The invention relates to a gun cleaning tool, and particularly to a pull through gun cleaning tool.
Barrels of firearms are difficult to clean. Carbon and other residue from gunpowder and from firearm discharge reactions accumulate in firearm barrels, with deleterious effects on cleanliness, performance, and longevity of the firearm. Such residues require partial disassembly of a weapon to access and clean the barrel and associated firing chamber. A number of specialized swabbing, brushing and scraping tools have been introduced to clean firearm components, but have had substantial shortcomings.
According to one aspect, a helically wound pull through gun cleaning device includes a central member. At least one helical over-mold is overmolded over a portion of the central member and defines a helical path. The central member substantially conforms to the helical path. A tubular woven sheath overlays and conforms to the central member and is close woven over the central member and the at least one overmolded helical section.
In one embodiment, the helical section overmolded over a helical portion of the central member includes an outer surface with helical ridges and helical troughs disposed between the helical ridges.
In another embodiment, the helical section overmolded over a helical portion of the central member includes an elliptical cross section modified by the helical ridges and the helical troughs.
In yet another embodiment, the helical section overmolded over a helical portion of the central member includes a plastic over-mold.
In yet another embodiment, the plastic over-mold includes a thermo-plastic.
In yet another embodiment, the central member includes a coated cable.
In yet another embodiment, the coated cable includes a coating selected from the group consisting of nylon, vinyl, and plastic.
In yet another embodiment, the central member includes a steel wire.
In yet another embodiment, the tubular woven sheath includes a natural fiber.
In yet another embodiment, the tubular woven sheath includes a synthetic fiber.
In yet another embodiment, the tubular woven sheath includes a fiber selected from the group consisting of a heat resistant material, a meta-aramid, a NOMEX, a para-aramid, a KEVLAR™, a fiberglass, and a K-fiber.
In yet another embodiment, the tubular woven sheath includes a fiber selected from the group consisting of a nylon, a polystyrene, an acetal, an acrylic, a metallic thread, and a brass metallic thread.
In yet another embodiment, the tubular woven sheath includes a phosphorescent thread or a luminescent thread.
In yet another embodiment, the gun cleaning device further includes a fitting disposed at one or both ends of the gun cleaning device.
In yet another embodiment, the gun cleaning device further includes a T-handle mechanically coupled to an end of the central member by the fitting.
In yet another embodiment, the gun cleaning device further includes an accessory swab attachment mechanically coupled to an end of the central member by the fitting.
In yet another embodiment, the gun cleaning device further includes an accessory brush attachment mechanically coupled to an end of the central member by the fitting.
In yet another embodiment, the gun cleaning device further includes an accessory scraper attachment mechanically coupled to an end of the central member by the fitting.
In yet another embodiment, the gun cleaning device further includes disposed within the at least one helical over-mold an additional structural member including a different material than a material of the at least one helical over-mold to enhance a memory of the helical path.
According to another aspect, a method to manufacture a helically wound pull through gun cleaning device including: providing a central member; forcing the central member into a helical shape; overmolding the central member with a thermo plastic to form at least one helical section overmolded over a helical portion of the central member so that the central member maintains the helical shape over the helical portion after the thermo plastic cools or cures; and weaving a tubular woven sheath over the central member and the at least one overmolded helical section.
In one embodiment, the method further includes the step of affixing a fitting to at least one end of the central member.
According to another aspect, a helically wound pull through gun cleaning device includes a central member. At least one helical over-mold is overmolded over a portion of the central member and defines a helical path. The central member substantially conforms to the helical path. A tubular woven sheath is disposed over the at least one helical over-mold. Beyond the at least one helical over-mold the tubular woven sheath is disposed over the central member to form a pull cord. A total length of the pull cord is configured such that where the at least one helical over-mold is inserted into one end of a barrel, the pull cord extends past another end of the barrel. An uncompressed outside diameter of the at least one helical over-mold is larger than a bore of the barrel and when compressed by insertion into the bore of the at least one helical over-mold provides a radial force pressing the tubular woven sheath of the at least one helical over-mold against an inside surface or a rifling of the barrel.
The foregoing and other aspects, features, and advantages of the application will become more apparent from the following description and from the claims.
The features described herein can be better understood with reference to the drawings described below. The drawings are not necessarily to scale, emphasis instead generally being placed upon illustrating the principles of the invention. While the particular embodiments are described in relation to cleaning the interior of a gun barrel, individuals skilled in the art will recognize and understand that the disclosure and embodiments herein are equally applicable to cleaning pipes, conduits and tubing that is both straight and curved. In the drawings, like numerals are used to indicate like parts throughout the various views:
A system and tool for cleaning the interior of tubular members is described hereinbelow. In one embodiment, a cleaning device includes a central member supporting a region of overmolded elastomer around the cable core. The system can also include a tubular woven sheath surrounding at least a portion of the overmolded elastomer. The central member can include a fitting at one end and preferably at both ends for attachment to any of various auxiliary tools such as swabs, brushes, scrapers, handles, adapters and the like. The system and tools described herein are suitable for the cleaning of the barrels of firearms, such as the barrels of rifles, carbines, pistols.
