EP0281592B1 - Semi automatic loading system for a gun - Google Patents

Semi automatic loading system for a gun Download PDF

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Publication number
EP0281592B1
EP0281592B1 EP87905750A EP87905750A EP0281592B1 EP 0281592 B1 EP0281592 B1 EP 0281592B1 EP 87905750 A EP87905750 A EP 87905750A EP 87905750 A EP87905750 A EP 87905750A EP 0281592 B1 EP0281592 B1 EP 0281592B1
Authority
EP
European Patent Office
Prior art keywords
cylindrical case
weapon
case portion
cartridge
loading
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
Application number
EP87905750A
Other languages
German (de)
French (fr)
Other versions
EP0281592A1 (en
Inventor
Robert Eric Short
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT87905750T priority Critical patent/ATE75030T1/en
Publication of EP0281592A1 publication Critical patent/EP0281592A1/en
Application granted granted Critical
Publication of EP0281592B1 publication Critical patent/EP0281592B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B11/00—Compressed-gas guns, e.g. air guns; Steam guns
    • F41B11/50—Magazines for compressed-gas guns; Arrangements for feeding or loading projectiles from magazines
    • F41B11/55—Magazines for compressed-gas guns; Arrangements for feeding or loading projectiles from magazines the projectiles being stored in stacked order in a removable box magazine, rack or tubular magazine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B11/00—Compressed-gas guns, e.g. air guns; Steam guns
    • F41B11/60—Compressed-gas guns, e.g. air guns; Steam guns characterised by the supply of compressed gas
    • F41B11/64—Compressed-gas guns, e.g. air guns; Steam guns characterised by the supply of compressed gas having a piston effecting a compressor stroke during the firing of each shot
    • F41B11/642—Compressed-gas guns, e.g. air guns; Steam guns characterised by the supply of compressed gas having a piston effecting a compressor stroke during the firing of each shot the piston being spring operated
    • F41B11/643—Compressed-gas guns, e.g. air guns; Steam guns characterised by the supply of compressed gas having a piston effecting a compressor stroke during the firing of each shot the piston being spring operated the piston being arranged concentrically with the barrel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B6/00—Projectiles or missiles specially adapted for projection without use of explosive or combustible propellant charge, e.g. for blow guns, bows or crossbows, hand-held spring or air guns
    • F42B6/10—Air gun pellets ; Ammunition for air guns, e.g. propellant-gas containers

