US3859745A - Hunting gun with floating bolt provided with a device for locking the bolt head in the bolt breech upon firing - Google Patents

Hunting gun with floating bolt provided with a device for locking the bolt head in the bolt breech upon firing Download PDF

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Publication number
US3859745A
US3859745A US379604A US37960473A US3859745A US 3859745 A US3859745 A US 3859745A US 379604 A US379604 A US 379604A US 37960473 A US37960473 A US 37960473A US 3859745 A US3859745 A US 3859745A
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US
United States
Prior art keywords
floating element
breech
bolt head
locking bolt
locking
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
US379604A
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English (en)
Inventor
Giovanni Benelli
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.)
Benelli Armi SpA
Original Assignee
Benelli SpA
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 Benelli SpA filed Critical Benelli SpA
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Publication of US3859745A publication Critical patent/US3859745A/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
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A3/00—Breech mechanisms, e.g. locks
    • F41A3/12—Bolt action, i.e. the main breech opening movement being parallel to the barrel axis
    • F41A3/14—Rigid bolt locks, i.e. having locking elements rigidly mounted on the bolt or bolt handle and on the barrel or breech-housing respectively
    • F41A3/32—Rigid bolt locks, i.e. having locking elements rigidly mounted on the bolt or bolt handle and on the barrel or breech-housing respectively the bolt being rocked about a notional axis transverse to the barrel axis