Other types of pull through gun cleaning devices have been described, such as, for example, in co-pending U.S. patent application Ser. No. 13/785,966, APPARATUS AND METHOD FOR CLEANING THE BARREL OF A FIREARM filed Mar. 5, 2013, and co-pending U.S. patent application Ser. No. 14/076,713, APPARATUS AND METHOD FOR CLEANING THE BARREL OF A FIREARM filed Nov. 11, 2013, and co-pending U.S. Patent Application Ser. No. 62/111,391, MANDREL BASED HELICAL PULL THROUGH GUN CLEANING DEVICE, filed Feb. 3, 2015, 2015, and co-pending U.S. Patent Application Ser. No. 62/111,445, PULL THROUGH GUN CLEANING DEVICE WITH ONE OR MORE CYLINDRICAL DOUBLE CONED SHEATHED PRESSURE SECTIONS, filed Feb. 3, 2015, all applications also assigned to the present assignee, Otis Products, Inc. All of the above named applications are incorporated herein by reference in their entirety for all purposes.
A new helically wound pull through gun cleaning device is now described in more detail.
Typically, a plastic covered stranded steel wired forms the center core or central member of the tool helically wound pull through gun cleaning device 100. In the region of the helically wound section 101, a second plastic of the same type, or more typically another type of thermally formed plastic can be overmolded over the center core. It is the overmolded section which typically holds the center core in the helical shape in this region of the helically wound section 101. The helically wound section 101 and more typically the entire length of the pull through gun cleaning device 100 including the helically wound section 101 can be covered by a tubular woven sheath.
In many embodiments, an outer tubular woven sheath conforms tightly or snuggly to the helically wound section 101. In some embodiments the tubular woven sheath can be slid on to the central member and helically wound section 101. In some of those embodiments, the tubular woven sheath can be slid off of the central member and helically wound section 101 for cleaning. In some embodiments the tubular woven sheath conforms very tightly to the helically wound section 101 and is not intended to be removed. Some embodiments where the tubular woven sheath conforms very tightly can be washed as a complete tool including the central member and helically wound section 101.
The tubular woven sheath can be moistened, wetted, or dipped with any suitable gun barrel cleaning or lubricating material. Such gun barrel cleaning or lubricating materials are typically applied as a liquid to the tubular woven sheath, particularly where the outer surfaces of the tubular woven sheath over the helically wound section 101 will come in contact with the inner surface of the gun barrel.
There is typically compression of the helically wound section 101 to increase the force against the inner surface of the barrel and/or rifling of the inner surface of the barrel. Accordingly, there is typically, but not necessarily, a larger relaxed outside diameter of a helically wound section, and a somewhat smaller compressed outside diameter of a helically wound section when it is inserted in a gun barrel for pull through cleaning of the barrel. There can be near optimally sized helically wound sections for a particular weapon or barrel bore size, or there can be embodiments where a helically wound pull through gun cleaning device can fit more than one type of weapon and/or more than one gun barrel bore or inside diameter. However, more typically, a helically wound pull through gun cleaning device 100 can be manufactured for a specific diameter gun barrel bore.
The helical over-mold or a helical part that can be placed over a central core can be formed of any suitable material, such as, for example wood or plastic, such as, a thermoplastic. The helical over-mold can be formed from a thermoplastic by any suitable thermoplastic manufacturing technique, such as, for example, thermoplastic molding. The helical over-mold can be made from any suitable material, typically a material that offers some compressibility so that once compressed the combination of the compressed sheath and helical winding provides an outward pressure perpendicular to the center line of the bore so as to force the cleaning sheath against the interior surface of the bore (smooth or rifled) so that the sheath is forced against the interior surface as the sheathed helical section is pulled through the barrel. For example, the helical over-mold can be formed of a thermosetting rubber polymer, such as by injection molding onto the coating 502 of the central member 600 (
In most embodiments, the “memory” of the uncompressed helical over molding provides a substantially 360 degree cleaning around the interior bore of a barrel of a weapon. In other words, the helical section compresses to provide a radial force pressing the tubular woven sheath over the helical over mold against an inside surface or a rifling of the barrel. In most embodiments, the memory of the uncompressed helical radius is provided by the shape memory of the over mold, such as a thermoplastic over mold. However, it is also contemplated that the helical over mold could include more than one type of material, such as an additional structural member made from a different material. For example, it is contemplated that there could be disposed within a thermoplastic helical over mold an additional strand or member of another type of plastic or metal which further enhances the memory shape of the uncompressed helical section. For example, it is contemplated that an over molded thermoplastic helical section could include disposed within, a section of another type of stiffer or more rigid plastic rod or strip, or a section of a shape memory metal (SMA), such as for example a section of SMA wire to enhance the memorized helical shape.
