Patent Application
20060236584
This invention relates to firearm cleaning, and, in particular, to a configurable firearm barrel cleaning device for reliably and efficaciously cleaning a wide variety of firearm barrels, including those of military issue firearms and platform mounted weapon systems, and a kit for containing the components of the cleaning device.
A wide range of materials (e.g., carbon, copper, plastic, dirt, snow, mud, soot) inevitably accumulate over time within the barrel of a firearm, and the presence of such materials can moderately to severely compromise the efficacy of a firearm absent proper periodic cleaning of its barrel. For example, the short term build-up of materials within a firearm barrel can undesirably delay the release time of a bullet or other form of ammunition fired from the firearm. Also, materials that remain within a firearm's barrel for a prolonged period of time can cause corrosion or other significant degradation of the firearm's components, thus potentially necessitating expensive repair or replacement of the firearm.
Although the design of firearm cleaning devices has varied over time, they tend to fall into one of two general design categories: rigid devices (as described, e.g., in U.S. Pat. No. 2,559,376 to Schnitger, U.S. Pat. No. 3,208,302 to Lewis et al., U.S. Pat. No. 4,144,609 to Dubs, U.S. Pat. No. 5,815,975 to Rambo et al., and U.S. Pat. No. 6,378,236 to Solberg et al.) and flexible devices (as described, e.g., in U.S. Pat. No. 4,399,627 to Malesky, U.S. Pat. No. 5,871,589 to Hedge, and U.S. Pat. No. 6,630,034 to Schnell). Despite differences in their design, firearm barrel cleaning devices are generally used in similar ways, namely by being inserted within the firearm to loosen or dislodge (e.g., by one or more of brushing, scraping and/or rinsing actions) unwanted materials from within the barrel. The dislodged materials are then removed from the barrel by the cleaning device itself, or through the use of one or more additional devices.
Unfortunately, most known firearm cleaning devices, whether rigid or flexible, have been plagued by one or more drawbacks, including difficulty of use and/or transport, lack of versatility (i.e., inability to clean a wide array of firearms), and inefficacy. The inefficacy problem in particular has become more pronounced as the size, shape, caliber and action of firearms has continued to change and evolve over time. Many traditional firearm barrel cleaning devices cannot satisfactorily clean the barrel of newer, more sophisticated firearms, especially military issue weapons such as the so-called 40 mm series. Consequently, the only current option for effectively and reliably cleaning such firearms may be disassembly and reassembly, which collectively can take several hours. That is an unacceptable time frame under any circumstances, but can be even more problematic, if not life-threatening, within the traditional contexts in which such weapons are used.
Therefore, a need exists for a firearm cleaning device that is easy to use and transport, and that can reliably and effectively clean a wide range of firearm barrels, including those of military issue firearms.
The present invention meets these and other needs by providing a configurable firearm barrel cleaning device and methods for using the device. The firearm cleaning device includes one or more cable segments and one or more rods to which a plurality of components and/or attachments can be connected individually or in combination in order to configure the device to perform a plurality of cleaning operations. The cable segment(s) and some or all of the components can be stored within a container, e.g., for packaging or sale as a kit.
A firearm barrel cleaning process of the present invention entails a plurality of cleaning steps in order to ensure that unwanted materials are reliably and thoroughly removed from the barrel. According to a currently preferred aspect of the present invention, the cleaning process has a minimum of three steps, wherein the first step applies solvent or other cleaning assistance substance and removes loose materials from within the barrel, the second step dislodges materials not removed during the first step, and the third step removes the dislodged materials.
To form the cleaning device, an arbor is attached to a flexible segment of cable. For the first cleaning step, a beveled cylindrical plug is placed over the stem of the arbor and a patch is placed atop the plug. A cleaning assistance substance is applied to the patch, and then the device is pulled through the firearm barrel in a breech-to-muzzle direction such that loose materials from within the barrel adhere to the patch and move away from the firing and shell discharge mechanisms within the firing chamber. For the second cleaning step, the patch and plug are replaced by one or more brush wheels, which dislodge materials from within the barrel as the device is pulled through the firearm barrel in a breech-to-muzzle direction. The third cleaning step uses the same equipment as the first step, except that no cleaning substance is applied to the patch and either a new patch is used or a previously unused surface of a previously used patch is utilized. During the third cleaning step, the materials dislodged during the second cleaning step adhere to and are thus removed by the patch.
