US2953972A

US2953972A - Muzzle equalizer and blast minimizer for gun

Info

Publication number: US2953972A
Application number: US758218A
Authority: US
Inventors: Hans C Sorensen
Original assignee: Individual
Current assignee: Individual
Priority date: 1958-09-02
Filing date: 1958-09-02
Publication date: 1960-09-27
Anticipated expiration: 1977-09-27

Description

Sept. 27, 1960 H. c. SORENSEN MUZZLE EQUALIZER AND BLAST MINIMIZER FOR GUN Filed Sept. 2, 1958- rm MB 2,953,972 PEtentedSeptZ'Z, 1960 MUZZLE EQUALIZER AND.,BLA STMINIMIZE R EORGUN -Hans.C..-Sorensen,3395tSW.:108th Avei,

Beaverton,-: Greg. 7

My present .invention is close1y.relatedjto.'the gun muzzle equalizer described and claimedin my pen'ding United States .application bearing SerialNo.160l;993

filedAugust 3, 1956, on whichfurfther procce ing rare now abandoned. "The essential differences .between'fthe device disclosed in the pending. applicationand'thepresent .invention herein set forth is in'the provision of means whereby the expandinggases aredefiectedjandlor otherwise.channeled not only .to hold "the gun barrell'from jumping upwardly but also tQminin'nZethe fiectsoflthe ;mosphere, normally expand in. the form CiflajCOlJm 'In the process of their expansion; anexcessiverecoilshock results causing. discomfort to the person' firing' the gun,

"forcing the gun barrel to'jump"upwardly,*thus:preventing the keeping of the gun on'thetarget, arid causing excessive muzzle. blast.

"Furthermore, as the compressed ,gases *leaveithe gun barrel, apartial vacuumis formedthereiwalid a"momentary onrush of air into thebarreluesults. fit-is within the contemplation ofthis inventionto control these compressed gases and thisgonrushing airlbyfde- 'flection and/or constriction or, by tdtherwise'channel- 'ing them, and particularly the' compressed gases so'that the inherent disadvantages created by 'the EZKPEfiSiQIlZOf the compressed "gases are either entirelyfeliminated, 'or satisfactorily solved.

The 'quintessence :of the "-invention isto iprovideia device adapted either *for removable: attachmenfltothe muzzle end of the igun barrel, or *mddifying'the :gun

barrel soas to make this device'an'integral part thereof, which employs these 'expanding gasesand onrushingiair to reduce the recoil shock, minimize: the blast-and eliminate the tendency of the gun to climb upwaijdly-ori being fired.

The principal object of my'invention-istofprovide a device for the muzzle end of'a g n barrel having means 'for directingupwardly some 'o-f-thecompressed ;gases emanating from the muzzle, two stage"means--for' -partially constricting these gases to 'act-as a'ibrake there- -for, and finally, means for conjointly 'directing the re:

maining compressed gases upwardly --arid ;outwardly through a gradually enlarged dischargeiend. 4

'A corollary to the principal object ofmy inverition is to provide means in the device foremployiiig'the-air entering the gun barrel as the compressedggasesgare discharged to assist in controlling the gun firing-position' of the gun by eliminating the tendency- 3f the-"gun to climb upwardly on being fired.

Another object of my invention istoyproiride anuhi- *tary device'possessingstructural =-characteristics which "performs the above-functions without mateii'ally 'dncreas c2 I ing the weight, northeilength offthe gunynor measun .ably disturb its balance. V

A still further object of my invention. is 'to;prov 1de;a

'device whichmay be firmly secured tofthermuzzle end 5 of .a gun barrel without the services of'a .gunsmith'and which, when properly attachedg practically .eliminates'its radialor forward slippage on.the gun' barrel during long periods of firing.

.A still further objectrof :my invention, istoprovide .a.muzzle equalizer and blast,,minimizerwhich is .sturdy but lightin weight, compact and inexpensive, easy to attach and applyto a standard.;gun 'barrelv'vithout disturbing the. frontsightrnor damage the barrel.

A full and complete understanding otrmy invention 'and other objects, advantages andnov'el'characteristics .thereof willbecome apparent and readily-understood from 'the following "detailed description z which mustba :read. in connection WilhTthe "disclosures in 'the accom- .panying drawing; forming a part :hereof, and in which: Fig. 1, is'a'side elevational .viewof the device:ernbo'dying the "principles of my "invention shown mounted -,on themuzzlejofagun'barrel; V p 7 Fig. 2 is an enlarge'd top plan-view,;pa1tially"broken away, of the device embodying the principles Qfymy invention'ta'kenonline2 2 of Figfil; V v

Fig. 3 is afront elevational viewtaken-on'line'"3"3 of Fig. 2;

Fig. .4 is a sectional elevation of the device embody- .ing the. principles of my inventionqtaken QI1:1l 1i e '4 -4 30,of'?-Eig."2 to show.the structural characteristics Q'fthe interior; V V

Fig. .5 is a sectional .elevationj taken ,on"1jne f5 f5 .of "Fig.4;

