EP0359946B1 - Geschoss für Druckluftgewehre mit gezogenem Lauf - Google Patents

Geschoss für Druckluftgewehre mit gezogenem Lauf Download PDF

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Publication number
EP0359946B1
EP0359946B1 EP19890113768 EP89113768A EP0359946B1 EP 0359946 B1 EP0359946 B1 EP 0359946B1 EP 19890113768 EP19890113768 EP 19890113768 EP 89113768 A EP89113768 A EP 89113768A EP 0359946 B1 EP0359946 B1 EP 0359946B1
Authority
EP
European Patent Office
Prior art keywords
projectile
teeth
cylindrical portion
end side
helical
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
EP19890113768
Other languages
English (en)
French (fr)
Other versions
EP0359946A1 (de
Inventor
Ugo Vereni
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.)
Jolly Di Vadala Lucia Vereni
Original Assignee
Jolly Di Vadala Lucia Vereni
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 Jolly Di Vadala Lucia Vereni filed Critical Jolly Di Vadala Lucia Vereni
Publication of EP0359946A1 publication Critical patent/EP0359946A1/de
Application granted granted Critical
Publication of EP0359946B1 publication Critical patent/EP0359946B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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 a projectile for compressed air carbines having their barrel provided with internal helical riflings, according to the precharacterizing part of claim 1.
  • a projectile of this type is known from the document GB-A-1.524.743.
  • a projectile for use in air guns comprising a cylindrical body with a conical forepart and with four equispaced longituninal ribs having a part-circular shape in cross-section, and extending over a length of the cylindrical body.
  • a projectile also comprising a cylindrical body, however with an ogival forepart and with a plurality of equispaced helical ribs having a rectangular outline in cross-section.
  • the projectile known from the document US-A-910.935 also has a cylindrical body and an ogival forepart, but is formed, in lieu of the ribs, with a plurality of equispaced helical grooves having a rectangular profile, so that the teeth between the grooves have a radially outwardly flaring trapezoidal shape in cross-section.
  • a projectile for shot guns having a conical forward end and a cylindrical body provided with a plurality of equispaced, slightly helical longitudinal grooves or recesses being part-circular in cross-section, so that teeth or vanes are formed therebetween, the said teeth or vanes having concave sides, and being substantially parallel to each other at the free ends thereof.
  • the outward teeth on the projectile body extend over almost the whole length, or over an important section of the length of the projectile body.
  • the invention aims to improve the projectile according to the preamble of claim 1, which is like the projectile known from the document GB-A-1524743, in such a manner that the projectile is imparted a rotatory axial motion that determines a high firing velocity of the same and a considerable precision in the projectile forward motion, and to improve at the same time the aerodynamic properties and so the velocity of the projectile and the capability of the projectile of maintaining the direction thereof.
  • the projectile according to the invention is made from only one piece of lead or a lead alloy, or from any other suitable material (see hereinafter), and is obtained by any suitable known art.
  • reference A denotes the projectile front section, substantially comprising a conical portion 1 and a cylindrical portion 2, which are connected to each other by an enlarged downwardly flaring small portion 3 being interposed therebetween.
  • the diameter of portion 2 is suitably greater than the base diameter of portion 3.
  • a portion 4 in form of an upturned truncated cone extends from the lower end side of portion 2.
  • Reference B denotes the rear section of the projectile, which comprises a truncated cone-shaped portion 5 and a cylindrical end collar 6.
  • the said portions 1, 2, 3, 4, 5, and 6 are set in a perfectly coaxial relation.
  • One of the differentiating features of the projectile according to the invention relative to the known projectiles is the provision of at least one ring of equispaced teeth 7 at portion 2 of the projectile front section, and the said teeth 7 are characterized by such a typical profile that the same can be screwed into the internal helical riflings in a carbine barrel, whereby the projectile will be ejected from the carbine by being imparted a rotatory axial motion that improves the penetration of the projectile and the capability of the projectile of maintaining the laying direction thereof.
  • the dimensions and the spacing apart from each other of the teeth 7 depend on the characteristic dimensions and on the shape of the internal riflings in the carbine barrel, so that these parameters will be not disclosed in detail in the following.
  • the teeth 7 are parallel to the axis of the projectile, and preferably have a substantially trapezoidal profile, with their surface 107 being suitably rounded. It is however understood that the profile of said teeth 7 may be widely modified.
  • the teeth 7 may be suitably inclined, as in the example shown in Figure 2.
  • the inclination of said teeth is preferably limited to a not too high value.
  • more than one toothed ring set in a spaced apart relation by respective annular recesses may be provided at the projectile portion 2, and the teeth of one ring may be trued with the teeth of the adjoining toothed ring, or these teeth may be suitably offset, so that a function which is equivalent to the function of the inclined teeth shown in Figure 2, will be attained as a whole.
  • the projectile may be provided in combination with, or as an alternative to the toothed ring or rings at the projectile front portion 2, with at least one ring of teeth 8 arranged close to, and directly upstream of the cylindrical rear end collar 6, this still for allowing the projectile to be screwed into the riflings of a carbine barrel.
  • a collar like the collar 6 may be provided also upstream of the toothed ring 8.
  • the surface of the truncated cone-shaped rear portion 5 of the projectile according to the invention is provided with a plurality of helical grooves 105 which are preferably inclined by 45°, and are directed in the same sense as the barrel riflings, so that the aerodynamic properties and so the velocity of the projectile, and the capability of the projectile of maintaining the direction thereof will be improved.
  • the projectile may be covered with any suitable metallic or non-metallic material, and this in order to isolate the lead material of the projectile and prevent the hands of a user from touching it, and in order to decrease the projectile sliding friction on the carbine barrel, and to improve the successive penetration into air of the projectile, and to improve as well, if a particularly hard covering material has been used, the penetration of the projectile into the target.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Powder Metallurgy (AREA)