Once the three cleaning steps have been performed, the level of cleaning that has occurred is assessed in order to determine whether any or all of the cleaning steps should be repeated. This assessment is made visually either via the aided or unaided eye. If it is determined that additional cleaning is required, then any or, as is currently preferred, all of the cleaning steps may be repeated one or more times.
The cleaning process also can entail other cleaning steps, which can be performed in addition to or in lieu of the earlier steps. For example, one or more additional cleaning steps can be performed as spot cleaning in lieu of or to postpone performing the earlier cleaning steps, or as supplemental cleaning prior to, during and/or following the earlier cleaning steps. To perform these other cleaning steps, one or more components or attachments (e.g., one or more brush, pick, scraper) are connected either to a cable segment or to a rod, which, in turn, can be connected to one or more additional rods for added length.
Some or all of the various components that are utilized to form the configurable cleaning device of the present invention can be stored, packaged and/or offered for sale as a kit. The kit components are generally contained within a portable, lightweight case, which can be easily carried by a firearm user.
Due to the configurability of the cleaning device of the present invention, it can reliably and effectively clean a wide variety of firearms, including military issue firearms (e.g., the 40 mm series). The term “firearm,” as used herein, refers to a weapon that is capable of firing a projectile therefrom. Examples of firearms for purposes of this invention include, but are not limited to, guns, handguns, shotguns, machine guns, rifles, assault rifles, revolvers, derringers, pistols, machine pistols, and small canons, wherein such weapons are considered firearms for purposes of this invention whether or not they are carried by a user or are mounted onto something (e.g., an aircraft, a tank, a foundation) for use. Firearms for purposes of this invention can have any caliber, including a caliber above or below 0.50 caliber, and can have any type of action, including, but not limited to single action, double action, pump action, bolt action, lever action, automatic or semi-automatic action.
Still other aspects, embodiments and advantages of the present invention are discussed in detail below. While the particular embodiment of this patent is directed to devices for the cleaning and maintenance of 40 mm series weapons, persons skilled in the art would appreciate that the invention is easily adapted to clean and maintain other size firearms by varying the dimensions of the respective components.
For a further understanding of these and objects of the invention, reference will be made to the following detailed description of the invention which is to be read in connection with the accompanying drawing, where:
The present invention provides a firearm cleaning device. The device includes one or more cable segments and one or more rods to which a plurality of components and/or attachments can be connected individually or in combination in order to configure the device to perform a plurality of cleaning operations on a wide range of firearm barrels, including those of military issue firearms. The cable segment(s), the rod(s) and some or all of the components can be stored within a container for packaging/sale as a kit.
A firearm barrel cleaning process of the present invention entails a plurality of cleaning steps in order to ensure that unwanted materials are reliably and thoroughly removed from the barrel. According to a currently preferred embodiment of the present invention, the cleaning process has a minimum of three steps, wherein the first step applies solvent or other cleaning assistance substance and removes loose materials from within the barrel, the second step dislodges materials not removed during the first step, and the third step removes the dislodged materials.
The generally cylindrical plug 400 has an opening 410 defined therein that is sized to enable the plug to fit over the stem 310 of the arbor 300 as shown in
Once the plug 400 is in place, the patch 500 is positioned over the arbor stem 310. As shown in
As shown in
To continue assembly of the cleaning device 100A, the arbor 300 is connected to the cable segment 200 by reversibly yet reliably attaching the end 210 of the cable segment to the end 340 of the arbor. In a currently preferred embodiment of the present invention, the end 340 of the arbor 300 has an opening into which the end 210 of the cable segment 200 is inserted to enable connection. As shown in
The centerpiece 120 preferably has a smooth transverse bore 140 (see
Once the cleaning device 100A is completely assembled, it is ready for insertion into a firearm. However, it is currently preferred to place a predetermined quantity of a solvent or other cleaning assistance substance onto the exposed surface 520 of the patch 500 prior to commencing the insertion process. The cleaning assistance substance can be contained within a tube or other container 1300 (see
Insertion of the device 100A commences by introducing the end 220 of the cable segment 200 into the chamber of the firearm (not shown). The cable segment 200 is advanced through the firearm in a breech-to-muzzle direction (i.e., through the chamber, shoulder, neck and barrel) until the end 220 emerges from the firing end of the barrel. According to a currently preferred embodiment of the present invention, the centerpiece 120 is attached to the end 220 of the cable segment prior to the insertion of the device 100A within the firearm, since that will allow the centerpiece to assist in unblocking any obstructions within the firearm barrel.