'Fig..6.vis a seetion'al'eleva'tion taken onfline ti -opf Fig. .4 to show thedetails of construction ofrthe semiicircular: eccentric groove; and V U Fig. '7'is -a sectional elevation takenpnll ncfi747rof Fig. 4 to showthe details of construction Vo'fithe. circu- 'lar .groove. N V p I 40 f'The device embodyingv my'invention consists prjmajrlily "Offfl unitary body member L preferably cylindlziqailiin contour, having a,borei2 centrally 'disposed'itherethrough, pthediameter of which is slightly larger thanthe Idjangeter of theibore :0f the. gun barrel to which: theWdQYiE C 'is .attached'or isan integralpart thereof, -when measured from "thelbottom of ..the rifiinggrooves, thereby pernn definite'break in contact of the .lmllet with'jthe gun bore 'Without effecting-the control of. the compressed gases and 'onrushing' air by the structural characteristics of the unitary body 'member' 1. .The'front endiq ofthe' bodyrnemberhas a counterborewhichl is rtapered rearwar ly, ..as shown at 4. A cucoutportion, as shown atfi ismade directlyabovethe taperedcounterbore 4 and has ,a ,r earwardly inclined face fi'forme'd therein. V 'An externally threadedcollet' 7,.formed at jthe rearend of body member 1, hasa plurality,ofopenendedslots 8 formed longitudinally therein to proyide. afiliQht tapering rearwardlythereof. .Collet '7. fits, overthermuzzleend of a gunbarrel 9 .fancifullyrepresentedim Eig. l. Aminternal vice is made as an integral part of the barrel, no problem of a tight connection exists.

An angular cut out or notch 12 is made transversely of body member 1 immediately in front of the muzzle end of gun barrel 9 and sufficiently deep to penetrate the interior of bore 2 as graphically shown in Figs. 1, 2 and 4. The rear portion of the cut out is vertically positioned while the front face slopes forwardly and outwardly, as shown at 13 and almost meets the top of face 6 of the cut out portion at their common apex 14. The function of this cut out portion will be explained forthwith.

A crescent shaped eccentric groove 15 is formed in bore 2 approximately midway of and below the cut out portion 12 of body member 1. The front Wall 16 of groove 15 is positioned at right angles to the bore 2 while the base 17 of the groove 15 is inclined rearwardly at an obtuse angle to the bore 2. Another groove 18 is formed within bore 2 slightly in front of the crescent shaped eccentric groove 15 approximately below the apex 14 formed by the junction of the

respective faces

6 and 13 of cut out

portions

5 and 12 respectively. Groove 18 is an iota deeper than the eccentric groove 15, in fact it is almost imperceptible and difiicult to reveal in the drawing, but its front wall 19 is parallel to the front wall 16 of groove 15 as indicated by the lines marked y in Fig. 4 and its base 26 is rearwardly inclined at the same angle as the angle of base 17 of groove 15 as graphically shown by the lines marked x in Fig. 4.

The specific function of these structural characteristics as well as the others, will now be explained.

M odus operandi The device embodying the principles of my invention dealing as it does with compressed gases seeking to expand after escaping from a gun barrel, employs Newtons physical law of motion in controlling the movement of these gases and their ultimate dissipation as well as controlling the onrushing air entering the gun barrel to fill the partial vacuum created by the emergence of the gases from the gun barrel. As these gases escape from the gun barrel a limited amount is deflected upwardly and expands through the cut-out portion 12 of the device. Newtons physical law referred to above states that for every action there is an equal and opposite reaction-the jet propulsion principlecomes into play and as these gases expand upwardly through cut-out 12, a corresponding downward reaction results which, acting against the body member 1 secured to the gun barrel 9, helps to suppress the muzzle rise usually accompanying the recoil shock. The same principle comes into play but with lesser effect when the onrushing air begins to enter the gun barrel to fill the partial vacuum created by the emergence of the compressed gases and this also helps to suppress muzzle rise. As the remaining gases leave the device through its front, their expansion upwardly through cut-out portion 5 is a further aid to muzzle holddown.

Resistance to the smooth flow of the compressed gases which do not escape through cut-out 12 is first offered by the crescent shaped eccentric groove 15 and then by circular groove 18 in bore 2. The presence of these grooves possessing the structural characteristics delineated above creates a sufficient turbulence in the bore 2 and resistance to the smooth flow of the escaping compressed gases toward the front of the device so as to create a momentary trap or a brake therefor-thus a suificient restrictive force is imposed upon these compressed gases which counteracts the normal excessive recoil on firing of a high powered rifle and thereby minimizes the same.

As these remaining gases seek to escape through the body member 1, the counterbore at the front thereof allows them to spread over a much larger area making it easier for their expansion. This structural characteristic of the device and the escape of some of the gases through cut-out 12, minimizes the muzzle blast normally encountered when no blast suppressor or similar device is employed.