Definitions

  • the invention relates to an air rifle, pistol or similar weapon, comprising a breech, a barrel, a cylindrical housing connected to said breech opposite said barrel, a magazine holder, an ejector chamber, a ejector means and a loading and pressure outlet tube by which, when loading said weapon, a cartridge is brought into such a position that when firing the weapon the pressurized medium, via the outlet tube, is brought into contact with a cylindrical case portion of said cartridge and a pellet connected to said cylindrical case portion will be moved through the barrel outwardly the ejector means ejecting a used cylindrical case portion on completion of the next loading cycle.
  • Such an air rifle is known from US-A-3,111,121.
  • a cartridge is completely brought into the cylindrical casing between the barrel and the breech.
  • the cartridge is formed by a cylindrical case portion to which a pellet or bullet head is connected having a rear open end and a hemi-spherical closed front end. This pellet being made of plastic.
  • the pressure outlet tube is pressed against the rear wall of the cylindrical case portion of the cartridge so that only a limited sealing between said outlet tube and the cartridge will be obtained during firing the weapon when the pressurized medium has to be brought from the pressure outlet tube into the cylindrical case portion for moving the bullet head through the barrel outwardly.
  • an air rifle, piston or similar weapon is characterized in that said pellet is contained inside said cylindrical case portion of said cartridge, said cylindrical case portion surrounding the loading and pressure outlet tube after the pellet is moved out of said cylindrical case portion into the barrel when loading the weapon, said cylindrical case portion acting as a pressure seal during discharge of the weapon.
  • the pellet is having another shape and can be made from metal, such as lead.
  • said pellet can be pressed out of the cylindrical case portion of the cartridge and can be brought into the cylindrical casing being connected to the barrel without distortion of the pellet.
  • the cylindrical case portion of the cartridge functions as an air seal and said cylindrical case portion is ejected during the next loading cycle.
  • the compression cylinder is held in the position in which the pressure outlet tube is positioned in the cylindrical case portion of a cartridge after loading of the weapon by either a pressure spring or a locking catch activated by the cocking arm at the breech.
  • the cartridges are contained in an exchangeable, spring-pressured magazine, said cartridges being brought into the loading position one after the other.
  • the compression cylinder is provided with an ejection chamber cover plate formed by a partly circular element extending from the end of the compression cylinder and protruding into the breech directly above the ejection chamber during a loading position of thy weapon, an opening being present in the cover plate between the compression cylinder and the breech to assure that an empty cylindrical case portion is ejected when the weapon is loaded.
  • the invention relates also to a cartridge for a weapon as described above, said cartridge being characterized in that a conventional diabolo or other form of pellet is completely contained within a cylindrical case portion.
  • cylindrical case portion of the cartridge is tapered outwards from the inner bore to allow smooth entry of the pressure outlet tube into it.
  • said cylindrical case portion is provided with an inner circular groove.
  • the weapon comprises a cylindrical housing 1, the fore end of which is attached to the breech 13 in which a barrel 2 is fitted, the rear end of said housing 1 being attached to a - not shown - screw-on-block containing a trigger mechanism.
  • an air compression system is positioned comprising a sliding compression tube 4 in which a spring tension operated piston 5 is contained, which in Fig. 1 is shown in the position after firing the weapon.
  • the breech 13 containing the barrel 2 is machined vertically to provide a channel 20, see Fig. 3, in which a magazine 15 may fit.
  • another channel 28 is machined, said channel being provided with a downward slope 10. This is the exit channel from the ejector chamber 25, see Fig. 4.
  • a tube 11 is attached, this being the air outlet tube and having the same diameter as the bore 3 of the barrel 2 and being long enough to pass from the rear of the breech 13 into the barrel 2, see Fig. 1.
  • the center bore of the tube 11 passes into the compression cylinder allowing air to be forced directly into the barrel from the cylinder when the weapon is fired.
  • a rectangular housing 12 is made to allow the magazine 15 to pass through it and into the breech.
  • a securing catch 14 the magazine is held in its place.
  • the catch is rotatably mounted on a pin 16 and is spring loaded.
  • the cartridges 19, see Fig. 2 comprise a cylindrical case portion 22 having a wall thickness of approximately 12 micrometers with a bore of 5,6 mm and with a length approximately 1,5 cm, being longer than the pellet 21 with e.g. a length of 1 cm and a diameter of 8 mm.
  • the wall is tapered outward to allow the pressure tube 11 to pass into it.
  • inner circular groove 23 is formed in the inner wall.
  • both the compression cylinder 4 and the piston 5, connected to the rod 6 are pulled to the right,as seen in Fig. 1, by means of the side mounted cocking lever.
  • the pressure outlet tube 11 is moved to the right also and at the same time a cartridge 19 by means of the spring 17 forces an empty cylindrical case 22 into the ejector chamber 25.
  • the cartridge which has to be used is held in position by the pressure of the spring 17 from below and by the underside of the empty cylindrical case 22 from above.
  • the piston 5 is engaged by the trigger unit and is held in that position.
  • An ejector chamber cover plate 27 is also attached to the compression cylinder 4 to hold the empty cylindrical case 22 in the chamber 25 until the pressure outlet tube 11 has passed into the next cylindrical case portion 22, at which moment the ejector chamber 25 is opened and the empty cylindrical case 22 is ejected.
  • Said ejection is provided by a projecting portion 26, see Fig. 4, mounted to the partly circular plate 27 having a diameter corresponding to the width of the channel 20, said plate 27 being an elongation of the compression tube 4 and having an opening 27a which, during re-loading of the weapon, that means when the pressure outlet tube 11 is brought into a cartridge, is coming to lie beside the ejector chamber 25 so that the cylindrical case portion may leave said ejector chamber.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

Semi automatic loading system for spring, gas or compressed air weapons with individually diabolo pellets, said system comprising a small cylindrical plastic case (22) in which a diabolo or other form of pellet is inserted, said pellet (21) case (22) being used as an air seal and being ejected during the loading cycle. An internal rim (30) within the case ensures that the pellet is held firmly and cannot fall out or foul the mechanism. A number of said cases can be inserted in a magazine (15).

