said r 'ddle stock, such as the fitting of the breech and of the recoil checks, guides for the magazine, and the trigger guard.

The stock at the rear of the weapon can be attached by means of a bolt passing through the stock of the rifle, or by means of 15 some other, corresponding attachment. The front stock is attached to the middle frame of the weapon advantageously by means of screws.

In the following, the invention will be described in detail with reference to some preferred embodiments of the invention shown in the figures in the accompanying drawings, it is understood the invention is, however, not supposed to be confined to the said embodiments alone.

Figure 1 is a side view of a rifle in accordance with the invention, the rear stock being shown partly in section so as to illustrate the central fastening of the rear stock.

Figure 2 shows a second type of construction of a rifle constructed in accordance with the invention.

Figure 3 shows a third type of rifle with an optical sight, assembled and constructed in accordance with the invention.

Figure 4 is an axonometric and schematical illustration of the middle frame.

Figure 5 shows a section through the middle frame along line I-I in Fig. 4.

Figures i, 2 and 3 show a rifle system solution in accordance with the invention. According to the invention, one and the same middle stock 20 is used. In the rifles shown in .3: 3 Figures 1, 2 and 3, separate and different rear and front stocks 30', 30" and 40, 40', 40" have been fitted on the same middle stock portion 20. A breech 50 is attached to the middle stock in Fig. 1. In fig. 2, another, different breech 50' is shown S 5 as attached to the said corresponding middle stock portion Correspondingly, in Fig. 3 a breech 50" is attached to the said 1 same middle frame 20. Thus, the rifle of the invention composes Sone and the same middle stock portion 20 as well as attachment components, which include rear stocks 30, 30', 30" different from each other; front stocks 40, 40',40" different from each other, and metal components of the weapon different from each other, I such as breeches 50, 50', 50". A front stock 40 and a rear stock can be attached to the middle stock 20, but such a combination i is also possible in which both a front stock 40 and a rear stock 1t 15 30' or 30" are attached to the middle stock 20. Correspondingly, the said interchangeability is also possible in respect of the i iother parts to be attached. Thus, always depending on the situation of use, it is possible to choose, the front stock and the rear stock of the rifle as desired. Likewise, the rifle hunting rifle, and vice versa. The middle stock is made favourably by casting out of a manufactured material and favourably by casting out of plastic. Such an embodiment is also possible in which the middle stock is made of alumi.nium by casting.

F By means of the said casting of the middle stock, J precise beddings or fitting zones are obtained for the said parts to be attached. The parts 50, 50', 50" and 40 40', 40" and V1 hf 30,30',30" and 26, 26', 26" to be attached to the middle stoc]:- 20 are provided with complementary attachment and guide zones so that, in the weapon system of the invention, the said optionally attachable parts can be fitted to the same beddings 21,22,23 and 24 on the middle stock In Fig. 1, a rifle 10 in accordance with the invention is shown as a side view. The rifle includes a middle stock portion 20, made of a manufactured material. The middle stock portion 20 is preferably made of plastic material. The middle 3i 4 stock portion 20 is also made preferably by casting out of plastic.

The middle stock portion 20 comprises precise fittings or beddings 21,22,23 and 24 both for the rear stock 30 and for i 5 the front stock 40 as well as for the metal parts of the weapon.