Definitions

  • the hunting gun has a bolt assembly comprising two parts, namely a locking head and a floating element with a spring interposed between the two parts.
  • the locking head comprises essentially one or more projections adapted to engage corresponding recesses in the cylindrical internal surface of the breech and a surface inclined with respect to the breech axis and adapted to engage a mating surface of the floating element.
  • the hunting gun disclosed in the above Italian patent is provided with a bolt assembly consisting in two portions, namely a locking bolt head and a floating element adapted to axially reciprocate with respect to the locking bolt head and to unlock it during the movement in one of the two directions, a spring being interposed between said two portions.
  • the weapon Upon firing, the weapon undergoes a recoiling action due to the pressure developed by gases generated upon the explosion of the cartridge charge caused by the firing pin, however, the floating element being free with respect to the breech, accomplishes by its inertia an axial movement relative to the locking bolt head,-
  • the locking device of the locking bolt head comprises a push rod, which in the locking position of the locking bolt head is placed between the locking bolt head and a shoulder provided in the breech, and is adapted to be disengaged from the breech during the return stroke of the bolt floating element and to be entrained by the floating element during its stroke.
  • This invention aims to make the locking device of the bolt head more simple and economical.
  • the hunting gun is characterized in that the locking bolt head comprises a first surface provided with one or more projections adapted to engage in corresponding recesses provided in the cylindrical internal surface of the breech, a second surface adapted to engage a mating surface of the floating element of the bolt and to slide thereon during the initial intertial movement of the floating element so as to maintain the projections of the first surface in the corresponding recesses of the second surface, said two mating surfaces under these conditions being substantially parallel to the breech axis, and a third surface, inclined with respect to the breech axis and adapted to engage a mating surface of the floating element and to slide thereon during the next back movement of the floating element so as to permit the projection or projections to disengage from the corrsponding recesses provided in the breech.
  • FIG. 1 is a fragmentary axial section of a hunting gun according to the invention, in "the firing step of the weapon;
  • FIG. 2 is a fragmentary axial section of the gun shown in FIG. 1, in the unlocking step of the weapon;
  • FIG. 3A is a side elevation view of the locking bolt head of the weapon shown in FIGS. 1 and 2;
  • FIG. 3B is a top plan view of the locking bolt head shown in FIG. 3A.
  • FIG. 4 is a side elevation of the bolt floating element of the weapon shown in FIGS. 1 and 2.
  • FIG. 1 there is shown the locking bolt head 1 which, upon firing, locks the cartridge 2 into the cartridge chamber 17 through the engagement of three curved ribs 3 extending from a curved surface 15 of the bolt head into corresponding curved grooves (see FIG. 2) provided in the breech 7.
  • This engagement is assured by the engagement of a flat 13 (see FIG. 4) provided in the floating element 9 of the bolt, with a flat 16 (see FIG. 3A) of the locking bolt head 1.
  • a spring 10 is placed between the locking bolt head 1 and the floating element 9.
  • the locking bolt head 1 is also provided with two inclined surfaces 8 (see FIGS. 3A and 38) adapted to cooperate with mating inclined surfaces 12 provided in the floating element 9.
  • FIG. 1 the weapon is shown at the time of firing.
  • the hammer 18 has been brought by the actuation of the trigger (not shown) in contact with the firing pin 19 which by striking the explosive charge of the cartridge 2 causes the explosion of the charge with resulting gas release and ejection of the small shot charge 20.
  • the weapon recoils by reaction against the shooter shoulder, however the bolt floating element 9, being out of engagement with the remainder of the gun, has the tendency to maintain its own position thereby compressing the spring 10 interposed between the floating element and the locking head 1.
  • the flat 16 of the locking head slides with respect 'to the flat 13 of the floating element 9 which keeps the locking head in the position shown in FIG. 1, with the ribs 3 in engagement within the grooves 14 in the breech 7.
  • a hunting gun having a cartridge chamber and a breech extending along an axis including a cylindrical internal surface, said gun provided with a bolt assembly comprising a locking bolt head and a floating element adapted for axial movement in back and forth directions with respect to the locking bolt head and to unlock it during the movement in one of the two directions, and a spring interposed between said locking bolt head and said floating element, characterized in that said locking bolt head comprises a first surface provided with at least one projection adapted to engage in corresponding recesses provided in the cylindrical in ternal surface of the breech, a second surface adapted to engage a first mating surface of the floating element of the bolt assembly and to slide thereon during the initial inertial movement of the floating element so as to maintain said at least one projection of the first surface in the corresponding recesses of the second surface, said two mating surfaces under these conditions being substantially parallel to the breech axis, and a third surface, said third surface being inclined with respect to the breech axis and adapted to engage a second mating
  • a hunting gun characterized in that said first surface of the locking bolt head, said at least one projection thereof and said recesses provided in the cylindrical internal surface ofthe breech are curved.
  • a hunting gun characterized in that said second and third surfaces of said locking bolt head and said cooperating surfaces of said bolt floating element are flat surfaces.
  • a huntinggun according to claim 3 characterized in that said inclined surfaces of said locking bolt head and said bolt floating element merge in the surfaces of said elements substantially parallel to the breech axis.
  • a hunting gun characterized in that said third inclined surface of said locking bolt head comprises two distinct areas disposed at both sides of said first and second surfaces of said locking bolt head.
  • a hunting gun characterized in that said locking bolt head comprises a short cylindrical section intended to close the cartride chamber, and a rod-shaped extension carrying said projection and said second and third surfaces cooperating with said first and second mating surfaces respectively of said bolt floating element, and said floating element is substantially cylinder-shaped, said floating element being provided with a longitudinal slot intended to receive said rod-shaped extension of said locking bolt head.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
US379604A 1972-07-18 1973-07-16 Hunting gun with floating bolt provided with a device for locking the bolt head in the bolt breech upon firing Expired - Lifetime US3859745A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT27099/72A IT962932B (it) 1972-07-18 1972-07-18 Fucile da caccia con otturatore oscillante munito di dispositivo di bloccaggio della testa di chiu sura nella culatta all atto dello sparo

Publications (1)

Publication Number Publication Date
US3859745A true US3859745A (en) 1975-01-14

Family

ID=11220945

Family Applications (1)

Application Number Title Priority Date Filing Date
US379604A Expired - Lifetime US3859745A (en) 1972-07-18 1973-07-16 Hunting gun with floating bolt provided with a device for locking the bolt head in the bolt breech upon firing