Description

  • The invention relates to an air rifle, pistol or similar weapon, comprising a breech, a barrel, a cylindrical housing connected to said breech opposite said barrel, a magazine holder, an ejector chamber, a ejector means and a loading and pressure outlet tube by which, when loading said weapon, a cartridge is brought into such a position that when firing the weapon the pressurized medium, via the outlet tube, is brought into contact with a cylindrical case portion of said cartridge and a pellet connected to said cylindrical case portion will be moved through the barrel outwardly the ejector means ejecting a used cylindrical case portion on completion of the next loading cycle.
  • Such an air rifle is known from US-A-3,111,121. In case of this known rifle a cartridge is completely brought into the cylindrical casing between the barrel and the breech. The cartridge is formed by a cylindrical case portion to which a pellet or bullet head is connected having a rear open end and a hemi-spherical closed front end. This pellet being made of plastic. In the loaded position the pressure outlet tube is pressed against the rear wall of the cylindrical case portion of the cartridge so that only a limited sealing between said outlet tube and the cartridge will be obtained during firing the weapon when the pressurized medium has to be brought from the pressure outlet tube into the cylindrical case portion for moving the bullet head through the barrel outwardly.
  • Obviously such a weapon and cartridge is only suitable to be used as a toy air rifle, as indicated in said patent.
  • Now the object of the invention is to eliminate the disadvantages of the weapon described above. According to the invention an air rifle, piston or similar weapon is characterized in that said pellet is contained inside said cylindrical case portion of said cartridge, said cylindrical case portion surrounding the loading and pressure outlet tube after the pellet is moved out of said cylindrical case portion into the barrel when loading the weapon, said cylindrical case portion acting as a pressure seal during discharge of the weapon.
  • By this it is possible that the pellet is having another shape and can be made from metal, such as lead. During the loading of the weapon said pellet can be pressed out of the cylindrical case portion of the cartridge and can be brought into the cylindrical casing being connected to the barrel without distortion of the pellet. When this is done the cylindrical case portion of the cartridge functions as an air seal and said cylindrical case portion is ejected during the next loading cycle.
  • According to a further embodiment the compression cylinder is held in the position in which the pressure outlet tube is positioned in the cylindrical case portion of a cartridge after loading of the weapon by either a pressure spring or a locking catch activated by the cocking arm at the breech.
  • According to the invention the cartridges are contained in an exchangeable, spring-pressured magazine, said cartridges being brought into the loading position one after the other.
  • According to a preferred embodiment the compression cylinder is provided with an ejection chamber cover plate formed by a partly circular element extending from the end of the compression cylinder and protruding into the breech directly above the ejection chamber during a loading position of thy weapon, an opening being present in the cover plate between the compression cylinder and the breech to assure that an empty cylindrical case portion is ejected when the weapon is loaded.
  • The invention relates also to a cartridge for a weapon as described above, said cartridge being characterized in that a conventional diabolo or other form of pellet is completely contained within a cylindrical case portion.
  • According to a preferred embodiment the cylindrical case portion of the cartridge is tapered outwards from the inner bore to allow smooth entry of the pressure outlet tube into it. For obtaining a good sealing between the pressure outlet tube and the cylindrical case portion of a cartridge it will be provided that said cylindrical case portion is provided with an inner circular groove.
  • The invention will be described by means of the drawings, in which:
    • Fig. 1 shows a shortened longitudinal section of an air rifle according to the invention;
    • Fig. 2 shows a longitudinal section of a cartridge according to the invention, on enlarged scale;
    • Fig. 3 shows a detail of the ejector indicated in fig. 1; and
    • Fig. 4 shows a detail of the ejector chamber.
  • According to the drawing the weapon comprises a cylindrical housing 1, the fore end of which is attached to the breech 13 in which a barrel 2 is fitted, the rear end of said housing 1 being attached to a - not shown - screw-on-block containing a trigger mechanism. Within the housing 1 an air compression system is positioned comprising a sliding compression tube 4 in which a spring tension operated piston 5 is contained, which in Fig. 1 is shown in the position after firing the weapon. The breech 13 containing the barrel 2 is machined vertically to provide a channel 20, see Fig. 3, in which a magazine 15 may fit. Above said first channel 20 another channel 28 is machined, said channel being provided with a downward slope 10. This is the exit channel from the ejector chamber 25, see Fig. 4.