The following prototype helically wound pull through gun cleaning device was manufactured. The exemplary tool was about 30″ long. The helically wound section was about 6″ long and about 1.5″ in diameter (uncompressed by the barrel of a weapon). The pull cord, or long straight section was about 0.15″ in diameter including the tubular woven sheath over the coated cable. The helical over-mold with roughly an elliptical cross section was about 0.38″×0.26″ (including ridges and troughs). The central member had a diameter of the cable coating of about 0.094″ and a diameter of the wire rope of about 0.065″. The wire rope was made from 5 bundles of 7 zinc plated wires, each wire having a diameter of about 0.007″.
While the exemplary embodiments described hereinabove are based on a coated wire cable, the central member can comprise any suitable material or elongate form, e.g., fiber rope or cord, rod, wire, or twisted or braided cable and can be rigid, semi-rigid or semi-flexible. The rigid or semi-rigid structure of a helically wound pull through gun cleaning device makes it an excellent gun barrel obstruction remover. In some embodiments, the central member can have sufficient rigidity to be easily threaded or passed through the tubular member. A wire cable as described hereinabove can also be formed of a metal such as galvanized steel, preferably formed to have a natural curl for ease of laterally coiling in storage and preferably having a protective plastic coating. The protective plastic coating reduces the risk of scratching gun components and the potential for fraying of the cable. With respect to the cleaning of tubular members other than gun barrels, a semi-rigid structure of the core can accommodate some slight or eventual curves in the interior of a pipe, conduit or tube. However, a semi-flexible core member is preferable for cleaning sections of pipe, conduit or tubes having substantially curved shapes and turns between straight segments of tubular members.
Where the sheath is comprised of heat resistant fibers or materials, cleaning of the sheath can also be performed by the application of sufficient heat to burn off the accumulated residue. For example, the tool 10 or the sheath 12 could be placed in an oven at a temperature below the melting or deformation temperature of the fibers such that any dirt or carbon residue detaches from the fibers of the sheath.
Referring now to
With reference to
In some embodiments, the sheath 12 is not connected to the fittings or central member 18, but held in place by the tight fit of the woven sheath 12. In other embodiments, the sheath can be removable from the tool for cleaning to remove build-up of removed residue. The sheath 12 can include elasticized threads to assist in the removal, cleaning and/or replacement of the sheath. Alternatively, cleaning can be accomplished by soaking the coiled tool in a suitable detergent solution and rinsed to remove the accumulated build-up of dislodged residue.
The respective thicknesses of the central core, protective layer, any overmolded protrusions, absorbent materials and the woven sheath can be varied to change the radial width of the tool to fit the gun barrels of differing calibers. Alternatively, the compressibility of any of the overmolded protrusions or the helical over-mold, absorbent material and/or the woven sheath can also be increased so that a single tool can appropriately clean a range of calibers of gun barrels.
In some embodiments, the natural fibers of the sheath and any absorbent material disposed beneath the sheath or at the trailing end of the central member can be used to absorb and remove spent cleaning fluids containing dislodged residue. However, in some embodiments, the overmolded thermoplastic region has been successfully deployed to clean a variety of relatively narrow tubular members without a sheath. A plurality of protrusions, including particularly, helical protrusions, or the helical over-mold, is effective at removing liquids and semi-solids such as grease and congealed oils, from narrow drains. An additional protrusions, or a plurality of protrusions, such as, for example, ridges of a helical over-mold can wipe excess accumulations of liquids and semi-solids in the manner of a squeegee from the interior of a pipe or drain. Even where a pipe or drain includes a catch or other curved portion, embodiments of the invention utilizing a semi-flexible central member were threaded through the drain and pulled through the tubular member. This embodiment removed excess accumulations of grease and spent oils in a small fraction of the time of other common methods.
It will be appreciated that variants of the above-disclosed and other features and functions, or alternatives thereof, can be combined into many other different systems or applications. Various presently unforeseen or unanticipated alternatives, modifications, variations, or improvements therein can be subsequently made by those skilled in the art which are also intended to be encompassed by the following claims.
This application claims priority to and the benefit of U.S. provisional patent application Ser. No. 62/111,315, HELICALLY WOUND PULL THROUGH GUN CLEANING DEVICE, filed Feb. 3, 2015, which application is incorporated herein by reference in its entirety.
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