Patent Application
20180149442
This invention relates generally to firearms and, more particularly, to methods and devices for cleaning and lubricating the firearms.
As explained by Brendan Atkinson—a technical advisor to the Sporting Shooters' Association of Australia—in “How to clean a firearm”:
“Firearms work better, shoot straighter and last longer if they are properly maintained and treated with respect. A large part of this maintenance involves the proper cleaning and care of the working mechanisms and the all-important bore.”
When a firearm is discharged, particles of burnt powder and primer residue are left in the bore, along with copper or lead-fouling depending on what bullets are being used. The next shot causes the bullet to pass over the fouling and so on for subsequent shots. If the firearm is neglected and many shots fired, a sandwich build-up of fouling can occur in the bore, especially just in front of the chamber. This, in effect, reduces the size of the bore and can result in a rise in pressure—in extreme cases, copper-clad bullets can be swaged down by this fouling so they exit the bore slightly undersized, and this is why fouling causes accuracy to drop off as more shots are fired.
In an article by Priscilla Cash, “AR-15: ‘Ready When You Need It’ Tips, Tricks and Techniques”, Ms. Cash explained:
“Carbon buildup in the action of the AR-15 can cause jams. While some carbon can build up in your rifle's barrel and this should be cleaned occasionally, the action is where significant carbon buildup can accumulate and cause problems. The bolt carrier, the bolt, and the so-called “star chamber” . . . are the areas you most want to focus on clearing of carbon residue.”
Star chambers, also known as barrel extensions, are found in, for example, M16, M-14 and AR rifles, such as the AR-15. Star chambers are where rounds of ammunition, pushed by a bolt carrier, are centered and chambered.
A ring of canted locking lugs, together with a center opening “rimmed” by top lands of the lugs, form a star inlet to a chamber behind it. The star inlet is part of the star chamber.
Star chambers can be fouled with built-up burnt powder, primer residue and, depending on the type of cartridge, copper or lead. Due to the odd configurations of star chambers, star chambers have been difficult to clean.
Firearm maintenance involves keeping the gun and its working parts free of carbon, metal particles (lead, copper, brass), and any other contaminant or foreign substance that may cause the gun to malfunction or to wear out prematurely. Firearms should generally be cleaned after firing them, and a deep cleaning should be performed periodically.
After a thorough cleaning, the next step in maintaining a firearm is to properly lubricate it. Lubrication is as important, if not more so than cleaning. To keep the firearm from malfunctioning, proper lubrication is essential and proper oiling protects metal parts from corrosion as well.
Sometimes a chamber brush (screwed into a rod) and/or a slot patch (in a slot plot holder screwed into a rod) is used to remove most of the fouling before turning to cotton swabs, such as Q-Tips® swabs.
As good as some cotton swabs are for getting into small or tight places, like the outside folds of a person's ears, those cotton swabs can leave fibers behind on a firearm's metal edges.
Some companies are selling specialized star chamber cleaning tools, such as: Otis Technology Star Chamber Tool; C.J. Weapons Chamber Maid Swab Kits; Tapco® Intrafuse® Cleaning Stars; and Real Avid AR-15 Star Chamber Stars.
Otis Technology's Star Chamber Tool (available for 5.56 mm and 7.62 mm caliber) has a nose piece which centers the tool in the star chamber. A chamber brush or other scraper components can be attached to this tool for added cleaning.
C.J. Weapons Chamber Maid Swab Kits (available for 0.223 and .308 caliber) each include: star-Styrofoam swabs with a center hole, straight bronze bore brush, removable handle, a flexible steel braid, and rubber coated cleaning rod. To clean the star chamber: the removable handle is threaded onto one end of the rod and the bronze brush is threaded into an opposite end of the rod; the brush is pushed into the star chamber multiple times; then a swab is pushed down onto a tip of the brush and pushed into the star chamber.
Tapco® Intrafuse® Cleaning Stars (available for AR-style and M14 rifles) are stars with a center hole. Similarly, Real Avid AR-15 Star Chamber Stars contain wool shaped stars with a center hole. Both star-shaped products apparently are designed to be used after shooters use a star-chamber brush to loosen the carbon. Then these cleaning stars are mounted, by their center holes, onto the brush tip or a cleaning rod. Solvent is added to the stars before moving them multiple times in and out of the star chamber.
Accordingly, it is a primary object of the present invention to create a more effective and efficient tool to clean, lubricate, and remove debris from the star chamber of a firearm (e.g., an AR/M14 rifle or variants).
It is another general object to provide such a tool that is lightweight, easy to use, and yet provides superior results.
