EP0367308A1 - Arme à feu - Google Patents

Arme à feu Download PDF

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Publication number
EP0367308A1
EP0367308A1 EP89201234A EP89201234A EP0367308A1 EP 0367308 A1 EP0367308 A1 EP 0367308A1 EP 89201234 A EP89201234 A EP 89201234A EP 89201234 A EP89201234 A EP 89201234A EP 0367308 A1 EP0367308 A1 EP 0367308A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
barrel
piston
slide
flaw
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.)
Withdrawn
Application number
EP89201234A
Other languages
German (de)
English (en)
Inventor
Robert Darville
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GMS SA
Original Assignee
GMS SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by GMS SA filed Critical GMS SA
Publication of EP0367308A1 publication Critical patent/EP0367308A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A25/00—Gun mountings permitting recoil or return to battery, e.g. gun cradles; Barrel buffers or brakes
    • F41A25/22—Bearing arrangements for the reciprocating gun-mount or barrel movement

Definitions

  • the present invention relates to a fire weapon comprising a frame on which a slide is mounted, a unit formed by a barrel and a member being lodged into said slide, said member being provided with a chamber for receiving a projectile and direct it along the axis of said barrel, which issues forth into said chamber.
  • Such a fire weapon is generally known when a projectile or a bullet is fired, the explosion of the gunpowder creates an overpressure in the chamber and in the barrel, causing the projectile to move into the barrel.
  • the movement of the projectile into the barrel will cause, due to an increase of the volume, a reduction of the pressure in the part of the barrel situated between the endface of the projectile and the chamber.
  • the slide will be moved in the direction of the movement of the projectile and when the projectile has left the barrel, a spring, which is connected to the slide will cause the slide to move back in a direction opposite to one of the projectile.
  • a drawback of the known fire weapon is that the movement back of the slide, which movement is caused by the spring, is abrupt and causes the well known reaction to the gun-­firer. Further the abrupt movement back causes a wearing of the weapon.
  • a fire weapon is therefor characterized in that said unit further comprises a cylinder of which an end issues forth into said member which is further provided with a flaw connecting said barrel and said cylinder, said flaw issues forth substantially at said end of said cylinder which is provided with a piston having a length substantially equal to the stroke of said cylinder, said piston being rigidly locked with said slide.
  • the presence of a piston moving into a cylinder will slow down the movement back of the slide.
  • the gas present in the cylinder will now be compressed by the piston.
  • the compression of the gas causes a pressure rise of the gas and thus a force opposite to the movement of the piston, reducing still more the speed of the piston movement. Since the piston is rigidly locked with the slide, the movement of the slide will be reduced in the same manner as that of the piston and thus there is obtained a slow movement back of the slide after firing with the weapon.
  • a first preferred embodiment of a fire weapon according to the invention is characterized in that the diameter of said flaw is substantially smaller than the one of the barrel.
  • a second preferred embodiment of a fire weapon according to the invention is characterized in that said flaw issues forth into said barrel at a place substantially situated at the level where a head of a projectile is lodged just before it is fired. When the projectile is fired, it will then first close the flaw so that all the pressure generated by the explosion of the gun-powder can in first instance be used for accelerating the projectile.
  • a third preferred embodiment of a fire weapon according to the invention is characterized in that said piston is provided with at least one ring-groove.
  • the ring-groove will act as a brush on the cylinder when the piston moves inside the cylinder and thus clean the wall of the cylinder.
  • said piston is provided with a spring disposed around an outer wall of said piston. A cooling of the cylinder wall can thus be obtained.
  • the fire weapon 1 preferably a revolver or a gun, shown in figure 1, comprises a grip 2 and a slide 3 mounted on a frame.
  • a barrel 4 which is rigidly locked with the slide by means of a bushing 14.
  • the barrel can move into the slide and can easily be lifted out of the slide.
  • the barrel 4 issues forth into a chamber 8 which is part of a member 12.
  • the chamber 8 is provided for receiving a projectile 9 and directs the projectile along the axis of the barrel.
  • the chamber is provided with an opening situated at the opposite side of the barrel and provided for loading into the chamber a projectile 9 originating from a loader.
  • the dimensions of the barrel, the chamber and the projectile have to be adapted to each other.
  • the materials of which the chamber 8, the member 12 and the barrel are made have to be resistant to the pressure and the contraints imposed by the use of the weapon.
  • the used materials are treatened in such a manner that their hardness is improved.
  • the fire weapon 1 is further provided with a cylinder-­piston system.
  • the cylinder 5 issues forth into the member 12, which is provided with a flaw 10 connecting said barrel to said cylinder.
  • the piston is rigidly locked with said slide by means of the bushing 14 and an end of the piston obturates the cylinder when the piston is at one end of its travel, as shown in figure 2.
  • the length of the piston 6 is substantially equal to the stroke of the cylinder 5 so that the piston can completely enter into the cylinder as shown in figure 3.
  • the piston and the external wall of a part of the cylinder are further provided with a spring 7 which is at its rest position when the piston is located outside the cylinder.
