US3491650A - Firearm - Google Patents

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Publication number
US3491650A
US3491650A US3491650DA US3491650A US 3491650 A US3491650 A US 3491650A US 3491650D A US3491650D A US 3491650DA US 3491650 A US3491650 A US 3491650A
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Prior art keywords
barrel
breech block
cartridge
recoil
fire
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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Inventor
Edwin Rohr
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HAMMERLI AG
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HAMMERLI AG
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41WEAPONS
    • F41AFUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A3/00Breech mechanisms, e.g. locks
    • F41A3/64Mounting of breech-blocks; Accessories for breech-blocks or breech-block mountings
    • F41A3/78Bolt buffer or recuperator means
    • F41A3/82Coil spring buffers
    • F41A3/86Coil spring buffers mounted under or above the barrel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41WEAPONS
    • F41AFUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A21/00Barrels; Gun tubes; Muzzle attachments; Barrel mounting means
    • F41A21/28Gas-expansion chambers; Barrels provided with gas-relieving ports
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41WEAPONS
    • F41AFUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A3/00Breech mechanisms, e.g. locks
    • F41A3/64Mounting of breech-blocks; Accessories for breech-blocks or breech-block mountings
    • F41A3/78Bolt buffer or recuperator means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41WEAPONS
    • F41CSMALLARMS, e.g. PISTOLS, RIFLES; ACCESSORIES THEREFOR
    • F41C23/00Butts; Butt plates; Stocks
    • F41C23/06Stocks or firearm frames specially adapted for recoil reduction
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41WEAPONS
    • F41CSMALLARMS, e.g. PISTOLS, RIFLES; ACCESSORIES THEREFOR
    • F41C27/00Miscellaneous attachments for smallarms; Accessories; Details not otherwise provided for
    • F41C27/22Balancing or stabilising arrangements on the gun itself, e.g. balancing weights

Description

Jan. 27, 1970 E. ROHR 3,491,650

FIRE ARM Filed Aug. 15. 1967 2 Sheets-Sheet 1 "I! III,

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Jan. 27, 1970. E. RQHR 3,491,650

FIRE ARM Filed Aug. 15, 1967 2 Sheets-Sheet 2 Fig. 4

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Fig. 6

Edwin Kohll United States Patent 3,491,650 FIREARM Edwin Rohr, Wettingen, Switzerland, assignor to Hammerli AG., Switzerland, a corporation of Switzerland Filed Aug. 15, 1967, Ser. No. 660,743 Claims priority, application Switzerland, Aug. 18, 1966, 12,046/ 66 Int. Cl. F41c 3/00 US. Cl. 89-194 Claims ABSTRACT OF THE DISCLOSURE A fire-arm having a breech block which is driven rearwardly under the explosive force of a fired cartridge and a recoil spring returning the breech block into the firing position and in particular a piston. To reduce the recoil effect and to avoid the tendency of the free end of the barrel to sweep upward as a consequence of the recoil a compensating mass is provided in the fire-arm which is movable substantially parallel to the barrel and which has a mass corresponding substantially to that of the breech block. Means are provided for transmitting to the mass member a force impulse corresponding to the force impulse received by the breech block when firing a cartridge to impart to the mass member a movement corresponding to and coinciding with, respectively, the movement of the breech block but having an opposite direction.

BACKGROUND OF THE INVENTION Present day hand fire-arms, i.e. pistols have a very intensive recoil. This recoil has the effect of generally throwing the barrel out of alignment with the target, e.g. of swinging the free end of the barrel upwards and to the left if the pistol is gripped with the right hand. The strong recoil is due, on the one hand, to the gas pressure necessary for moving the breech block back while ejecting the fired cartridge and for tensioning the recoil spring which latter returns the breech block into the firing position while a new cartridge is fed into the cartridge chamber. On the other hand, high muzzle velocities are required to obtain the necessary accuracy.

As an example showing the disadvantageous effect of high recoil, the case of the Olympic rapid fire program may be taken. Here five shots must be fired within four seconds on targets yards away. The targets are spaced two and a half feet apart and each shot must be on a different target. In view of the high rate of fire, little time remains for aiming and it is time consuming if the barrel must not only be swung sidewise to find the new target but connected downwardly to return the barrel to the correct height.

