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Publication numberUS2985979 A
Publication typeGrant
Publication date30 May 1961
Filing date29 Apr 1960
Priority date29 Apr 1960
Publication numberUS 2985979 A, US 2985979A, US-A-2985979, US2985979 A, US2985979A
InventorsBrookshier Robert H, Doyle Jerry M, Montgomery Robert L
Original AssigneeBrookshier Robert H, Doyle Jerry M, Montgomery Robert L
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Moisture absorbing plug for a firearm chamber
US 2985979 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

May 30, 1961 .1. M* DoYLE ETAL 2,985,979


2,985,979 Patented May Sil, 1961 MOISTURE ABSRBING PLUG FOR A FIREARM CHAMBER Jerry M. Doyle, 2316 W. 22nd St., Sioux Falls, S. Dak.; Robert H. Brookshier, 4940 N. Olive, Kansas City, Mo.; and Robert L. Montgomery, Kansas City, Mo. (2914 W. 93rd St., Leawood, Kans.)

Filed Apr. 29, 1960, Ser. No. 25,726

9 Claims. (Cl. 42-1) This invention relates to a moisture absorbing plug or shell.

While being capable of use in various devices, the improved plug according to the instant invention, is particularly adapted for use in the bores of firearms, such as Shotguns and rifles, for preventing the prevalent accumulation of rust on the surface of the bores thereof.

The present practice to avoid the accumulation of rust on the walls of the bores of firearms is to apply a coating of oil or grease to the surfaces thereof which not only is time consuming but is not wholly effective.

It is accordingly a primary object of the present invention to provide a rust prevention plug which is not only highly effective in preventing the accumulation of rust, but which is capable of being applied and removed in a minimum period of time with the expenditure of a minimum of effort.

A further object of the invention is to provide a rust preventing plug which is relatively simple in construction, highly effective in use, and which is capable of being manufactured at relatively low cost.

A still further object of the invention is to provide a rust preventing plug of the same external contour as the live shells and cartridges whereby same is capable of being disposed within firearms as substitutes for corresponding shells and cartridges.

Other objects and advantages of the invention will become apparent in the course of the following detailed description, taken in connection with the accompanying drawing, wherein- Fig. 1 is an axial longitudinal sectional view of a first embodiment of the invention and wherein the plug is in the form of a standard shotgun shell.

Fig. 2 is a transverse sectional view, on an enlarged scale, as observed in the plane of line 2-2 on Fig. l.

Fig. 3 is a perspective view of a perforated tube disposed axially of the shell of Figs. 1 and 2, and being on the same scale as Fig. 2.

Fig. 4 is an axial longitudinal sectional View corresponding to Fig. 1, but which is in the form of a standard cartridge for use in rifles.

Fig. 5 is a `fragmental View partially in section and partially in elevation and disclosing the barrel of a rifle with the plug of Fig. 4 operatively disposed therein.

Referring now in detail to the drawing, and first to Figs. l, 2 and 3 thereof, the shotgun type of plug cornprises a cylindrical shell which is preferably of plastic material as indicated, and Whose external surface cor responds to the usual shotgun shell except that same is longitudinally corrugated as is indicated at 11.

A tube 12 is disposed within the shell 10 co-axially thereof and which at one end thereof is provided with a disc 13 through which the bore 14 of the tube 12 extends, as is shown in Fig. l, and at its opposite end, the tube 12 is fiared outwardly, as is indicated at 15.

As shown in Fig. 1, the flared end portion 15 is disposed within a corresponding opening in the end wall 16 of the shell 10 and the disc 13 is disposed within the open end of the shell.

The tube 12 is provided with a multiplicity of aper tures 17.

Disposed within the shell 10 in surrounding relation to the tube 12 and confined by the disc 13 and the end wall 16 is a mass of moisture absorbing silica gell 18.

While the mass of silica gell 1S is confined within the shell 10, sa-me is in atmospheric communication with the gun barrel B (indicated by dot-and-dash lines in Fig. 2) through the apertures 17, bore 14, as well as the openings 19 and 20 between the disc 13 and the gun barrel B, whereby moisture within the gun barrel is readily absorbed `by the mass of silica ge 18.

The modification according to Fig. 4 embodies the same general features of Figs. 1 to 3, but is in the form of a cartridge for use in rifles R, indicated in Fig. 5.

The structure of Fig. 4 embodies an outer shell 21 of plastic material and which is corrugated longitudinally as shown, and which shell is of plastic material.

An apertured tube 22 of plastic material is disposed within the shell 21 co-axially thereof and which tube is provided with a disc 23 at one end thereof and an opposite outwardly flared end portion 24.

The cartridge type form of Fig. 4 further embodies a simulated bullet 25 of plastic material and whose free end portion is provided with apertures 26.

In use of either form of moisture absorbing plug above described, same is disposed within the firing chamber C of a shotgun or rifle as a replacement for the usual shotgun shell or rifle cartridge, whereupon the barrel of either firearm is preferably closed at its free end as by means of a plug P, shown in Fig. 5.

As air is drawn into or expelled from the bore in either firearm, it necessarily passes through the body of desiccant silica gel 18 and all moisture contained therein is removed in a Well known manner.