As some changes are possible in the embodiment of the invention above set forth, it is to be understood that all matter herein set forth or shown in the accompanying drawing is to be interpreted as illustrative of the invention, and not in a limiting sense, but any permissible change must fall within the purview of the following claims, in which I claim as new and desire to secure by Letters Patent: 7

1. A new article of manufacture to be used in conjunction with guns adapted to fire projectiles, comprising a body member supportable by and projecting in advance of the muzzle of a gun barrel, said body member having a bore in line with the bore of the barrel through which a projectile may pass but being slightly larger in diameter, a counterbore formed at the front end of said body member in line with the bore thereof but uniformly tapering outwardly therefrom, a cut-out portion formed in said body member immediately above said tapered counterbore, the face of which extends angularly and rearwardly from the front of said body member, another cut-out portion formed immediately in back of said first cut-out portion and entering into the bore of said body member with its face extending angularly and forwardly toward the front of said body member, a circular groove formed in the bore of said body member immediately below the juncture of the respective faces of said cut-out portions, a crescent shaped eccentric groove formed within said bore immediately in back of said circular groove and below the rearwardly positioned cut-out portion, and means for anchoring said body member to the muzzle end of a gun barrel.

2. A new article of manufacture to be used in conjunction with guns adapted to fire projectiles, comprising a body member supportable by and projecting in advance of the muzzle of a gun barrel, said body member having a bore in line with the bore of the barrel through which a projectile may pass but being slightly larger in diameter, a counterbore formed at the front end of said body member in line with the bore thereof but uniformly tapering outwardly therefrom, a cut-out portion formed in said body member immediately above said tapered counterbore the face of which extends angularly and rearwardly from the front of said body member, another cut-out portion formed immediately in back of said first cut-out portion and entering into the bore of said body member with its face extending angularly and forwardly toward the front of said body member, a circular groove formed in the bore of said body member immediately below the juncture of the respective faces of said cut-out portions, a crescent shaped eccentric groove formed within said bore immediately in back of said circular groove and below the rearwardly positioned cut-out portion, the front wall of each of said grooves being parallel to each other with the circumference of the wall of the circular groove being greater than that of the wall of the crescentshaped groove and the base of each of said grooves being angularly disposed to the bore of said body member, and an externally threaded collet having a plurality of longitudinal slits therein extending from said body member and adapted to fit over the muzzle end of a gun barrel, and a lock nut threadably secureable thereto to anchor said collet to said muzzle end of a gun barrel.

3. A new article of manufacture to be used in conjunction with guns adapted to fire projectiles, comprising a body member supportable by and projecting in advance of the muzzle of a gun barrel, said body member having a bore in line with the bore of the barrel through which a projectile may pass but being slightly larger in diameter, a counterbore formed at the front end of said body member in line with the bore thereof but uniformly tapering outwardly therefrom, a cut-out portion formed in said body member immediately above said tapered counterbore the face of which extends angularly and rearwardly from the front of said body member, another cut-out portion formed immediately in back of said first cut-out portion and entering into the bore of said body member with its face extending angularly and forwardly toward the front of said body member, a circular groove formed in the bore of said body member immediately below the juncture of the respective faces of said cut-out portions, and a crescent shaped eccentric groove formed within said bore immediately in back of said circular groove and below the rearwardly positioned cut-out portion.

4. A new article of manufacture to be used in conjunction with guns adapted to fire projectiles, comprising a body member supportable by and projecting in advance of the muzzle of a gun barrel, said body member having a bore in line with the bore of the barrel through which a projectile may pass but being slightly larger in diameter, a counterbore formed at the front end of said body member in line with the bore thereof'but uniformly tapering outwardly therefrom, a cut-out portion formed near the rear of said body member and entering into the bore of said body member with its face extending angularly and forwardly toward the front of said body member, a circular groove formed in the bore of said body member immediately to the rear of said tapered counterbore, a crescent shaped eccentric groove formed within said bore immediately in back of said circular groove and below the rearwardly positioned cut-out portion, the front wall of each of said grooves being parallel to each other with the circumference of the wall of the circular groove being greater than that of the Wall of the crescent-shaped groove and the base of each of said grooves being angularly disposed to the bore of said body member, and means for anchoring said body member to the muzzle end of a gun barrel.

5. A new article of manufacture to be used-in conjunction with guns adapted to fire projectiles, comprising a body member supportable by and projecting in advance of the muzzle of a gun barrel, said body member having a bore in line with the bore of the barrel through which a projectile may pass but being slightly larger in diameter, a counterbore formed at the front end of said body member in line with .the bore thereof but uniformly tapering outwardly therefrom, a cut-out portion formed near the rear of said body member and entering into the bore of said body member with its face extending angularly and forwardly toward the front of said body member, a circular groove formed in the bore of said body member immediately to the rear of said tapered counterbore face of said cut-out portion, a crescent shaped eccentric groove formed within said bore immediately in back of said circular groove and below the rearwardly positioned cut-out portion, an externally threaded collet having a plurality of longitudinal slits therein extending from said body member and adapted to fit over the muzzle end of a gun barrel, and a lock nut threadably 'secureable thereto to anchor said collet to said muzzle end of a gun barrel.

References Cited in the file of this patent UNITED STATES PATENTS 817,134 Smith Apr. 3, 1906 1,988,807 Pierson Oct. 12, 1932 2,567,826 Prache Sept. 11, 1951 FOREIGN PATENTS 972,500 France Apr. 30, 1950