Attempts have already been made at reducing the recoil and particularly at avoiding the upward thrust of the barrel produced thereby. In this context it should be noted that the method attaching additional weights to the pistol to reduce the upward movement of the barrel is not feasible since in many instances the total weight as well as the dimensions of the pistol are limited. It has been proposed to provide one or more gas escape openings at the upper side of the barrel communicating with the bore in front of the cartridge chamber. However, it was found that the resulting reaction force on the barrel is insuflicient to counteract the upward thrust resulting from the recoil. It should be noted that the quantity of gas available for producing the reaction force is limited since it causes a reduction in muzzle velocity tending to impair the accuracy of the weapon.

3,491,650 Patented Jan. 27, 1970 SUMMARY OF THE INVENTION Accordingly, it is a primary object of the present invention to provide an improved fire-arm which has a reduced recoil.

Another significant object of the present invention is the provision of an improved fire-arm which reduces the tendency of the barrel to swing upwardly during recoil upon the firing of a cartridge.

A further noteworthy object of the present invention relates to an improved pistol of the type used for Olympic shooting events which facilitates aiming and permits rapid fire.

Still another object of the present invention is the provision of an improved pistol which, while being of compact construction and having a relatively small weight, avoids high gas pressure losses and significant reduction in muzzle velocity in order to reduce recoil.

Now, in order to achieve these and still further objects of the invention which will become more readily apparent as the description proceeds, the fire-arm according to the invention is equipped with a barrel supported by a frame and having a cartridge chamber at one end. A breech block is movable on said frame toward and away from the cartridge chamber end of the barrel, a recoil spring urging said breech block toward said cartridge chamber end into a closed position while the gas pressure of a fired cartridge moves said breech block away from said cartridge chamber end while compressing said recoil spring. According to one significant aspect of the invention a movable compensating mass member is arranged adjacent the barrel, such mass member having a mass corresponding to that of the breech block. Means are provided to impart to the mass member a movement substantially equal to that of the breech block and simultaneously therewith but in an opposite direction as a result of the gas pressure of a fired cartridge. A return spring acts on the mass member to return the latter at the end of said movement.

Due to the movement of the mass member upon firing of a cartridge, the recoil movement of the breech block is substantially compensated for so that the tendency of the barrel to swing out of alignment with the target is reduced or avoided.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be better understood, and objects other than those set forth above, will become apparent, when consideration is given to the following detailed description thereof. Such description makes reference to the annexed drawings depicting three exemplary embodiments of the inventive fire-arm in the form of a rapid fire pistol for target contests, and wherein:

FIGURE 1 schematically illustrates in vertical section a pistol in accordance with a first embodiment of the invention;

FIGURE 2 illustrates the barrel of the pistol depicted in FIGURE 1 in a plan view and partly in section;

FIGURE 3 is a fragmentary elevational view of the pistol with the breech block being in the rearward end position;

FIGURE 4 illustrates in section a fragmentary view of a pistol barrel in accordance with a second embodiment of the invention;

FIGURE 5 is a representation corresponding to FIG- URE 4 in another position of the parts of the barrel; and

FIGURE 6 shows in vertical section a third embodiment of a pistol.

3 DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIGURE 1 reference numeral 1 designates the cartridge chamber of a pistol barrel generally indicated at 27. Numeral 2 indicates a breech block movable between a forward position, shown in FIGURE 1, in which the cartridge chamber 1 is closed and a rearward posi tion, shown in FIGURE 3, in which the cartridge chamber is accessible for feeding a cartridge into the cartridge chamber or for ejecting an empty cartridge therefrom. Frame member 28 forming a pistol grip and having secured thereto the barrel 27, contains a cock mechanism comprising a cock 3 pivotably supported in frame member 28, a push rod 36 engaging cock 3 and being biased by a cock spring 4 and a pivotable cock release member 6 engagable with a ratchet tooth 5 on cock 3 under the influence of a leaf spring 35. Numeral 32 indicates a trigger arranged within a trigger guard 30 and pivotably secured to frame member 28 at 34. A trigger rod 33 interconnects trigger 32 with trigger release member 6 to disengage the latter from ratchet tooth 5 0n cock 3 and permit the latter to swing in clockwise direction under the influence of cock spring 4 when trigger 32 is actuated.

