US3447417A - Gun with a floating breech bolt - Google Patents

Gun with a floating breech bolt Download PDF

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Publication number
US3447417A
US3447417A US618595A US3447417DA US3447417A US 3447417 A US3447417 A US 3447417A US 618595 A US618595 A US 618595A US 3447417D A US3447417D A US 3447417DA US 3447417 A US3447417 A US 3447417A
Authority
US
United States
Prior art keywords
breech
bolt
gun
breech bolt
bolt head
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
US618595A
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English (en)
Inventor
Bruno Civolani
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
Application granted granted Critical
Publication of US3447417A publication Critical patent/US3447417A/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
    • F41A3/36—Semi-rigid bolt locks, i.e. having locking elements movably mounted on the bolt or on the barrel or breech housing
    • F41A3/38—Semi-rigid bolt locks, i.e. having locking elements movably mounted on the bolt or on the barrel or breech housing having rocking locking elements, e.g. pivoting levers or vanes
    • F41A3/40—Semi-rigid bolt locks, i.e. having locking elements movably mounted on the bolt or on the barrel or breech housing having rocking locking elements, e.g. pivoting levers or vanes mounted on the bolt

Definitions

  • the prior art fixed barrel guns have the disadvantage that prior to firing it is required to effect a manual adjustment of the gun which is necessary for prearranging 1t to stand the pressure which will be generated by the cartridge during explosion in order not to damage the breech frame duringrecoil and to facilitate the ejection of the cartridge case.
  • the gun according to the invention is characterized in that it has the bolt head separated from the breech bolt with a spring loosely interposed therebetween.
  • the spring should be suitably designed to perform the following functions:
  • FIG. l shows in a perspective view, partially in section, the portion of a sporting gun concerning this invention, with the breech bolt ready for iirng;
  • F'IG. 2 shows in a perspective view, partially in section, the portion of a sporting gun concerning this invention 3,447,417 Patented June 3, 1969 showing the relative positions between the breech bolt and bolt head due to the reaction to firing, and
  • FIG. 3 shows in a perspective view, partially in section, the portion of a sporting gun concerning this invention, with the breech bolt in the bolt head unlocking and recoil stage.
  • a breech frame 7 containing a bolt head 1 and a breech bolt 9 between which a helical spring 10 is loosely interposed.
  • the bolt head 1 and the breech bolt 9 have an axial bore 12, 13 respectively for providing a passage for the striker 14.
  • the bolt head 1 has a recess 15 having a rounded end, in which a correspondingly rounded end 4 of a nib 3 seatingly engages. The latter ends at the other end with a foot 5 having four -flat faces 16, 17, 18 and 19, whose function will be explained hereinafter.
  • the face 16 is adapted to cooperate with a ramp 6 in the breech frame 7, the face 17 is adapted to cooperate with a fface 20 in a cavity 21 in the lower portion of the breech bolt 9, the face 18 is adapted to cooperate with a fa'ce 22 in the cavity 21 of the breech bolt 9 and the face 19 is adapted to cooperate with a face 8 in the cavity 21 of the breech bolt 9.
  • the tiring hammer is shown at 23 and the cartridge chamber at 24.
  • the bolt head 1 locks a cartridge 2 in the cartridge chamber 24 by means of the nib 3 acting as a push rod which engages at its rounded end 4 the corresponding rounded portion in the recess 15 and at its other end, by means of the face 16 engaging the ramp 6 in the breech frame.
  • the gun is thus ready for firing.
  • the spring 10 After the spring 10 is compressed, to a predetermined degree because of the relative movement in opposite directions between the mobile breech bolt 9 and the bolt head 1 during the recoil of the whole gun, the spring, in the recoil subsiding stage, moves the breech bolt 9 rearwardly. During such movement, the face 22 strikes the falce 18 on the foot 5 of the nib 3 causing the face 16 to slide over the ramp 6 in the breech frame 6 until the face 17 on the foot 5 engages the face 20' of the breech bolt 9 (see FIG. 3) thus releasing the nib 3 from its engagement with the breech frame 7.
  • the bolt head 1 because partly of the remaining recoil action and partly of the discharge gases, follows the breech bolt 9 in its back movement until the mobile breech bolt and bolt head assembly strikes against the rear portion of the breech frame 7 enabling a regular and easy ejection of the cartridge case.
  • a breech frame having a firing chamber, a bolt head -within the frame, one end of said head closing said chamber and said end having a recess formed therein, said bolt head being formed with a cylindrical extension having a passage therethrough, a ring pin in said passage, a oating breech bolt slidably mounted within said 'frame and having a sleeve-like portion receiving the cylindrical extension of said bolt head and having also a passage aligned with said first named passage for receiving said ring pin, an inclined abutment formed on said breech frame, a locking nib within said frame having one end extending into the recess in the bolt head and the other end engaging said abutment to lock said bolt head in a forward ring position, and a spring interposed between said cylindrical extension and said breech bolt, said breech bolt and bolt head being relatively movable in opposite directions at firing of the gun due to recoil forces and the inertia of said breech