Likewise, the middle stock 20 may have precise fittings 24 made by casting for the magazine 25 as well as for the trigger guard 26. The firing mechanism with the trigger is denoted with i reference numeral 27. The middle stock 20 is likewise provided with fittings for the metal parts of the rifle, both for the I breech 50 and for the related barrel The rear stock 30 of the rifle can be attached detachable, by means of fastening means 31, to the middle stock of the rifle made of a manufactured material and preferably of plastic. The said fastening means 31 consist preferably of a Sscrew 32, which is fitted passing through a through bore 33 in the rear stock 30. The screw 31 can be threaded into a counterrecess 34 in the middle stock 20. The rear stock 30 is fitted in a precise position on the middle stocl zO by means of beddings 21. The front stock 40 is fitted in beddings 22 made by casting into the middle stock 20 of manufactured material. Moreover, the front stock 40 is preferably supported on the barrel 55 of the weapon by means of attaching member 41. The attaching member 41 preferably consist of a screw 42a and of a band iron 42b surrounding the barrel 55. Moreover, the front stock 40 is z.ttached to the middle stock 20, made of a manufactured material and preferably of plastic, by means of fastening members 43. The said fastening members 43 may preferably consist of a screw. The screw 43 is fitted passing into a counter-recess 28 in the middle stock 20 of artificial material. The said counter-recess may be a threaded hole. The threading in the said hole is preferably formed right in the casting stage, being thereby of cast plastic.

As was stated above, Figures 2 and 3 show rifles of different types, which can now be assembled by using one middle stock 20 in accordance with the invention. The beddings on the middle stock 20 are suitable for alternative metal components of Sthe rifle, such as the breech, and for the stock parts of the

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ti io 4

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i 15

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II 4 11 1 i CL 2O rifle, i.e. the rear stock and front stock. I this way it is possible to assemble rifles of different types around the same middle stock.

In Fig. 4, a preferred embodiment of the middle stock is shown schematically. The middle stock 20 is preferably made of one piece of casting. In the embodiment shown in the figure, the said middle stock 20 is made of plastic material.

The middle frame includes beddings or guide and fastening parts 21, 22 and 23 both for the metal parts of the rifle and for the rear stock and the front stock of the rifle. Also, the middle stock 20 includes guides or corresponding beddings 24 for the magazine 25 of the rifle. The middle stock 20 includes a plate 60, which is fitted running transversely to the longitudinal axis X of the middle stock 20. The said plate 60 is provided with a counter-recess 34 or equivalent, into which the screw 32 is fitted threadable, whereby the rear stock 30 is attached to the middle stock 20. The end 70 of the middle stock 20 that is placed next to the rear stock 30 is provided with beddings 21.

They may consist of advantageously guide-like parts placed inside and favourably also of wedge-shaped casting parts 21a placed inside the middle stock 20 and fitted to guide the rear frame precisely into its position. The beddings 21 may advantageously also consist of a recess F 1 formed in the outer face of the middle stock 20. The recess face F 1 is fitted so as to form a bedding 21b while being an edge part formed by the border line between the middle area F 2 and the recess area F. of the middle stock

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In the hollow interior space 100 of the middle frame S 20, there are beddings 23 for the lock body 50 as well as for the barrel constituting an extension of same. The beddings 23 may consist of longitudinal guide-like rib parts, which are made by casting together with the rest of the middle stock 20 of manufactured material. The said rib parts 23a,23b,23c,23d are fitted to be located in such a way in the middle stock 20 that the breech 50 of the rifle can be fitted in a precise position relative the middle stock 20 and that it is, moreover, held in Sits position and fitted in its place by means of at least one

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KI 6 I bedding 23a. It fixes the breech 50 to the middle stock 20 by means of a counter-recess 23a'. In the middle stock 20, there are also beddings 24 which are fitted to guide the magazine g The said beddings 24 are made as one casting with the rest of the middle stock 20. They are rihb-shaped parts and are fitted as running perpendicularly to the central axis X of the middle stock They are placed on the walls 120 and 130 defining the central hollow space 100.