Arranged within breech block 2 for movement therewith is a lock member 26 movably supporting firing pin 25, which lies in the path of cock 3 when the latter pivots in clockwise direction.

The breech block 2 is normally held in closed position by a recoil spring 21 arranged in frame member 28 adjacent barrel 27 and parallel thereto. To this end, recoil spring 21 which is guided on a spring pin 31, abuts with its one end against the frame whereas the other end acts on an extension 2 of breech block 2. Under the effect of the gas pressure developed by a fired cartridge, the breech block 2 is thrown backwards against the action of recoil spring 21, thereby compressing the latter. During such recoil movement of the breech block or while being manually drawn back, firing pin 25 and lock member 26 abut against cock 3 and rotate the latter in anticlockwise direction, thereby displacing push rod 36 downward and compressing cock spring 4. When cock 3 has reached the position indicated in FIGURE 1, lock release member 6 engages cock 3 and retains the mechanism in cocked position if the trigger 32 has been previously released. The recoil movement of breech block 2 is limited by an abutment 29 situated in the path of extension 2' (FIGURE 3). During its forward move ment under the influence of spring 21, breech block 2 engages a new cartridge from magazine 23 arranged in the pistol butt or grip of frame 2 8. Such cartridge is fed into the cartridge chamber upon completion of the return movement of breech block 2 into the closed position. The pistol is therefore ready for firing. The pistol so far described is conventional and consequently its operation will be readily understood by those skilled in the art.

In accordance with the invention, the pistol is provided with means for reducing recoil in the form of a movable compensating mass member 8. With further reference to FIGURE 1 it will be seen that compensating mass member 8 which has the form of a piston is slidably arranged in a cylinder 16 extending beneath barrel 27 and parallel thereto and being secured to frame member 28. At its forward end, cylinder 16 is closed 011? by a threaded plug having an air vent therein. A return spring 9 arranged in cylinder 16 and having one end resting on plug 10 engages with its other end piston 8 and tends to maintain the latter in the rearward end position indicated in FIGURE 1. As will be seen from FIGURES 1 and 2, transmission means in the form of two bleed channels 7 are connected to the rearward end of cylinder 16 and communicate each with a bleed bore 17 provided in the barrel 27 forward of the cartridge 91 2.11. 1 l but closely adjacent thereto.

It will be understood that as a cartridge is fired in cartridge chamber 1 of the barrel by the impact of cock 3 on firing pin 25, gas pressure is developed in the barrel accelerating the bullet to muzzle velocity. On the other hand, back pressure is exerted onto the empty shell so that the latter drives the breech block rearward. Due to the bleed bores 17, gas pressure is also transmitted to the cylinder 16 by way of channels or tubes 7 and such gas pressure exerts a force upon the piston 8 to accelerate the latter against the action of return spring 9. The mass of the piston 8 is chosen so as to substantially correspond to the mass of the breech block and by suitably dimensioning the bleed bores with regard to their cross section the piston which forms the compensating mass will carry out a movement substantially counteracting the recoil effect, at least to the extent transmitted by the breech block. It will be noted that cylinder 16 is provided with an opening or slot 22, which permits escape of the expanded gas when the piston '8 hits the plug at the end of its forward movement.

Reference is now made to FIGURES 4 and 5 showing a further preferred embodiment. For the sake of clarity, the conventional parts of the pistol, which may have the construction described with reference to FIGURES 1, 2 and 3 are omitted. Again, reference numeral 28 indicates the :frame member receiving the rearward or cartridge chamber end of barrel 27. An annular mass member 12 is slidably arranged on barrel 27 and surrounds the latter. Movement of the mass member 12 is limited on the one hand by frame member 28 and on the other hand by an abutment ring 13 seated on the forward or muzzle end of the barrel. The barrel is further surrounded by a compression spring 14 having one end bearing against the abutment ring 13, whereas the other end of such spring acts against the mass member and tends to hold the latter in abutting relation with the frame member 28 as indicated in FIGURE 4.

