CLEANING MEANS

OUTIL DE NETTOYAGE

English 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.

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.

Description

~7~0~
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
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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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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
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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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