Once the second end 220 of the cable segment has emerged from the firearm, the handle 110 can be formed as described above. The handle 110 is used to pull the cleaning device 100A through the firearm barrel in a breech-to-muzzle direction to cause the patch 500 to clean the barrel. It is currently preferred to apply a predetermined torsional force the device 100A (e.g., by rotating or twisting the handle 110) as the device is being pulled through the barrel, since doing so will cause added cleaning (i.e., will cause the patch 500 to pick up more loose materials).
Once the device 100A is completely withdrawn from the barrel, the assembly process is reversed such that the device can be subsequently reconfigured to perform the second cleaning step of the cleaning process in which the cleaning device dislodges materials from within the firearm barrel.
In an alternative embodiment of the invention, any independent rotation of the brush wheel 700 and the arbor 300 can be limited or prevented by the presence of a keying feature (not shown) on the inner surface of the grommet 710 and the outer surface stem of the of the arbor 300. For example, a protrusion on the inner surface of the grommet may be dimensioned to fit within a longitudinal groove on the outer surface of the stem of the arbor.
As indicated in
Once the brush wheel or wheels 700 have been put in place, the arbor 300 is attached to the cable segment 200 as described above with respect to the first cleaning device 100A. If desired, and as shown in
As with the device 100A of
Once the device 100B is removed from the firearm barrel, the assembly process is reversed such that the device can be reconfigured for the third cleaning step in which the cleaning device removes materials dislodged during the second cleaning step. To perform the third cleaning step, and according to a currently preferred embodiment of the present invention, the cleaning device is configured and utilized identically to the device 100A depicted in
After completion of the third cleaning step, it is currently preferred to assess the level of cleaning that has occurred in order to determine whether any or all of cleaning steps one, two and/or three should be repeated. This assessment can be made visually in one of two ways—through use of an aiding instrument (e.g., a bore reflector 800 as shown in
The cleaning process also can entail other cleaning steps, which can be performed in addition to or in lieu of those described above. For example, one or more additional cleaning steps can be performed as spot cleaning in lieu of or to postpone performing the cleaning steps described above, or as supplemental cleaning prior to, during and/or following the previously described cleaning steps.
To perform these other cleaning steps, one or more components or attachments are connected (e.g., via a threaded connection) either to an end 210, 220 of the cable segment 200 or, as is currently preferred, to a first end 610 of a female rod 600B (see
In contrast to the devices 100A, 100B utilized during the three above-described cleaning steps, the cleaning devices 100C, 100D, . . . 100x are generally utilized by being inserted into the firing end of a firearm. However, the devices 100C, 100D, . . . 100x can be utilized identically to devices 100A, 100B as well, in which case it is currently preferred to form the device by connecting an attachment to the cable segment 200 rather than the one or more rods 600.
The specific choice of which attachment(s) to utilize in order to form the devices 100C, 100D, . . . 100x will vary depending on several factors, including, but not limited to, the type of firearm being cleaned, the type of material sought to be cleaned, and the level of cleaning sought to be achieved. By way of non-limiting example, the side brush attachment 1100 can be utilized for stripping away materials that have built up near the firing end of the barrel, as can the scraper attachment 1100, which is particularly effective for eliminating carbon, copper and plastic materials.
According to a currently preferred embodiment of the present invention, the container in which the kit is housed should be portable and lightweight, yet sturdy, and substantially waterproof. A suitable container is commercially available from Otis Products Inc. of Lyons Falls, N.Y.
Although the components and attachments in
For example, the length of the cable segment 200 can vary according to a number of factors, including the type of firearm being cleaned. In a currently preferred embodiment of the present invention, a kit will include at least two cable segments 200 of different lengths, wherein the length of a first segment is about 30.0 inches and the length of a second segment is about 12.0 inches.