A plurality of axially extending bores 18, forming gas chambers is provided in the mass member 12. In the rearward position of such member bores 18 are engaged by the ends of axially extending transmission means in the form of tubes 19 having their other ends seated in frame member 28 and communicating with the bore of the barrel forward of the cartridge chamber 1 by way of bleed openings 20.

Again, when cartridge in chamber 1 is fired a portion of the explosive gas will bleed through opening 20 and the pressure of the gas will be transmitted to the annular mass member through the tubes 19 and the bores 18. Consequently, forward movement will be imparted to mass member 12 to counteract the effect of the rearward movement of the breech block, as has been described in connection with FIGURES 1 to 3. During the forward movement spring 14 will be compressed. The explosive gas may escape as soon as the bores 18 have liberated the forward ends of tubes 19. Spring 14 subsequently returns mass member 12 from the forward position shown in FIGURE 5 to the rearward position of FIGURE 4.

While in the embodiments so far described, movement is transmitted to the mass member directly from the gas pressure developed by the cartridge, it is also possible to transmit such movement from the breech block, i.e. from a mechanical part moved by such gas pressure and an embodiment of this type is illustrated in FIG- URE 6.

It will be noted that breech block 2 is slidably guided in frame member 28 which supports the barrel 27. A compensating mass member 42 in the form of a slide is arranged below breech block and barrel in a recess 40 of frame 28. A return spring 43 arranged in recess 40 tends to hold mass member or slide 42 in its rearward position as shown in FIGURE 6. Slide 42 is provided with a rearwardly extending tooth rack and a gear wheel 37 rotatably supported in frame 28 meshes with such rack. On the other hand, gear wheel 37 is engaged by a tooth rack 44 provided on breech block 2.

Consequently, when breech block 2 is driven rearward upon firing of a cartridge, it rotates gear wheel 37 and the latter drives the slide 42 forward at a velocity corresponding to that of the breech block. Thereby the recoil effect of the breech block is effectively compensated. Return spring 43 returns slide 42 into the rearward position.

Tests made with pistols constructed in accordance with the invention have shown good results with respect to the reduction of the recoil effect.

While there is shown and described present preferred embodiments of the invention, it is to be distinctly understood that the invention is not limited thereto, but may be otherwise variously embodied and practiced within the scope of the following claims.

What is claimed is:

1. A fire-arm comprising, in combination,

(a) a frame member;

(b) a barrel supported by said frame member and having a cartridge chamber end;

(c) a breech block arranged for reciprocable movement towards and away from said cartridge chamber end of said barrel;

(d) a recoil spring cooperating with said breech block for urging the latter toward said cartridge chamber end, said breech block being driven rearwardly away from said cartridge chamber end by the explosive force of a fired cartridge;

(e) a distinct compensating mass member operable only to stabilize the fire-arm, said distinct compensating mass member being movable in a path parallel to said barrel between two end positions, said compensating mass member having a mass corresponding substantially to the mass of said breech block;

(f) a return spring cooperating with said compensating mass member and urging the latter on said path toward one of said end positions; and,

(g) means for imparting to said compensating mass member a movement directed toward said forward position corresponding substantially to the movement imparted to said breech block by the explosive force of a fired cartridge and substantially concurrent therewith to thereby reduce the recoil.

2. A fire-arm as claimed in claim 1, wherein said compensating mass member is in the form of a piston.

3. A fire-arm as claimed in claim 2, further including a cylinder attached to said frame and containing said piston slidably arranged therein, said transmission means comprising a bleed channel interconnecting said barrel with said cylinder, said return spring being arranged in said cylinder.

4. A fire-arm as claimed in claim 3, wherein said bleed channel terminates in a bleed bore communicating with the bore of said barrel adjacent said cartridge chamber end thereof.

5. A fire-arm as claimed in claim 2, wherein said piston is formed by an annular member surrounding said barrel and slidable thereon, said member having gas chamber means formed therein, said transmission means communicating with said gas chamber, said return spring surrounding said barrel.

6. A fire-arm as claimed in claim 5, wherein said gas chamber means cmoprises a plurality of axially extending bores, and wherein said transmission means include stationary axially extending tubes extending into said bores ad communicating with bleed openings provided in said barrel. 1

7. A fire-arm as claimed in claim 1, wherein said transmission means interconnect said compensating mass member with said breech block.

