CA1147106A

CA1147106A - Cleaning means

Info

Publication number: CA1147106A
Application number: CA000336785A
Authority: CA
Inventors: Teuvo T. Korpi
Original assignee: FIN-FINISHING Ltd Oy
Current assignee: FIN-FINISHING Ltd Oy
Priority date: 1978-10-03
Filing date: 1979-10-02
Publication date: 1983-05-31
Also published as: DE2939061A1; GB2033558B; SE7908033L; IT1123413B; FR2438248A1; IT7926185A0; BE879126A; IT7922732V0; AU5141879A; JPS5551297A; GB2033558A; FR2438248B1; FI783003A

Abstract

ABSTRACT
A cleaning means for treating the interior surface of the barrel of a firearm. As treating elements of the cleaning means there is a relatively great number of flexible strips of abrasive cloth or the like. The strips are arranged in the form of a whisk, whereby at least a part of the strips penetrate into the rifling grooves of the barrel. Cleaning units comprising an abrasive strip whisk are preferably made to fit on a conventional barrel cleaning brush.

Description

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CLEAN I NG MEANS

The invention relates to a cleaning means for treating the interior surface of the barrel of a firearm.
Conventional cleaning means ~or the interior surface of the barrel of a firearm are intended for the cleaning of barrels which are not chrome-plated. The interior surface of an un-chrome~plated barrel is relatively soft and cannot withstand hard cleaning means. On the other hand, a chrome-plated barrel can be cleaned with considerably harder cleaning means, whereby the cleaning also will be more effective and can be carried out faster.
An object of the invention is to create a new cleaning means intended to be used in particular in chrome-plated barrels, which means also is effective for cleaning the bottom of the rifling grooves of the barrel. A cleaning means made in this way works effectively and is not harmful for the interior surface of a correctly hard chrome-plated barrel. It can also be used for cleaning an un-chrome-plated barrel if the desired result is not obtainable by using conventional cleaning means. Also other treatment of such a barrel is feasible, for instance, modification of its form or dimensions and improvement of its surface quality.
The abrasive strips of a cleaning means according to the invention may be attached to the body portion of a cleaning unit either at one end or at both ends. It is ,r ~

easier to produce cleaning units according to the first alternative, while again it is easier to form cleaning units according to the second alternative so that they fully correspond to the rifling profile of the barrel.
Usually, the first mentioned alternative is more favourable, but in barrels of a very small caliber, a cleaning unit according to the second alternative may be more favourable. The abrasive strip whisk may also be two-sided so that the abrasive strips are attached at their middle portion and form two whisks facing opposite directions.
The abrasive strip whisk is in the easiest way produced from a band of abrasive cloth or the like, which from the side or at the middle is cut crosswise to form strips. The cut band is wound into a roll, whereby a whisk is formed. The whisk cylinder is preferably hollow and it is of advantage that it comprises at least two full turns of the abrasive band.
The most effective cleaning is obtained, if the width of the abrasive strips approximately corresponds to the width of the bottom of the rifling grooves of the barrel.
The best results are obtained if abrasive strips with a coarseness of about 200 to 400 mesh are used.
The hollow abrasive strip cylinder fits well on a conventional barrel cleaning or oiling brush. The brush is flexible to such an extent that it fits inside the abrasive strip cylinder and the hairs of the brush spread ;.

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~7~6 the abrasive strip whisk and press the strips well also against the bottom of the rifling grooves. By this means a very effective cleaning means is obtained that has the advantage that barrel treatment brushes already available together with their shaft can be used.
The cleaning unit should preferably be fitted to rotate freely on a shaft when used for barrel cleaning.
If an ordinary barrel cleaning brush is used to hold the cleaning unit, the free rotation can easily be obtained by lQ unscrewing the brush a few turns and leaving it to rotate on the threads connecting it to its shaft.
In the following, the invention will be descrlbed more in detail with reference to the attached drawing, in which:
Figure 1 shows a band blank for a cleaning unit according to the invention;
Figure 2 shows a band blank for another cleaning unit according to the invention;
Figure 3 shows a cleaning unit made from a blank according to Figure l;
Figure 4 shows a cleaning unit made from a blank according to Figure 2.
In the drawing, numeral 1 indicates a band of abrasive cloth or the like from which a cleaning unit according to the invention is made. The band 1 is cut from the side IFigure 1) or at the middle (Figure 2) crosswise into small strips 2. Thereafter, the band is wound into a roll, whereby a cleaning unit according to Figure 3 or .. : . ~