Applicant has disclosed a handheld tool, and a related method, for cleaning and lubricating star chambers in firearms. Such firearms include but are not limited to AR-15 and M-14 rifles and variants.
In a preferred embodiment, Applicant's handheld tool comprises: a paddle grip; a midsection shank, affixed to the grip, having an exposed section and an unseen end section (stem); and a substantially T-shaped foam swab (or mitt) permanently affixed to the unseen end portion of the shank. The unseen end portion forms a backbone for most of the swab's stem. Preferably only the swab's T stem is affixed to the shank; that allows more flexibility and movement of the swab's T arm or wings.
The locking lugs, forming the star inlet, resemble the teeth of some gears. Each lug includes a canted face (here, substantially straight) on each side, a top land and, between each pair of successive lugs, a bottom land. Successive lugs have oppositely canted faces (“opposing faces”) compared to the lug next to it.
Each wing of Applicant's T-shaped foam swab is shaped, along the wing's leading edge and side, to fit (by compression of the wing) between and against the opposing faces of two successive lugs and their bottom land.
A shooter can use each wing of Applicant's swab to clean, simultaneously (or contemporaneously) with the other wing, opposing faces between different pairs of successive locking lugs, and the bottom lands between each pair. The bottom lands being cleaned simultaneously are approximately 180° apart.
Applicant's swab is designed to easily pass through adjacent locking lugs of the barrel extension and re-expand into the chamber allowing 360° of access. The stem's free end, due to its shape, can be inserted into the barrel end for centering. Then the tool can be rotated around its longitudinal axis to clean the chamber and the barrel end.
The above and other objects and advantages of the present invention will become more readily apparent upon reading the following description and drawings in which:
Applicant has disclosed a handheld tool and a related method for cleaning and lubricating star chambers in firearms. Such firearms (not shown) include but are not limited to AR-15 and M-14 rifles and variants. Super Brush LLC markets this new product under “SWAB-ITS® Star Chamber Cleaning Foam Swabs”. “SWAB-ITS” is a registered trademark belonging to Super Brush LLC.
As used in this application, the term “opposing face” or “opposing faces” means the oppositely canted faces between successive locking lugs of the star inlet. Each locking lug of a star inlet (see
As shown in the accompanying
The anatomy of the letter “T” comprises a stem and one arm. See, e.g., http://www.happytypings.com/alphabet/. Applicant sometimes refers to the T arm 110 of swab 106 as wings 112a, 112b in this application. The T stem, of swab 106, is referenced as 114.
Applicant's SWAB-ITS® star chamber cleaner 100 is made from a preferred process (not shown). Two sheets (not shown) of zapped polyurethane foam are placed onto the melted ridges (e.g., 120a, 120b) to bond the sheets to the shank 104. Then the affixed sheets are cut. Next the cut sheets are sealed thermally to provide tight seams. Preferably only the swab's T stem 114 is affixed to the shank 104; that allows more flexibility and movement of the swab's T arm 110.
As shown in
UFP Technologies describes zapping, also known as thermal reticulation, at https://www.ufpt.com/resource-center/quenching-vs-zapping-reticulated-polyurethane/.
“Zapping is a process that involves placing a bun of foam in a very large vacuum pressure vessel known as a ‘zapper.’ The vessel is evacuated and filled with an explosive gas mixture. The gas is ignited and a controlled flame front passes through the foam, melting the window membranes and leaving the skeletal structure intact. Zapping works with both polyester and polyether polyurethanes. The benefit of the zapping process is a smooth, clean polished cell stand.”
In the preferred embodiment 100, the T-shaped mitt 106 (when designed for an AR-15/M-14 rifle) is approximately 1.90 inches long and approximately 0.5 inches thick; the T stem 114 is approximately 1.40 inches long and approximately 0.50 inches wide; and the T arm 110 is approximately 1.25 inches long. The mitt 106 tapers at its seams (see
Each wing 112a, 112b is substantially shaped, along its side and leading edge, like the space formed by opposing faces (e.g., 122, 124) and a bottom land (e.g., at 126)(see
Wing 112a is adapted in size and shape to fit (by compression) between and against opposing faces (e.g., 122, 124) and a bottom land (e.g., 126) of successive lugs (e.g., 128, 130). Wing 112b is adapted in size and shape to fit (by compression) simultaneously or near the same time (i.e., contemporaneously) between and against two other opposing faces (e.g., 132, 134) and a different bottom land (e.g., 136) between two other successive lugs (e.g., 138, 140). The bottom lands 126, 136 are approximately 180° apart; so too are the wing tips.