  • At the front end portion 4A of the compression cylinder 4 a tube 11 is attached, this being the air outlet tube and having the same diameter as the bore 3 of the barrel 2 and being long enough to pass from the rear of the breech 13 into the barrel 2, see Fig. 1. The center bore of the tube 11 passes into the compression cylinder allowing air to be forced directly into the barrel from the cylinder when the weapon is fired.
  • Attached to the underside of the breech 13, directly below and surrounding the magazine channel 20, a rectangular housing 12 is made to allow the magazine 15 to pass through it and into the breech. By means of a securing catch 14 the magazine is held in its place. The catch is rotatably mounted on a pin 16 and is spring loaded.
  • The cartridges 19, see Fig. 2, comprise a cylindrical case portion 22 having a wall thickness of approximately 12 micrometers with a bore of 5,6 mm and with a length approximately 1,5 cm, being longer than the pellet 21 with e.g. a length of 1 cm and a diameter of 8 mm. At the rear 30 of the bore the wall is tapered outward to allow the pressure tube 11 to pass into it. On the inside, where the taper begins, and inner circular groove 23 is formed in the inner wall. When the pellet 21 is inserted into the cylindrical case portion 22 the skirt of the pellet is received into said groove 23 and prevents the pellet from moving. The cylindrical cases 22 are inserted into a spring pressured magazine 15 as with a conventional fire arm. The spring 17 and the feed shoe 18 in the magazine 14 are held in the compressed position by a catch, not shown, on the magazine casing until insertion into the weapon, so that then the pellets can be forced by said spring 17 into the breech 13.
  • During the loading procedure both the compression cylinder 4 and the piston 5, connected to the rod 6 are pulled to the right,as seen in Fig. 1, by means of the side mounted cocking lever. The pressure outlet tube 11 is moved to the right also and at the same time a cartridge 19 by means of the spring 17 forces an empty cylindrical case 22 into the ejector chamber 25. The cartridge which has to be used is held in position by the pressure of the spring 17 from below and by the underside of the empty cylindrical case 22 from above. At the end of the rearward travel the piston 5 is engaged by the trigger unit and is held in that position. By moving the cocking lever to its forward position the compression cylinder 4 is moved forward to rest against the rear of the breech 13 and the pressure outlet tube 11 passes through the breech and enters into the cylindrical case 22 of the cartridge 19 and forces the pellet 21 into the barrel 2. The cylindrical case portion 22 is retained around the pressure outlet tube 11 such that it is sealed around said outlet tube and the front of it is forced against the barrel 2.
  • An ejector chamber cover plate 27 is also attached to the compression cylinder 4 to hold the empty cylindrical case 22 in the chamber 25 until the pressure outlet tube 11 has passed into the next cylindrical case portion 22, at which moment the ejector chamber 25 is opened and the empty cylindrical case 22 is ejected.
  • Said ejection is provided by a projecting portion 26, see Fig. 4, mounted to the partly circular plate 27 having a diameter corresponding to the width of the channel 20, said plate 27 being an elongation of the compression tube 4 and having an opening 27a which, during re-loading of the weapon, that means when the pressure outlet tube 11 is brought into a cartridge, is coming to lie beside the ejector chamber 25 so that the cylindrical case portion may leave said ejector chamber.
  • When firing the weapon piston 5 is moved by means of the spring 7 to the position indicated in Fig. 1. By means of the air, compressed by the piston 5 the pellet 21 is moved through the barrel 2. When reloading the weapon the piston 5 is moved back again and the spring 7 is tensioned. The compression tube 4 is moved over a limited distance only such that the pressure outlet tube 11 of it is removed out of the empty cylindrical case portion 22 so that this is moved by the next cartridge into the ejector chamber 25 which is closed at that moment. Then the compression tube 4 is moved forward again so that the pressure outlet tube 11 of it is moved into a new cartridge and during this movement the ejector chamber 25 is opened for removal of the empty cylindrical case portion. To maintain the pressure outlet tube 11 in the position shown in Fig. 1 during firing the weapon it is possible to mount a spring 9 between the end of the compression tube 4 and a shoulder 8 in the housing 1.