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Golf Clubs (AREA)
  • Toys (AREA)
US618595A 1966-03-09 1967-02-27 Gun with a floating breech bolt Expired - Lifetime US3447417A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT517266 1966-03-09

Publications (1)

Publication Number Publication Date
US3447417A true US3447417A (en) 1969-06-03

Family

ID=11118807

Family Applications (1)

Application Number Title Priority Date Filing Date
US618595A Expired - Lifetime US3447417A (en) 1966-03-09 1967-02-27 Gun with a floating breech bolt

Country Status (5)

Country Link
US (1) US3447417A (en:Method)
BE (1) BE695019A (en:Method)
ES (1) ES337702A1 (en:Method)
FR (1) FR1513776A (en:Method)
GB (1) GB1182454A (en:Method)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0156423A1 (fr) * 1984-03-28 1985-10-02 FABRIQUE NATIONALE HERSTAL en abrégé FN Société Anonyme Perfectionnements aux armes de chasse
US7661219B1 (en) * 2007-01-10 2010-02-16 Knights Armament Company Ambidextrous bolt catch for firearms
WO2012176086A1 (en) 2011-06-23 2012-12-27 Fabbrica D'armi Pietro Beretta S.P.A. Firearm operating system
EP2017565A3 (en) * 2007-07-20 2015-04-08 BENELLI ARMI S.p.A. Locking and recocking assembly with swivel breech-lock and rotating locking head, particularly for inertially-actuated weapons using the kinetic energy of recoil

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US676094A (en) * 1900-04-19 1901-06-11 Robert W Linville Magazine-firearm
US1109910A (en) * 1914-06-13 1914-09-08 James Eastwick Automatic small-arm.
GB511084A (en) * 1938-01-22 1939-08-14 Ferenc Gebauer Improvements in or relating to gas-operated firearms
US2365389A (en) * 1941-11-04 1944-12-19 J M & M S Browning Company Firearm
US2866387A (en) * 1957-01-11 1958-12-30 Rudolph E Stern Breech block mechanism
US2890626A (en) * 1955-05-13 1959-06-16 Sig Schweiz Industrieges Locking members for a composite breech block

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US676094A (en) * 1900-04-19 1901-06-11 Robert W Linville Magazine-firearm
US1109910A (en) * 1914-06-13 1914-09-08 James Eastwick Automatic small-arm.
GB511084A (en) * 1938-01-22 1939-08-14 Ferenc Gebauer Improvements in or relating to gas-operated firearms
US2365389A (en) * 1941-11-04 1944-12-19 J M & M S Browning Company Firearm
US2890626A (en) * 1955-05-13 1959-06-16 Sig Schweiz Industrieges Locking members for a composite breech block
US2866387A (en) * 1957-01-11 1958-12-30 Rudolph E Stern Breech block mechanism

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0156423A1 (fr) * 1984-03-28 1985-10-02 FABRIQUE NATIONALE HERSTAL en abrégé FN Société Anonyme Perfectionnements aux armes de chasse
US7661219B1 (en) * 2007-01-10 2010-02-16 Knights Armament Company Ambidextrous bolt catch for firearms
EP2017565A3 (en) * 2007-07-20 2015-04-08 BENELLI ARMI S.p.A. Locking and recocking assembly with swivel breech-lock and rotating locking head, particularly for inertially-actuated weapons using the kinetic energy of recoil
WO2012176086A1 (en) 2011-06-23 2012-12-27 Fabbrica D'armi Pietro Beretta S.P.A. Firearm operating system

Also Published As

Publication number Publication date
BE695019A (en:Method) 1967-08-14
DE1553854B2 (de) 1975-11-13
DE1553854A1 (de) 1971-06-09
FR1513776A (fr) 1968-02-16
GB1182454A (en) 1970-02-25
ES337702A1 (es) 1968-04-16

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