Claims (7)

  1. Ein Geschoß für Druckluftgewehre mit inneren Spiralzügen, bestehend aus:
    a) einem konischen Vorderteil (1), dessen Scheitelpunkt vorwärts gerichtet ist;
    b) einem abgestumpften, kegelförmigen Zwischenteil (4), dessen Seite mit dem kleinen Ende rückwärts gedreht ist;
    c) einem abgestumpften, kegelförmigen, hinteren Teil (5), dessen Seite mit dem großen Ende rückwärts gedreht ist, und dessen Seite mit dem kleinen vorderen Ende denselben Durchmesser hat wie die Seite mit dem kleinen hinteren Ende des Zwischenteils (4) und damit verbunden ist, durch die Kombination der folgenden Merkmale gekennzeichnet:
    d) ein zylindrischer Teil (2) mit einem Ring aus äquidistanten, gleichen Zähnen (7) ist zwischen dem Vorderteil (1) und dem Zwischenteil (4) und/oder an der Seite mit dem großen rückwärtigen Ende des hinteren Teils (5) vorgesehen;
    e) die Zähne (7) auf dem zylindrischen Teil (2) haben eine kegelige Form mit ebenen Seiterwänden;
    f) die freien Ende (107) der Zähne (7) ragen radial soweit heraus, daß sie in die Spiralzüge des Gewehrlaufs hineingeschraubt werden;
    g) die Oberfläche des hinteren Teils (5) ist mit äquidistanten, gleichen Spiralnuten (105) versehen;
  2. Das Geschoß nach Anspruch 1, dadurch gekennzeichnet, daß die Sriralnuten (105) im hinteren Teil (5) dieselbe Schraubrichtung haben wie die Spiralzüge in dem Gewehrlauf.
  3. Das Geschoß nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Zähne (7) auf dem zylindrischen Teil (2) parallel zur Achse des Geschosses liegen.
  4. Das Geschoß nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Zähne (7) auf dem zylindrischen Teil (2) mit Bezug zur Achse des Geschosses schräggestellt sind.
  5. Das Geschoß nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Zähne (7) auf dem zylindrischen Teil (2) ein im wesentlichen trapezförmiges Profil haben.
  6. Das Geschoß nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das konische Vorderteil (1) über einen sich nach hinten erweiternden, abgestumpften, kegelförmigen, kleinen Teil (3) mit dem gezahnten zylindrischen Teil (2) verbunden ist.
  7. Das Geschoß nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das Geschoß aus Blei oder aus einer Bleilegierung hergestellt und mit einem metallischen oder nichtmetallischen Material, insbesondere einem harten Material, überzogen ist.
EP19890113768 1988-08-18 1989-07-26 Geschoss für Druckluftgewehre mit gezogenem Lauf Expired - Lifetime EP0359946B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1515488U IT215784Z2 (it) 1988-08-18 1988-08-18 Proiettile particolarmente per carabine ad aria compressa e del tipo a canna rigata
IT1515488U 1988-08-18

Publications (2)

Publication Number Publication Date
EP0359946A1 EP0359946A1 (de) 1990-03-28
EP0359946B1 true EP0359946B1 (de) 1993-02-10

Family

ID=11146776

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890113768 Expired - Lifetime EP0359946B1 (de) 1988-08-18 1989-07-26 Geschoss für Druckluftgewehre mit gezogenem Lauf

Country Status (3)

Country Link
EP (1) EP0359946B1 (de)
DE (1) DE68904848D1 (de)
IT (1) IT215784Z2 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6526893B2 (en) * 2000-01-31 2003-03-04 Thomas R. May Polymer ballistic tip pellets
AU2014234957B2 (en) * 2013-03-19 2017-06-29 Fergus William Siewertsz Van Reesema Projectile with rotational motion
US20150204639A1 (en) * 2014-01-20 2015-07-23 Gamo Outdoor Usa, Inc. Pellet for air guns

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US910935A (en) * 1909-01-26 Percy b
DE306406C (de) *
GB190219297A (en) * 1902-09-03 1903-06-18 Alfred Cox Improvements in Bullets or Pellets for Air Guns
FR897515A (fr) * 1943-08-25 1945-03-23 Pyrotechnische Fabriken Gmbh D Projectile
CA985954A (en) * 1974-03-07 1976-03-23 Joseph F.L.J. Pichard Projectiles for air arms
US4063511A (en) * 1976-07-21 1977-12-20 Bullard James M Spinning shot gun projectile

Also Published As

Publication number Publication date
EP0359946A1 (de) 1990-03-28
IT215784Z2 (it) 1990-11-07
DE68904848D1 (de) 1993-03-25
IT8815154V0 (it) 1988-08-18

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