8. A fire-arm as claimed in claim 7, wherein said compensating mass member is formed by a slide.

9. A fire-arm as claimed in claim 7, said transmission means comprising a first tooth rack on said breech block, a second tooth rack on said compensating mass member and gear means meshing with said first and second tooth rack and supported for rotation by said frame.

10. In a fire-arm having a frame, a barrel supported by said frame and having a cartridge chamber end, a breech block arranged for reciprocable movement towards and away from said cartridge chamber end of said barrel, a recoil spring cooperating with said breech block for urging the latter toward said cartridge chamber end, said breech block being driven away from said cartridge chamber end by the explosive force of a fired cartridge, the improvement comprising a distinct compensating mass member operable only to stabilize the fire-arm, said distinct compensating mass member being movable in a path substantially parallel to said barrel between a rearward position and a forward position, said compensating mass member having a mass corresponding substantially to the mass of said breech block, means for imparting to said compensating mass member a movement directed toward said forward position to substantially counteract the recoil effect of said breech block when driven away from said cartridge chamber end.

References Cited UNITED STATES PATENTS 891,778 6/1908 Mertens 891.7 X 1,786,207 12/1930 Hudson 89-191 X 3,273,460 9/1966 Mason 89-191 X 827,259 7/1906 McClean 89l28 2,940,202 6/1960 Harper 89-l94 X 3,208,348 9/1965 Lee 8914.3

SAMUEL W. ENGLE, Primary Examiner U.S. Cl. X.R. 89-14, 42, 196

US3491650A 1966-08-18 1967-08-15 Firearm Expired - Lifetime US3491650A (en)

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CH1204666A CH438097A (en) 1966-08-18 1966-08-18 Handgun

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0010509A2 (en) * 1978-08-11 1980-04-30 CENTRE STEPHANOIS DE RECHERCHES MECANIQUES HYDROMECANIQUE ET FROTTEMENT Société dite: Firearm with electric firing mechanism and process for its operation; ammunition and primers therefor
US4467697A (en) * 1979-08-09 1984-08-28 Leonard Witt Anti-recoil arrangement
US5097614A (en) * 1990-05-01 1992-03-24 Strong B Gene Riot gun
US6345463B1 (en) * 1999-07-02 2002-02-12 Les C. Baer, Sr. Extended dust cover for a handgun
EP1309829A2 (en) * 2000-03-02 2003-05-14 Vader Pty Ltd Recoil control mechanism for a weapon
US20050246931A1 (en) * 2003-10-30 2005-11-10 Poff Charles R Jr Recoil dampening assembly
US20150247697A1 (en) * 2012-09-14 2015-09-03 William A. Hangen Firearm Configuration For Reducing Recoil
US20150377583A1 (en) * 2014-06-27 2015-12-31 Akihisa FURUSHO Recoil reducer when shooting bullet from firearm
WO2016134394A1 (en) * 2015-02-23 2016-09-01 Faisal Kedairy Recoil attenuating mechanism for a firearm
US9644909B2 (en) 2012-09-14 2017-05-09 5794 Corporation Firearm configuration for reducing recoil
US20180003012A1 (en) * 2016-06-30 2018-01-04 Speciality Earth Sciences, Llc Apparatus and method for puncturing a pipe
US9995551B2 (en) * 2016-03-02 2018-06-12 Newell Keith Whitfield, JR. Universal custom recoil solution system
RU2659177C1 (en) * 2017-01-26 2018-06-28 Николай Николаевич Киреев Barrel of sporting weapons
US10048028B2 (en) * 2016-01-20 2018-08-14 Akihisa FURUSHO Low recoil firearm

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19951536C1 (en) * 1999-10-26 2001-07-12 Peter Raedlinger Hand gun has counter-weight displaced in opposition to movement of slide between firing and ejection/reloading positions

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US827259A (en) * 1900-02-17 1906-07-31 Mcclean Arms And Ordnance Company Discharge-actuated gun.
US891778A (en) * 1908-04-25 1908-06-23 Ludwig Mertens Non-recoiling firearm.
US1786207A (en) * 1927-12-12 1930-12-23 Automatic Guns Inc Machine gun
US2940202A (en) * 1957-10-04 1960-06-14 Murry D Harper Target pistol
US3208348A (en) * 1964-10-12 1965-09-28 Clarence H Lee Gun muzzle attachment device for counteracting recoil
US3273460A (en) * 1965-06-14 1966-09-20 James D Mason Firearm with gas operated breech block unlocking means

