EP2028433A1 - Anti-rotation extractor for shotgun, and related shotgun - Google Patents

Anti-rotation extractor for shotgun, and related shotgun Download PDF

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Publication number
EP2028433A1
EP2028433A1 EP08104845A EP08104845A EP2028433A1 EP 2028433 A1 EP2028433 A1 EP 2028433A1 EP 08104845 A EP08104845 A EP 08104845A EP 08104845 A EP08104845 A EP 08104845A EP 2028433 A1 EP2028433 A1 EP 2028433A1
Authority
EP
European Patent Office
Prior art keywords
extractor
shank
housing
shotgun
regard
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Withdrawn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
EP08104845A
Other languages
German (de)
English (en)
French (fr)
Inventor
Giordano Belleri
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.)
Fausti Stefano Srl
Original Assignee
Fausti Stefano Srl
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 Fausti Stefano Srl filed Critical Fausti Stefano Srl
Publication of EP2028433A1 publication Critical patent/EP2028433A1/en
Withdrawn legal-status Critical Current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
    • F41A15/00—Cartridge extractors, i.e. devices for pulling cartridges or cartridge cases at least partially out of the cartridge chamber; Cartridge ejectors, i.e. devices for throwing the extracted cartridges or cartridge cases free of the gun
    • F41A15/06—Cartridge extractors, i.e. devices for pulling cartridges or cartridge cases at least partially out of the cartridge chamber; Cartridge ejectors, i.e. devices for throwing the extracted cartridges or cartridge cases free of the gun for breakdown guns

Definitions

  • This invention concerns an extractor for shotguns, in particular break-action shotguns, and a related shotgun.
  • Extractors of a well known type consist of a head, set in the receiver, which accommodates an arc of the cartridge base, and a receiver shank guided in a special housing.
  • State of the art extractors consist of a cylindrical shank set in a cylindrical housing of the breech and a pin connected to the head, in an offset position with regard to the shank and the cylindrical housing, in such a way as to engage in a corresponding hole in the breech.
  • the shank has the function of guiding the translation motion of the extractor along an axial direction and the pin has the function of preventing rotation of the extractor with regard to the said axial direction.
  • the subject-matter of this invention is an extractor and related shotgun intended to eliminate the drawbacks mentioned above in connection with current technique.
  • figure 1 shows a perspective view of an extractor in accordance with a form of this invention
  • figure 3 shows a plan view of the extractor in figure 1 , from the side of arrow III in figure 1 ;
  • FIGS. 5a-5f show sectional views of the extractor along the plane of section V-V in figure 3 , in accordance with possible variants in the implementation of this invention.
  • figure 6 shows a perspective view of a shotgun component suitable for housing an extractor in accordance with this invention
  • figure 7 shows a perspective view of a shotgun component fitted with an extractor in accordance with this invention.
  • 4 globally indicates an extractor for shotguns suitable for ejecting a cartridge case from shotgun 8.
  • Extractor 4 consists of a shank 12 such as to run axially along axial direction X-X within housing 16 set in breech 20 of shotgun 24.
  • At least one portion of restraint 40 of shank 12 has a transversal section, with regard to a plane of section perpendicular to said axial direction X-X, with non-circular geometry in such a way as to achieve, with housing 16 of shotgun 24, at least partially counterprofiled with regard to the said portion of restraint 40 of shank 12, a prismatic type coupling.
  • shank 12 in correspondence to portion of restraint 40, is non-circular in such a way that after coupling with housing 16 of breech 20 it allows an axial translation of the extractor with regard to housing 16 but prevents any rotation of shank 12 and therefore of extractor 4 with regard to housing 16.
  • So hook-up part 32 may vary its axial position with regard to housing 16, following activation of extractor 4, but cannot rotate with regard to housing 16 and therefore with regard to the base of the cartridge case in the shotgun barrel.
  • the portion of restraint extends in such a way as to achieve prismatic coupling with housing 16 even in a configuration of maximum protrusion of the extractor from the housing itself.
  • the portion of restraint 40 is coupled with the housing in such a way as to constitute a prismatic guide for the extractor.
  • the portion of restraint of the shank has a transversal section that is triangular, quadrangular, for example square or rectangular, elliptical or hexagonal.
  • portion of restraint 40 of the shank has a transversal section at least partially circular and equipped, in correspondence to a part of circular side wall 47, with at least one ribbing 48 suitable for preventing rotation of the shank with regard to the housing.
  • Shank 12 has at least one recess 60 suitable for engagement with an action mechanism 64 of shotgun 24, suitable for extracting extractor 4 from its housing 16.
  • Extractor 4 may be subdivided into two parts 4',4", symmetrical with regard to a symmetry plane parallel to the said axial direction X-X, each part of the extractor 4',4" being suitable for interfacing with cartridges in side by side or over-and-under shotgun barrels.
  • the two parts 4',4" are mechanically separate in such a way as to be activated by action mechanism 64 independently. In this way it is possible, on opening the break action, to remove only the fired cartridge case.
  • a shotgun 24 in accordance with this invention preferably has, in breech 20, a housing 16 for extractor 4, the said housing being at least partially counterprofiled with regard to portion of restraint 40 of shank 12 of extractor 4.
  • the shank creates with the shotgun housing a coupling of form suitable to permit translation of shank 12 with regard to the housing along axial direction X-X and to prevent rotation of the shank with regard to the housing in terms of axial direction X-X.
  • shotgun 24 consists of a breech 20 with a housing 16 for the extractor that is at least partially counterprofiled with regard to portion of restraint 40 of the extractor shank in such a way as to create, in a mounting configuration of extractor 4, a prismatic coupling of shank 12 and housing 16 suitable for permitting solely the translation of the extractor in housing 16 and preventing rotation of the extractor with regard to housing 16.
  • the shotgun housing may therefore have a transversal section that is triangular or quadrangular, for example square or rectangular, elliptical, hexagonal, trapezoidal or, for example, swallow-tail.
  • the extractor housing has a transversal section at least partially circular and equipped, in correspondence to a circular portion of lateral wall, with at least one ribbing suitable for engagement with groove 49 of shank 12 of extractor 4, in such a way as to prevent rotation of extractor 4 in housing 16.
  • the extractor housing has a transversal section at least partially circular equipped, in correspondence to a circular portion of lateral wall, with at least one groove suitable for receiving ribbing 48 of shank 12 of extractor 4, in such a way as to prevent rotation of extractor 4 in housing 16.
  • the shotgun consists of double barrels 8, side by side or over-and-under, and an extractor 4 subdivided into two parts 4',4", mechanically distinct and symmetrical with regard to a symmetry plane parallel to the said axial direction, each part 4',4" of extractor 4 being suitable for interfacing with cartridges contained in the said barrels.
  • the shotgun moreover consists of action mechanism 64, for example of a well known type, suitable for engagement with extractors 4 in such a way as to activate their extraction.
  • the shotgun is preferably of the break-action kind and the action mechanism is actuated by the movement of opening the break action. In other words, on opening the break action the extractors extract the cartridge cases from the barrels.
  • housing 16 in breech 20 sets out from a full section of breech 20, working it with an electro-erosion head.
  • the electro-erosion head is counterprofiled with regard to the housing in such a way as to obtain the housing in the breech in negative.
  • the electro-erosion head has the form of the shank of the associable extractor. It is also possible to create a housing 16 which is initially cylindrical, for example by drilling a dead hole and subsequently working the housing with an electro-erosion head in such a way as to obtain a non-circular geometry.
  • a dead hole may be drilled with a diameter equal to the diameter of the maximum imaginary circle 46 containable in the said housing section and the latter be subsequently modified in such a way as to render it non-circular and suitable for creating a prismatic guide for the extractor.
  • the advantage of first drilling a dead hole lies in limiting the portion of material to be eroded by the electro-erosion head, thus reducing the time and costs of electro-erosion.
  • the extractor and the shotgun in accordance with the invention overcome the drawbacks involved in the current technique.
  • the extractor creates a prismatic guide with the housing of the breech.
  • the housing has the function not only of guiding the axial translation movement of the shank but also of preventing any rotation with regard to the housing.
  • the extractor shank has both the function of extractor axial guide and anti-rotation device.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Telescopes (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
EP08104845A 2007-07-27 2008-07-23 Anti-rotation extractor for shotgun, and related shotgun Withdrawn EP2028433A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITBS20070110 ITBS20070110A1 (it) 2007-07-27 2007-07-27 Estrattore antirotante per fucile e fucile