In the embodiment of the invention shown in Fig. 4, at 1i 0 the end 80 of the middle stock 20 placed next to the barrel, a part 110 projecting from the rest of the middle stock is placed, which is used both for precise fastening of the barrel and for precise positioning of the front stock. The face portions F 3 outside the end 80 of the middle stock 20 are recessed relative the middle area F 2 The middle stock 20 area F 3 placed next to the end 80 is placed at a level substantially lower than the i middle area F 2 The border edge between the area F 3 and the area

F

2 forms a bedding 22c for the front stock. Its function is to attach and to position the front stock in a precise position i 20 relative the middle stock 20. In the area F 3 preferably guide- 7 shaped fittings or beddings 22a and 22b are placed, which are in this embodiment bedding ribs parallel to the longitudinal axis X of the middle stock 20. Their function is likewise to position the front stock 40 precisely relative the middle stock 20 and, Sat the same time, relative the barrel 55 and the breech 50 of Sthe rifle. The front stock 40 of the rifle is attached to the Sprojecting portion 110 of the middle stock 20 by means of fastening members 43 and preferably by means of a screw.

p" ~Fig. 5 shows a cross-section of the middle stock along the line I-I in Fig. 4. In the illustration in the figure, the inside beddings 23d I and 23d 2 made as a single cast are seen, which said beddings are supposed to fit the barrel in a precise position. From the figure, the edge portion 22c I is seen, which is fitted so as to place the front stock 40 in a precise position relative the middle stock 20. Likewise, at the other side of the central axis X, there is a corresponding bedding part 22c 2 The function of the ribs 22b 1 and 22b 2 is to guide the front stock *1 7 into a precise position on the middle stock 20. The bottom of the said projection part 110 on the middle stock 20 consists of the wall part 140. In the said part, there is a bore 28 for the screw 43.

The middle stock 20 of manufactured material consists of a symementric frame portion A and B placed at two sides of the substantially central space 100. The entire middle stock 20 may be formed as a single cast. An embodiment is also possible in which the middle stock 20 is formed of two cast parts so that the halves, parts A and B, are attached to each other upon casting along a central joint line G.

In an embodiment of the invention, a wooden rear stock and a wooden front stock 40 are attached to a middle stock 4 made of a manufactured material, preferably of plastic material.

In a second embodiment of the invention the middle stock 20 is provided with a wooden rear stock as well as with a trigger guard and a front stock of a material similar to the material of the middle stock, i.e. a manufactured material.

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Claims

4. A rifle according to claim 3 wherein a number of said ribs are provided on the inside surface of said channel member, for seating a breech. A rifle according to claim 4 wherein said middle stock portion further comprises means for guiding an ammunition magazine into communication with said breech. 4. A rifle as claimed in any one of the preceding claims, 9 wherein the rear stock portion is attached detachably, by fastening means, preferably a screw, to the middle stock portion of the rifle.
7. A rifle as claimed in claim 6 wherein said fastening means, is passed centrally through the rear stock portion through a through bore, and that the rear stock portion is fitted by said locating means on the middle frame of manufactured material in its position on the middle stock portion.
8. A rifle as claimed in any one of the preceding claims, wherein that the front stock is fitted in a precise position on the middle stock portion by said locating means and is attached to the middle stock portion detachably by second fastening means.
9. A rifle as claimed in any one of the preceding claims, wherein the front stock is further supported on a barrel of the rifle by third fastening means. A rifle according to any one of the preceding claims I| wherein said middle stock portion is composed of a manufactured material.
11. A rifle according to claim 10 wherein said material is one of the group comprising plastic and aluminium.
12. A rifle according to claim 10 or 11 wherein said middle stock is made as a single cast piece.
13. A rifle according to claim 10 or 11 wherein said middle S -S n, r e-t I c stock is constructed of twolsj odr cast pieces.
14. A rifle according to any one of the preceding claims wherein said front and rear stock portions are composed v of wood. NT 0~ nnre aasnrr 1C A rifle substantially as herein described with reference to and as illustrated in any one or more of the accompanying drawings. DATED THIS 23TH DAY OF NOVEMBER 1989 SAKO-VdMiME OY j By Its Patent Attorneys: GRIFFITH HACK CO. Fellows Institute of Patent Attorneys of Australia 1i I I P A S S S «1