  • the flaw 10 issues forth substantially at an end of the cylinder 5.
  • the diameter of the flaw varies in function of the dimensions of for example the barrel, the cylinder-piston system and the characteristics of the bullets, such as for example the used gun-powder, the weigth and the cartridge-case.
  • the speed of the projectile in the barrel is also preferably considered in determining the diameter of the flaw. For example for a bullet of 9 mm the flaw has a diameter of approximately 1,9 mm.
  • the diameter of the flow 10 is preferably substantially smaller than the one of the barrel for reasons which will be explained here after.
  • the barrel 4 is provided with holes 15, for example four holes, applied in the cylinder casing near the end of the barrel at which the bullets leave the barrel.
  • the holes 15 enable at the moment at which the bullet leaves the barrel, a faster pressure reduction of the pressure build up in the barrel by the explosion of the gun-powder. That pressure reduction on its turn enables that the fly back of the weapon is smoothened.
  • the bushing 14 comprises a semi-cylinder 16 which is mounted in the head of the slide and carries the head of the barrel.
  • the bushing 14 further comprises a semi-circle 17 enabling to rigidly lock the piston 6 with the slide.
  • the bushing is provided with means enabling the slide to rotate over at least 30° with respect to the barrel and to lock the bushing into the slide.
  • the unit formed by the barrel 4, the member 12, the cylinder-piston system 5, 6 and the spring 7 can easily be mounted into the slide.
  • the unit is attached to the slide by means of the bushing 14.
  • the slide and said unit are then mounted as a whole on a frame of a gun or a revolver and locked thereon by means of a slide stop 19 which is applied in an opening of the frame and an opening 18 provided in the member 12.
  • the frame as the barrel are preferably provided with a notch 20, 21, indicating the position at which unlocking the slide from the frame is possible.
  • the slide is pushed backwards so that notch 20 of the slide is at the same position as notch 21 of the frame.
  • the piston is introduced partially into the cylinder 5 and thereafter the whole is introduced into the slide.
  • the spring 7 is now introduced into the slide and applied around the piston 6 and at least partially around the cylinder 5.
  • the bushing 14 is now introduced into the slide in order to lock the barrel and the piston.
  • the projectile When the fire weapon is charged, a projectile is extracted from the loader and lodged into the chamber 8.
  • the projectile comprises a cartridge-case and a bullet 11.
  • the head of the bullet 11 lodged into the chamber 8 is situated preferably at the level at which the flaw issues forth into the chamber as is illustrated in figure 2.
  • this is only a preferential embodiment and that other embodiments are also suitable. So it is also possible that there is a small distance between the head of the bullet and the place at which the flaw issues forth into the chamber.
  • the cartridge-case of the projectile may not obstruct the flaw as will become clear from the description given here after.
  • the explosion of the gun-powder will cause the bullet to leave the cartridge-case by applying a pressure on the backside of the bullet.
  • the bullet which leaves the cartridge-case will first, during a short period of time obturate the flaw so that all the pressure of the gas generated by the explosion of the gun-powder is used for pushing and accelerating the bullet. Due to the explosion force, the cartridge-case will expand somewhat and stick temporarily to the chamber, which causes a pulling force generated by the explosion of the gun-powder to be applied on the bullet. That pulling force on its turn accelerates the bullet moving into the barrel, the slide 3 is blocked by the barrel 4 which on its turn is rigidly locked with the frame.
  • the movement of the piston in the cylinder will also compress the residual gas in the cylinder.
  • the compressed gas can not quickly escape into the barrel and will thus cause an opposite force, reducing the speed of the piston moving into the cylinder.
  • the flaw issues forth at the end of the cylinder the residual gas is forced to escape through the flaw and the piston exerts its compression action on the residual gas over the whole stroke of the cylinder.
  • the speed reduction imposed on the piston by the compression of the gas will be transferred to the slide which, as already mentioned is rigidly locked to the slide.
  • An additional advantage of a piston-cylinder system according to the invention is that due the fact that the piston has a stroke which is substantially equal to the length of the cylinder and that the flow issues forth at the end of the cylinder, the piston has to travel over the whole length of the cylinder, thereby cleaning the inner wall of the cylinder.
  • Projectiles comprising lead can thus easily be used in a fire weapon according to the invention, because an eventual lead deposit on the inner wall of the cylinder will be cleaned by the movement of the piston.
  • the inner wall of the cylinder is thus always kept clean which is advantageous for the maintenance of the weapon and extends its lifetime.
  • the piston is preferably provided with one or more ring-grooves 13.
  • the ring-­grooves create turbulences which improve the cleaning action and they form as is to say a scraping-tool which scrapes the inner wall of the cylinder.
  • the ring-grooves 13 can have different shapes, they can be simply cylindrical or have slightly conical walls. The number of ring-grooves is determined by the length of the piston, for example when the piston has a length of 3,5 cm there are seven ring-grooves.
  • the outer wall of the cylinder is preferably provided with ring-grooves which improve the cooling of the cylinder.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
EP89201234A 1988-11-03 1989-05-17 Arme à feu Withdrawn EP0367308A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE8801258 1988-11-03
BE8801258 1988-11-03