Publications (1)

Publication Number Publication Date
EP2028433A1 true EP2028433A1 (en) 2009-02-25

Family

ID=39944370

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08104845A Withdrawn EP2028433A1 (en) 2007-07-27 2008-07-23 Anti-rotation extractor for shotgun, and related shotgun

Country Status (2)

Country Link
EP (1) EP2028433A1 (it)
IT (1) ITBS20070110A1 (it)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE354877A (it) *
FR1111992A (fr) * 1954-11-12 1956-03-07 Dispositif de verrouillage et d'extraction pour carabines à canon basculant
US2952933A (en) * 1958-06-05 1960-09-20 Llewellyn W Evans Shell retainer mounted on extractor
US5018293A (en) * 1989-09-27 1991-05-28 Kolars Arms Shotgun shell ejector/extractor means for skeet gun carrier barrel having smaller gauge tube therein
US20050262749A1 (en) * 2002-12-02 2005-12-01 Browning Arms Company Over-and-under shotgun apparatus and method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE354877A (it) *
FR1111992A (fr) * 1954-11-12 1956-03-07 Dispositif de verrouillage et d'extraction pour carabines à canon basculant
US2952933A (en) * 1958-06-05 1960-09-20 Llewellyn W Evans Shell retainer mounted on extractor
US5018293A (en) * 1989-09-27 1991-05-28 Kolars Arms Shotgun shell ejector/extractor means for skeet gun carrier barrel having smaller gauge tube therein
US20050262749A1 (en) * 2002-12-02 2005-12-01 Browning Arms Company Over-and-under shotgun apparatus and method

Also Published As

Publication number Publication date
ITBS20070110A1 (it) 2009-01-28

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