Due to the mitt's dimensions and materials, a shooter (not shown) easily can clean and lubricate: the entire star chamber 142, including the top lands (e.g., 143) and bottom lands (e.g., at 126, 136) and opposing faces (e.g., at 122, 124 and 132, 134) forming the star inlet 144, by, e.g., using T wings 112a, 112b.
There are multiple was to clean a star inlet with Applicant's SWAB-ITS® star chamber cleaner 100. Typically the wings 112a, 112b are inserted respectively, between and against opposing faces (e.g., 122, 124 and 132, 134) and bottom lands (e.g., 126, 136), then retracted. (The compressed wings 112a, 112b expand upon removal.) This “in and out” process (insertion and retraction) can be repeated, for the same opposing faces and bottom land, if desired. Then the tool is rotated, around its longitudinal axis. The wings 112a, 112b are inserted into the next pairs of opposing lug faces and bottom lands, substantially 180° apart, and retracted from the star inlet 144. This process continues until all of the locking lug faces and associated bottom lands have been cleaned.
Sometimes users rotate the wings 112a, 112b in a continuous motion to clean all the opposing faces and bottom lands in the star inlet 144. But that is not the most thorough method to clean those areas with Applicant's swab cleaner 100.
Applicant's SWAB-ITS® star chamber cleaner 100 also is designed to easily pass, by compression of the wings, through the star inlet 144 (e.g., through adjacent locking lugs) and then re-expand into the rest of star chamber 142 (i.e., a chamber 146 behind the star inlet 144) allowing 360° of access. A free end 148 T stem 114 can be inserted into the barrel end (not shown) for centering. Then Applicant's SWAB-ITS® star chamber cleaner 100 can be rotated around its longitudinal axis 150 to clean the headspace in the chamber 146 (e.g., the inner diameter), including the back of the star inlet 144.
Applicant's T arm 110, of swab 106, can also be used to clean the remaining headspace (not shown) of the firearm. In firearms, headspace is the distance measured from the face of the bolt (not shown) to the part of another chamber that stops forward motion of a cartridge. The preferred swab 106 design calls for material (foam) which will compresses against walls of the barrel extension and thus making tight contact with the inner walls of the firearm.
Applicant's SWAB-ITS® star chamber cleaner 100 also can be used to lubricate the star chamber, its star inlet 144 and the remaining headspace of the firearm. Place a few drops of lubricating fluid onto the swab 106. Then repeat the steps above.
Applicant's SWAB-ITS® star chamber cleaner 100 (i.e., the paddle 102, shank 104 and swab 106) are flexible enough to easily enter through the ejection port on the upper receiver (not shown), without breaking down the firearm.
There is no paddle grip in the alternate embodiment 200. Instead, an externally threaded stub 260, attached to a modified shoulder 262 of the shank 204, enables the star chamber cleaner 200 to be threaded into a cleaning rod (not shown). Also the shank 204 is shortened to the shoulder 262 and the unseen, after bonding, end portion 208. That unseen portion 208 serves as the backbone for T stem 214. As shown in
Some other advantages of either embodiment 100, 200 of Applicant's invention include: precision cleaning; a tight fit; and maximum lubrication. No residue is left behind like the shedding from cotton swabs; and the standard patch is eliminated for cleaning.
Less cleaning solution is used with Applicant's SWAB-ITS® star chamber cleaner 100, 200. Instead of constantly pouring liquid over a traditional cleaning patch, Applicant's foam mitts 106, 206 can be soaked once in cleaning solution and if desired dipped for a second time. Applicant's swabs (mitts) 106, 206 provide even dispersion of cleaning and lubricating fluids in the barrel extension and chamber.
Applicant's star chamber cleaner 100, 200 also: cleans the firearm's headspace and barrel extension in one motion; provides a visual indicator of cleanliness; and has no metal components.
Applicant's embodiment 100 can be thought of as a method of cleaning a star inlet of a star chamber in a rifle, the method comprising:
Additional method steps comprise:
It should be understood by those skilled in the art that obvious structural modifications can be made without departing from the spirit of the invention. For example, the paddle grip 102 could be omitted, whereby the shank 104 could act instead as the handle. Or the mitt 106, 206 could be made of different material. Accordingly, reference should be made primarily to the accompanying Claims rather than the foregoing Specification to determine the scope of the invention.
This nonprovisional application is based upon U.S. Provisional Patent Application Ser. No. 62/427,452, filed Nov. 29, 2016. Applicant hereby incorporates the disclosure by reference of that prior application in its entirety.
| Number | Date | Country | |
|---|---|---|---|
| 62427452 | Nov 2016 | US |