Claims (7)

1. Air rifle, pistol or similar weapon, comprising a breech (13), a barrel (2), a cylindrical housing (1) connected to said breech (13) opposite said barrel (2), a magazine holder (12), an ejector chamber (25), an ejector means (26) and a loading and pressure outlet tube (4,11) by which, when loading said weapon, a cartridge (19) is brought into such a position that when firing the weapon the pressurized medium, via the outlet tube (11), is brought into contact with a cylindrical case portion (22) of said cartridge (19) and a pellet (21) connected to said cylindrical case portion (22) will be moved through the barrel (2 ) outwardly the ejector means (26) ejecting a used cylindrical case portion (22) on completion of the next loading cycle,
characterised in
that said pellet (21) is contaied inside said cylindrical case portion (22) of said cartridge (19), said cylindrical case portion (22) surrounding the loading and pressure outlet tube (11) after the pellet (21) is moved from said cylindrical case portion (22) into barrel (2) when loading the weapon, said cylindrical case portion (22) acting as a pressure seal during discharge of the weapon.
2. Weapon according to claim 2,
characterized in
that the compression cylinder (4) is held in the position in which the pressure outlet tube (11) is positioned in the cylindrical case portion (22) of a cartridge (19) after loading of the weapon by either a pressure spring (9) or a locking catch activated by the cocking arm at the breech (13).
3. Weapon according to claim 1 or 2,
characterized in
that the cartridges (19) are contained in an exchangeable, spring-pressured magazine (15), said cartridges (19) being brought into the loading position one after the other.
4. Weapon according to one of the preceding claims,
characterized in
that the compression cylinder (4) is provided with an ejection chamber (25) cover plate (27) formed by a partly circular element extending from the end of the compression cylinder (4) and protruding into the breech (13) directly above the ejection chamber (25) during a loading position of the weapon, an opening (27a) being present in the cover plate between the compression cylinder (4) and the breech (13) to assure that an empty cylindrical case portion (22) is ejected when the weapon is loaded.
5. Cartridge for a weapon according to one of the preceding claims,
characterized in
that a conventional diabolo or other form of pellet (21) is completely contained within a cylindrical case portion (22).
6. Cartridge according to claim 5,
characterized in
that the cylindrical case portion (22) is tapered outwards from the inner bore to allow smooth entry of the pressure outlet tube (11) into it.
7. Cartridge according to claim 5 or 6,
characterized in
that the cylindrical case portion (22) is provided with an inner circular groove (23).
EP87905750A 1986-09-08 1987-09-07 Semi automatic loading system for a gun Expired - Lifetime EP0281592B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87905750T ATE75030T1 (en) 1986-09-08 1987-09-07 SEMI-AUTOMATIC LOADER FOR A PISTOL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8602257 1986-09-08
NL8602257A NL8602257A (en) 1986-09-08 1986-09-08 GAS PRESSURE WEAPONS, SUCH AS A WINDBUG, AIR GUN AND THE LIKE, WITH A SEMI-AUTOMATIC CHARGING MECHANISM FOR CARTRIDGES, ALSO A CARTRIDGE INTENDED FOR SUCH GAS PRESSURE WEAPONS.

Publications (2)

Publication Number Publication Date
EP0281592A1 EP0281592A1 (en) 1988-09-14
EP0281592B1 true EP0281592B1 (en) 1992-04-15

Family

ID=19848512

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87905750A Expired - Lifetime EP0281592B1 (en) 1986-09-08 1987-09-07 Semi automatic loading system for a gun

Country Status (4)

Country Link
EP (1) EP0281592B1 (en)
DE (1) DE3778345D1 (en)
NL (1) NL8602257A (en)
WO (1) WO1988002094A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4208416A1 (en) * 1992-03-16 1993-09-23 Mayer Grammelspach Dianawerk GAS PRESSURE ARMS
US6564789B1 (en) * 2001-11-29 2003-05-20 Shih-Che Hu BB bullet feeding device of toy gun

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE42091C (en) * EISENWERKE GAGGENAU, FLÜRSCHEIM & BERGMANN in Gaggenau, Baden Repetir air rifle
DE568738C (en) * 1931-07-26 1933-01-23 Ulrich Boecker Air rifle
FR1122368A (en) * 1955-02-22 1956-09-05 Advanced pneumatic weapon
US3111121A (en) * 1961-01-26 1963-11-19 Ideal Toy Corp Toy air rifle
US3552372A (en) * 1968-04-26 1971-01-05 James W Wilkerson Toy air rifle with ejection of spent casing
GB1354307A (en) * 1971-06-17 1974-06-05 Sgl Ind Inc Device for launching a projectile
JPS4915545A (en) * 1972-05-31 1974-02-12
DE3040924C2 (en) * 1980-10-30 1985-11-21 Mayer & Grammelspacher Dianawerk, 7550 Rastatt Compressed air weapon with a bullet magazine

Also Published As

Publication number Publication date
NL8602257A (en) 1988-04-05
WO1988002094A3 (en) 1988-06-16
EP0281592A1 (en) 1988-09-14
WO1988002094A2 (en) 1988-03-24
DE3778345D1 (en) 1992-05-21

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