Country Status (11)

Country Link
US (1) US3859745A (xx)
JP (1) JPS5420798B2 (xx)
AR (1) AR195241A1 (xx)
BE (1) BE802054A (xx)
CS (1) CS198123B2 (xx)
DE (1) DE2336349C2 (xx)
ES (1) ES416986A1 (xx)
FR (1) FR2193190B1 (xx)
GB (1) GB1390476A (xx)
IE (1) IE37871B1 (xx)
IT (1) IT962932B (xx)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5710389A (en) * 1995-08-14 1998-01-20 The United States Of America As Represented By The Secretary Of The Navy Breech bolt and lock assembly
US5819460A (en) * 1995-08-22 1998-10-13 Sommer + Ockenfuss Gmbh Repeater mechanism for rifles having a straight breech
US5854440A (en) * 1995-10-30 1998-12-29 The United States Of America As Represented By The Secretary Of The Navy Shoulder-launched multi-purpose assault weapon
US20070131104A1 (en) * 2005-10-25 2007-06-14 Alain Botty Semi-automatic rifle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3998126A (en) * 1974-09-03 1976-12-21 Ross Rudd Delayed bolt action for firearm
IT1103394B (it) * 1982-04-28 1985-10-14 Benelli Armi Spa Dispositivo di riconversione di un sistema di funzionamento semiautomatico in un sistema a pompa per fucili da caccia e difesa a canna fissa utilizzanti per inerzia l'energia cinetica del rinculo

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424264A (en) * 1942-10-27 1947-07-22 Gerald A Yorks Composite bolt structure for semiautomatic rifles
US2570772A (en) * 1949-03-03 1951-10-09 Remington Arms Co Inc Recoil operated firearm with pivoted bolt lock
US2887808A (en) * 1957-04-24 1959-05-26 Olin Mathieson Firearms carrier mechanism

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1295559A (fr) * 1961-04-28 1962-06-08 Fusil de chasse à répétition automatique
FR2032073A5 (xx) * 1969-02-18 1970-11-20 Lemardelet Roger

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424264A (en) * 1942-10-27 1947-07-22 Gerald A Yorks Composite bolt structure for semiautomatic rifles
US2570772A (en) * 1949-03-03 1951-10-09 Remington Arms Co Inc Recoil operated firearm with pivoted bolt lock
US2887808A (en) * 1957-04-24 1959-05-26 Olin Mathieson Firearms carrier mechanism

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5710389A (en) * 1995-08-14 1998-01-20 The United States Of America As Represented By The Secretary Of The Navy Breech bolt and lock assembly
US5819460A (en) * 1995-08-22 1998-10-13 Sommer + Ockenfuss Gmbh Repeater mechanism for rifles having a straight breech
US5854440A (en) * 1995-10-30 1998-12-29 The United States Of America As Represented By The Secretary Of The Navy Shoulder-launched multi-purpose assault weapon
US20070131104A1 (en) * 2005-10-25 2007-06-14 Alain Botty Semi-automatic rifle
US7467581B2 (en) * 2005-10-25 2008-12-23 Browning International, Societe Anonyme Semi-automatic rifle

Also Published As

Publication number Publication date
DE2336349A1 (de) 1974-02-14
IE37871B1 (en) 1977-10-26
CS198123B2 (en) 1980-05-30
JPS4980898A (xx) 1974-08-05
GB1390476A (en) 1975-04-16
DE2336349C2 (de) 1984-11-29
FR2193190A1 (xx) 1974-02-15
ES416986A1 (es) 1976-03-01
FR2193190B1 (xx) 1977-08-12
AR195241A1 (es) 1973-09-19
BE802054A (fr) 1973-11-05
JPS5420798B2 (xx) 1979-07-25
IE37871L (en) 1974-01-18
IT962932B (it) 1973-12-31

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