The cable segment(s) 200 should be flexible to allow for easy maneuvering through the firearm barrel, yet durable to ensure that the cable does not break or become frayed during the cleaning process. The material from which the cable segment(s) 200 can be made also can vary; however, to allow for both flexibility and durability, and according to a currently preferred embodiment of the present invention, each cable segment 200 is comprised of a metal-based core surrounded by a plastic-based outer layer. By way of non-limiting example, the cable segment(s) 200 can be made of the same materials from which the flexible shaft of the gun barrel cleaner described in U.S. Pat. No. 4,716,673 to Williams et al. are constructed.
The arbor 300 can be made of various materials, including but not limited to metallic-based materials and alloys thereof. According to a currently preferred embodiment of the present invention, the arbor is made of brass (e.g., alloy 360 brass). The diameter of the cylindrical end 330 of the arbor 300 generally is equal to about 150% of the diameter of the stem, and the length of the cylindrical end is generally about 20% of the overall length of the arbor 300. In a currently preferred embodiment of the present invention, the diameter of the cylindrical end 330 of the arbor 300 is about 0.75 inch and the diameter of the stem 310 is about 0.49 inch, whereas the length of the cylindrical end is about 0.25 inch and the overall length of the arbor is about 1.25 inch.
The width of the open end 340 portion of the stem 310 of the arbor 300 is generally less than about 50% of the diameter of the stem, wherein an open end width of about 0.21 inch is currently preferred. As illustrated in
The grommet 710 and bristles 720 of each brush wheel 700 are generally made of different materials. A currently preferred material for the grommet is a metallic-based material (e.g., stainless steel, brass), and currently preferred materials for the brush body are filament-based materials, including, but not limited to, nylon (e.g., 0.010 nylon) and cubic boron nitride (0.016 CBN).
Although the brush wheel 700 is depicted and described herein as being circular, it can have other shapes as well (e.g., square, elliptical). The combined diameter of the grommet 710 and the opening 730 of the grommet generally accounts for about 50% of the overall diameter of the brush wheel 700 (including the bristles 720), wherein according to a currently preferred embodiment of the present invention, the overall diameter of the brush wheel (including the bristles) is about 1.75 inch and the combined grommet and opening diameter is about 0.91. The diameter of the opening 730 of each brush wheel 700 is approximately equal to, but slightly greater than the diameter of the arbor stem 310 so as to allow the brush wheel opening to fit over the stem. According to a currently preferred embodiment of the present invention, the diameter of the brush wheel opening 730 is about 0.50 inch.
The thicknesses of the grommet 710 and the bristle portion 720 of the brush wheel 700 are generally similar; however, according to a currently preferred embodiment of the present invention, the grommet is about 10% to 15% thicker than the bristle portion 720 of the brush wheel, wherein the thickness of the grommet is about 0.35 inch and the thickness of the bristle portion is about 0.31 inch.
The plug 400 can be made of a range of materials. According to a currently preferred embodiment of the present invention the plug is made of a resilient, durable, non-metallic material to minimize the possibility of the patch 500 becoming torn against the plug during the cleaning process. By way of non-limiting example, the plug 400 can be made from a rubber or plastic-based material.
The overall diameter of plug 400 is generally similar to, yet less than the overall diameter of the brush wheel 300, and the diameter of the plug opening 410 should be approximately equal to, but slightly greater than the diameter of the arbor stem 310 so as to allow the brush wheel opening to fit over the stem. According to a currently preferred embodiment of the present invention, the diameter of the plug 400 is about 1.67 inch and the diameter of the plug opening 410 is about 0.50 inch.
The overall thickness of the plug 400 is generally greater than the overall thickness of the brush wheel 700, and, as is currently preferred, is about 0.50 inch. The thickness of the cylindrical portion 420 of the plug 400 is generally equal to more than about 50% of the overall thickness of the plug, wherein a currently preferred thickness of the cylindrical portion is about 0.286 inch. The angle of bevel of the beveled or frusto-conical portion 430 can vary and even be a slightly rounded taper; however, according to a currently preferred embodiment of the present invention, the angle of bevel is about 45°.