Figure 4 is formed. If the band is cut to form strips from both sides, a double whisk is formed, the both halves of which correspond to the cleaning unit according to Figure 3.
The cleaning units according to Figures 3 and 4 are made by winding a cut-up abrasive band about two turns.
In the middle a through-going opening 3 has been left so that the cleaning unit fits on a conventional barrel treatment brush. In the body portion 4 of the unit, there is glue inbetween the layers or any other suitable adhesive material.
Preferably, a cleaning unit being part of a cleaning means according to the invention should be fitted to rotate freely on a shaft when used for cleaning a barrel, so that it automatically follows the rifling helix of the barrel.
The invention is not limited to the shown embodiments, but several modifications of the invention are feasible within the scope of the attached claims.

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Claims

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. An improved means for treating the interior surface of a rifled firearm hard chrome plated barrel, said means comprising:
a treatment unit adapted for movement in a longitudinal direction of said barrel, said treatment unit including a plurality of flexible strips each having an outer surface area and abrasive material extending over said area, said strips being properly dimensioned for penetrating into the rifling grooves of said barrel, and said strips being arranged in the form of a whisk and being diametrically sized with respect to the barrel to be treated for said penetration into the rifling grooves.

2. The means according to claim 1, wherein the width of said strips correspond to the width of the bottom of the rifling grooves.

3. The means according to claim 1, in which said treatment unit includes a body portion, and said abrasive strips are attached to said body portion only at one end of said treatment unit.

4. The means according to claim 1, in which said treatment unit includes a body portion, and said abrasive strips are attached to said body portion of said treatment unit at both ends thereof.

5. The means according to claim 1, in which said abrasive strip whisk and its body portion has the form of a wound abrasive band, which is partly cut crosswise into small strips, and wound in its longitudinal direction, and the uncut portion of said band forms a cylinder and said cut portion forms at least one strip whisk.

6. The means according to claim 5, in which said cylinder includes at least two turns of said band.

7. The means according to claim 1, in which said abrasive strip whisk is dimensioned for fitting onto a conventional barrel treatment brush and including means urging said abrasive strips into cleaning engagement with said rifling grooves.

8. The means according to claim 7, including a barrel treatment brush, a shaft attached thereto and an abrasive strip whisk fitted on said brush, and said abrasive strip whisk being fitted to rotate freely on said shaft.

9. An improved means for treating the interior surface of a rifled firearm barrel, said means comprising:
a treatment unit movable in a longitudinal direction of said barrel, said treatment unit including a plurality of flexible strips each having an outer surface area and abrasive material extending over said area, said strips being arranged in the form of an elastic whisk and being diametrically oversized with respect to the barrel to be treated, and said strips being properly dimensioned for penetrating into the rifling grooves of said barrel.

10. The means according to claim 9, including a barrel treatment brush, and a shaft having a screw end freely rotatably attached to said brush, said abrasive strip whisk being held by said brush thereby permitting said treatment unit to rotate freely on said shaft during treatment of the interior surface of said rifled firearm barrel.

11. The means according to claim 9, in which the coarseness of said abrasive strips is about 200 to 400 mesh.

12. The means according to claim 9, wherein the width of said strips correspond approximately to the width of the bottom of the rifling grooves of said barrel for the penetrating into the rifling grooves of said barrel, and including means urging said strips into cleaning engagement with said rifling grooves such that during treatment, the width of said strips correspond approximately to the width of the bottom of the rifling grooves.