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US827259A (en) * 1900-02-17 1906-07-31 Mcclean Arms And Ordnance Company Discharge-actuated gun.
US891778A (en) * 1908-04-25 1908-06-23 Ludwig Mertens Non-recoiling firearm.
US1786207A (en) * 1927-12-12 1930-12-23 Automatic Guns Inc Machine gun
US2940202A (en) * 1957-10-04 1960-06-14 Murry D Harper Target pistol
US3208348A (en) * 1964-10-12 1965-09-28 Clarence H Lee Gun muzzle attachment device for counteracting recoil
US3273460A (en) * 1965-06-14 1966-09-20 James D Mason Firearm with gas operated breech block unlocking means

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0010509A2 (en) * 1978-08-11 1980-04-30 CENTRE STEPHANOIS DE RECHERCHES MECANIQUES HYDROMECANIQUE ET FROTTEMENT Société dite: Firearm with electric firing mechanism and process for its operation; ammunition and primers therefor
EP0010509A3 (en) * 1978-08-11 1980-12-10 CENTRE STEPHANOIS DE RECHERCHES MECANIQUES HYDROMECANIQUE ET FROTTEMENT Société dite: Firearm with electric firing mechanism and process for its operation; ammunition and primers therefor
FR2460468A2 (en) * 1978-08-11 1981-01-23 Stephanois Rech Mec Weapon electrical control, method of operation and used ammunition
US4467697A (en) * 1979-08-09 1984-08-28 Leonard Witt Anti-recoil arrangement
US5097614A (en) * 1990-05-01 1992-03-24 Strong B Gene Riot gun
US6345463B1 (en) * 1999-07-02 2002-02-12 Les C. Baer, Sr. Extended dust cover for a handgun
US6477802B2 (en) 1999-07-02 2002-11-12 Les C. Baer, Sr. Extended dust cover for a handgun
EP1309829A2 (en) * 2000-03-02 2003-05-14 Vader Pty Ltd Recoil control mechanism for a weapon
EP1309829A4 (en) * 2000-03-02 2006-03-29 Vader Pty Ltd Recoil control mechanism for a weapon
US20050246931A1 (en) * 2003-10-30 2005-11-10 Poff Charles R Jr Recoil dampening assembly
US9546832B2 (en) 2012-09-14 2017-01-17 William A. Hangen Firearm configuration for reducing frame battering
US20150247697A1 (en) * 2012-09-14 2015-09-03 William A. Hangen Firearm Configuration For Reducing Recoil
US9644909B2 (en) 2012-09-14 2017-05-09 5794 Corporation Firearm configuration for reducing recoil
US9551542B2 (en) 2012-09-14 2017-01-24 William A. Hangen Firearm configuration for reducing recoil
US9194650B2 (en) * 2012-09-14 2015-11-24 William A. Hangen Firearm configuration for reducing recoil
US20150377583A1 (en) * 2014-06-27 2015-12-31 Akihisa FURUSHO Recoil reducer when shooting bullet from firearm
WO2016134394A1 (en) * 2015-02-23 2016-09-01 Faisal Kedairy Recoil attenuating mechanism for a firearm
US9897403B2 (en) 2015-02-23 2018-02-20 Skychase Holdings Corporation Recoil attenuating mechanism for a firearm
US10048028B2 (en) * 2016-01-20 2018-08-14 Akihisa FURUSHO Low recoil firearm
US9995551B2 (en) * 2016-03-02 2018-06-12 Newell Keith Whitfield, JR. Universal custom recoil solution system
US20180003012A1 (en) * 2016-06-30 2018-01-04 Speciality Earth Sciences, Llc Apparatus and method for puncturing a pipe
US10053964B2 (en) * 2016-06-30 2018-08-21 Specialty Earth Sciences, Llc Apparatus and method for puncturing a pipe
RU2659177C1 (en) * 2017-01-26 2018-06-28 Николай Николаевич Киреев Barrel of sporting weapons

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