Although the patch 500 is depicted and described herein as being round, it can have other shapes as well, including but not limited to elliptical and square. The patch 500 can be made of a range of materials, wherein the specific material should facilitate the ability of the patch to remove the materials that tend to accumulate within the barrel of the firearm. According to a currently preferred embodiment of the present invention, the patch is made of a fiber-based material, wherein a cotton-fiber based material is currently most preferred. The diameter of the patch 500 should be greater than the overall diameter of the plug 400, preferably by at least about 75%. According to a currently preferred embodiment of the present invention, the diameter of the patch 500 is about 3.0 inches. It should be noted, however, that a standard 2 inch military issue patch 500 can be used in accordance with the present invention as well. In such an embodiment, it would be necessary to create a hole within the patch 500.
As packaged within the kit, the patch(es) 500 can have no openings or one or more prefabricated openings. According to a currently preferred embodiment of the present invention, each of the patch(es) 500 within the kit should have at least one opening 510 defined therein to allow for placement of the patch over the stem 310 of the arbor 300. As is also currently preferred, the patch(es) should have a plurality of differently located slits (not shown) into which a slotted cleaning tip (as described, e.g., in U.S. Pat. No. 4,716,673 to Williams et al.) can be inserted in furtherance of cleaning one or more different types of firearms. Even if not utilized as such, the slits will not cause the patch 500 to tear, nor will they inhibit the cleaning efficacy of the patch.
The bore reflector 800 has a substantially straight main body 810 and a curved portion 820 so as to form a shape similar to a “candy cane.” The bore reflector 800 should be formed of a material that allows one to utilize the reflector as an aid during visual examination of the firearm barrel. Suitable such materials include but are not limited to polymer-based materials such as resin materials. According to a currently preferred embodiment of the present invention the bore reflector is made of a polycarbonate resin, such as fiber optic LEXAN®, which is commercially available from GE Plastics of Pittsfield, Mass. USA.
The overall length of the bore reflector 800 is generally at least twice at much as its overall width, wherein according to a currently preferred embodiment of the present invention the bore length and width are about 2.15 inches and about 0.96 inch respectively. The width of the main body 810 of the bore reflector 800 is generally less than one-third of the overall width of the bore reflector 800, with a main body width of about 0.31 being currently preferred. The length of the main body 810 is generally at least about 75% of the overall length of the bore reflector 800, with a main body length of about 1.68 inch being currently preferred.
The scraper attachment 900 and the pick attachment 1000 are generally made of the same material, with a metal-based material being currently preferred. Among the suitable materials from which the scraper attachment 900 and the pick attachment 1000 can be constructed are brass (e.g., 360½ HD brass). It is also currently preferred for both the scraper 900 attachment and the pick attachment 100 to have an outer coating layer, wherein a metal-based coating is preferred in both instances. Among the suitable coating materials are copper (e.g., black copper).
The scraper attachment 900 has a main body 910 and a threaded stem 920, wherein the length of the main body is generally at least 75% of the overall length of the scraper attachment, with the length of the threaded stem comprising the remaining length. According to a currently preferred embodiment of the present invention, the overall length of the scraper attachment 900 is about 1.874 inch and the length of the main body 910 is about 1.61 inch.
The pick attachment 1000 has a main body 1010, a threaded stem 1020 and an elongate tip 1030, wherein the main body can include a textured (e.g., knurled) portion 1040. The length of both the main body 1010 is generally greater than that of the elongate tip and generally comprises at least about 50% of the overall length of the pick attachment 1000. The length of the elongate tip 1030, in turn, is generally at least about 50% greater than the length of the threaded stem 1020. According to a currently preferred embodiment of the present invention, the overall length of the pick attachment 1000 is about 1.9175 inch, wherein the lengths of the main body 1010, the threaded stem 1020 and the elongate tip 1030 are about 0.967 inch, 0.6875 inch and about 0.264 inch respectively.
The side brush component 1100 includes a threaded stem 1110 and a main body 1120, from which a plurality of bristles 1130 extend lengthwise in a direction substantially perpendicular to the main body. The side brush bristles 1130 are made from a filament-based material different that the material from which the brush wheel bristles 730 are made. The main body 1120 and the stem 1110 are generally made from different material, wherein according to a currently preferred embodiment of the present invention the main body is made of a plastic material, and the threaded stem is made of a metal-based material.