The improved plug of either form disclosed may well have other applications such as to protect fishing tackle confined within a box or other articles subject to rust and confined within a receptacle.

It is to be particularly observed that the formation of either plug of plastic material avoids rusting or corrosion thereof.

Having set forth the invention in accordance with certain specific structural embodiments thereof, what is claimed and desired to be secured by U.S. Letters Patent 1. A moisture absorbing plug for disposition within the firing chamber of a firearm having a bore communicating therewith, comprising a shell including a cylindrical wall and an end wall, a tube disposed within said shell co-axially thereof and having one end thereof opening through said end wall, a disc surrounding the opposite end of said tube and substantially closing the opposite end of said shell, the Wall of said tube being provided with a series of apertures, and a body of moisture absorbing material disposed within said shell in surrounding relation to said tube.

2. The structure according to claim l, wherein said shell and said tube are of plastic material, and said shell being longitudinally corrugated.

3. The structure according to claim 1, wherein said first end of said tube is flared radially of the tube thereby providing an opening of greater radius than that of the remainder of the tube.

4. A moisture absorbing plug according to claim l, wherein said shell is of an external form conforming to the firing chamber of the said firearm.

5. A moisture absorbing plug for disposition within the firing chamber of a shotgun, comprising a shell of a form corresponding to that of a standard shotgun shell and comprising a cylindrical wall closed at one end by an end Wall, an apertured tube extending through said shell and having one end thereof opening through said end wall,

' a disc surrounding the opposite end of 'said tube and closing the opposite end of said shell, Vand a body of moisture absorbingrmaterial disposed Within said shell in 'surrounding relation to said tube.

6. The structure according to claim 5, wherein 'said cylindrical wall is longitudinally corrugated.

7. A moisture absorbing plug for disposition within the firing chamber of a ride, comprising a shell of a form corresponding to that of a standard rifle cartridge, and including a cylindrical wall closed at one end thereof by an end wall, the opposite end of said cylindrical wall being of reduced diameter, a wall in the for'm of a bullet having an open base end disposed within said Vreduced end of said cylindrical wall, a perforated Vtube disposed within said cylindrical wall centrally thereof and having one end thereof opening through said end wall, a disc sur- References Cited in the file of this patent UNITED STATES PATENTS 2,465,163 Lockwood Mar. 22, 1949 2,594,778 Heard Apr. 29, 1952 FOREIGN PATENTS Y 596,261 Great Britain Dec. 31, 1947

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2465163 *23 Sep 194422 Mar 1949Niles Bement Pond CoCorrosion prevention
US2594778 *9 Apr 194829 Apr 1952Hoard Roy CRust-preventing plug for bores of firearms
GB596261A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3678609 *25 Jun 197025 Jul 1972Fazio JosephSafety plug for firearms
US3710490 *20 Jul 197016 Jan 1973Cornett ESafety device for firearms
US3849923 *12 Nov 197326 Nov 1974E HawkinsDesiccating cartridge for firearm barrels
US4054002 *2 Jan 197618 Oct 1977Latona Jr Carmen JDesiccating device for firearm
US4084340 *30 Aug 197618 Apr 1978Gilbert Galde ScudderGun bore rust inhibiting method and apparatus
US4100693 *1 Feb 197718 Jul 1978Theo CechStriker cartridge
US4244295 *10 Jan 197913 Jan 1981Gte Products CorporationRadiant energy activated pyrotechnic cap having desiccant therein
US4263850 *10 Jan 197928 Apr 1981Gte Products CorporationPyrotechnic cap with moisture indicator
US4776123 *13 Oct 198711 Oct 1988Ascroft Ralph WSafety plug for firing chambers of guns
US4965952 *6 Jul 198930 Oct 1990Miller Gary LSafety plug for the firing chamber of a weapon
US5097613 *26 Oct 199024 Mar 1992Miller Gary LSafety plug for the firing chamber of a weapon
US5291832 *17 Jul 19928 Mar 1994Plummer Magalene MDummy round
US5628136 *1 Apr 199613 May 1997Wickser, Jr.; Robert L.Firearm cleaning device
US660431324 May 200212 Aug 2003Kenneth I. KressGun locking device and method for disabling a firearm
US6708438 *6 Jan 199723 Mar 2004Jeffrey SorensenCorrosion inhibitor for firearms
US878458530 Jun 200622 Jul 2014Tk Holdings Inc.Autoignition compositions
US904632729 Sep 20082 Jun 2015Tk Holdings Inc.Gas generator
US907351223 Jul 20137 Jul 2015Tk Holdings Inc.Gas generating system with gas generant cushion
US95560787 Apr 200931 Jan 2017Tk Holdings Inc.Gas generator
US20060220362 *30 Mar 20065 Oct 2006Hordos Deborah LGas generator
US20070113940 *30 Jun 200624 May 2007Burns Sean PAutoignition compositions
US20090102171 *29 Sep 200823 Apr 2009Hordos Deborah LGas generator
USRE38247 *5 May 199916 Sep 2003Wickser Jr Robert LFirearm cleaning device
U.S. Classification42/96
International ClassificationF41A35/00, F41A17/00, F41A17/44
Cooperative ClassificationF41A35/00, F41A17/44
European ClassificationF41A17/44, F41A35/00