Publications (1)

Publication Number Publication Date
EP0367308A1 true EP0367308A1 (fr) 1990-05-09

Family

ID=3883708

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89201234A Withdrawn EP0367308A1 (fr) 1988-11-03 1989-05-17 Arme à feu

Country Status (1)

Country Link
EP (1) EP0367308A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995016178A1 (fr) * 1993-12-09 1995-06-15 Bernard Christian Besselink Mecanisme de verrouillage d'une arme a feu
WO1996037747A1 (fr) * 1995-05-26 1996-11-28 Bernard Christian Besselink Systeme de verrouillage pour arme a feu

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT315678B (de) * 1969-10-08 1974-06-10 Colt Ind Operating Corp Pistole
US4388855A (en) * 1980-10-06 1983-06-21 Sokolovsky Paul J Firearm pneumatic slide decelerator assembly
CH663275A5 (de) * 1984-07-10 1987-11-30 Haemmerli Ag Faustfeuerwaffe.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT315678B (de) * 1969-10-08 1974-06-10 Colt Ind Operating Corp Pistole
US4388855A (en) * 1980-10-06 1983-06-21 Sokolovsky Paul J Firearm pneumatic slide decelerator assembly
CH663275A5 (de) * 1984-07-10 1987-11-30 Haemmerli Ag Faustfeuerwaffe.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995016178A1 (fr) * 1993-12-09 1995-06-15 Bernard Christian Besselink Mecanisme de verrouillage d'une arme a feu
WO1996037747A1 (fr) * 1995-05-26 1996-11-28 Bernard Christian Besselink Systeme de verrouillage pour arme a feu

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Effective date: 19901110