The length of both the main body 1120 generally comprises at least about 80% of the overall length of the side brush component 1100, with the length of the threaded stem 1110 comprising the remaining length. According to a currently preferred embodiment of the present invention, the overall length of the side brush attachment 1100 is about 2.69 inches and the length of the main body 1210 is about 2.35 inches.
The overall width of the side brush attachment 1100 consists of the width of the main body 1120 plus the protruding length of the bristles 1130. The protruding length of the bristles 1130 generally comprises at least about 50% of the overall width of the side brush attachment 1100. According to a currently preferred embodiment of the present invention, the overall width of the side brush attachment 1100 is about 0.61 inch and the protruding length of the bristles 1130 is about 0.34 inch.
The end brush attachment 1200 includes a threaded stem 1210 and a main body 1220, from which a plurality of bristles 1230 extend lengthwise in a direction substantially parallel to the main body. The end brush bristles 1230 are made from a filament-based material different that the material from which either the brush wheel bristles 730 or the side brush bristles 1130 are made. The main body 1220 and the stem 1210 of the end brush attachment 1200 are generally made from the same material, which, according to a currently preferred embodiment of the present invention, is a metal-based material (e.g., 360½ HD brass). As is also currently preferred, the main body 1220 of the end brush component 1200 is coated with a metal-based material. Among the suitable coating materials is copper (e.g., black copper).
The length of the main body 1220 and the length of the bristles 1230 are similar, and are generally slightly less than about twice as much as the length of the threaded stem 1210. According to a currently preferred embodiment of the present invention, the overall length of the end brush attachment 1200 is about 1.25 inches, wherein the lengths of the main body 1220, the threaded stem 1210 and the bristles 1230 are about 0.487 inch, about 0.263 inch and about 0.5 inch respectively.
The male rod 600A and the female rod 600B are generally made of the same materials, wherein a currently preferred material is a metal-based material. Suitable metal-based materials include, but are not limited to brass (e.g., 360½ HD brass). The diameters of the male rod 600A and the female rod 600B are substantially equal, and the length of the male rod is slightly greater than that of the female rod. According to a currently preferred embodiment of the present invention, the diameter of the male and female rods 600A, 600B are about 0.203 inch and their lengths are about 3.499 inches and about 3.25 inches respectively.
The centerpiece 120 is generally made of a metal-based material, wherein a currently preferred metal-based material is brass (e.g., 360½ HD brass). As is also currently preferred, the centerpiece (with the exception of ends 130, 150) is coated with a metal-based material. Among the suitable coating materials is copper (e.g., black copper). The diameter of the bore 140 should be similar to, but slightly greater than the diameters of the male and female rods 600A, 600B and less than the diameter of the end 130. Also, the diameter of the bore 140 is generally less than about 25% of the overall length of the centerpiece 120. According to a currently preferred embodiment of the present invention, the diameters of the bore 140 and the end 130 are about 0.205 inch and about 0.313 inch respectively, and the overall length of the centerpiece 120 is about 0.93 inch.
The cleaning devices 100A, 100B, 100C of the present invention can be used to clean all firearms, however, they are particularly suited for cleaning certain military issue weapons, which heretofore required complicated and time consuming disassembly and reassembly to ensure adequate cleaning. Among the military issue weapons that can be cleaned by one or more of the devices 100A, 100B, 100C, 100D, . . . 100x of the present invention are the so-called 40 mm series, including, but not limited to the HK GMG 40 mm, the M203, and the MK19 40 mm grenade launcher.
Although the present invention has been described herein with reference to details of currently preferred embodiments, it is not intended that such details be regarded as limiting the scope of the invention, except as and to the extent that they are included in the following claims—that is, the foregoing description of the present invention is merely illustrative, and it should be understood that variations and modifications can be effected without departing from the scope or spirit of the invention as set forth in the following claims. Moreover, any document(s) mentioned herein are incorporated by reference in their entirety, as are any other documents that are referenced within the document(s) mentioned herein.
