US20210048267A1 - Ambidextrous firearm bolt - Google Patents

Ambidextrous firearm bolt Download PDF

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Publication number
US20210048267A1
US20210048267A1 US16/964,446 US201916964446A US2021048267A1 US 20210048267 A1 US20210048267 A1 US 20210048267A1 US 201916964446 A US201916964446 A US 201916964446A US 2021048267 A1 US2021048267 A1 US 2021048267A1
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US
United States
Prior art keywords
bolt
firearm
head
carrier
bolt body
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.)
Abandoned
Application number
US16/964,446
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English (en)
Inventor
Brian F. Abbott
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
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of US20210048267A1 publication Critical patent/US20210048267A1/en
Abandoned 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
    • F41A3/16—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 locking elements effecting a rotary movement about the barrel axis, e.g. rotating cylinder bolt locks
    • 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
    • F41A15/12—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 bolt-action guns
    • F41A15/14—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 bolt-action guns the ejector being mounted on or within the bolt; Extractors per se
    • 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
    • F41A3/16—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 locking elements effecting a rotary movement about the barrel axis, e.g. rotating cylinder bolt locks
    • F41A3/26—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 locking elements effecting a rotary movement about the barrel axis, e.g. rotating cylinder bolt locks semi-automatically or automatically operated, e.g. having a slidable bolt-carrier and a rotatable bolt
    • 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
    • F41A35/00—Accessories or details not otherwise provided for
    • F41A35/06—Adaptation of guns to both right and left hand use

Definitions

  • the present invention relates to the field of firearms and more particularly relates to a firearm bolt which may be adapted to either left-sided or right-sided ejection of spend ammunition from said firearm.
  • the present invention is an ambidextrous firearm bolt which utilizes a central bolt head structure which may be inserted and used in either side of a bolt carrier, thereby allowing for ejection on either side of a firearm.
  • the present invention represents a departure from the prior art in that the ambidextrous bolt of the present invention allows for the easy conversion from right to left-handed ejection in a firearm, or vice versa with the use and adaptation of a single component structure.
  • an improved ambidextrous bolt may provide a that meets the following objectives: that it be a single component part of the firearm, even if comprising individual sub-components, with no interchange of parts for others to make the conversion; that it be simple and easy to operate and convert, and that it be cost effective in construction.
  • a new and improved ambidextrous firearm bolt may comprise elongate bolt head with an ejector, the bolt head also designed to alternately fit in a bolt carrier in a manner to allow left and right-handed ejection of spent cartridges in order to accomplish these objectives.
  • FIG. 1 is a perspective view of one embodiment of an ambidextrous firearm bolt, in a right-handed configuration.
  • FIG. 2 is a top plan view of the firearm bolt of FIG. 1 .
  • FIG. 3 is an exploded view of the firearm bolt of FIG. 1 .
  • FIG. 4 is a partial exploded view of the firearm bolt of FIG. 1 , in a left-handed configuration.
  • FIGS. 5A-5I are successive perspective view of the firearm bolt of FIG. 1 , being converted from left-sided to right-sided use.
  • FIG. 6 is a perspective view of a firearm bolt and associated shotgun shell.
  • FIG. 7 is a partial section of the firearm bolt and shell of FIG. 6 .
  • FIG. 8 is a side elevation of the partial cross-section of FIG. 7 .
  • FIG. 9 is a close-up of the firearm bolt and shell of FIG. 8 , taken in circle A.
  • FIGS. 10A-10F are successive top plan views of the firearm bolt of FIG. 1 , progressing through a firing cycle.
  • FIGS. 11A-11F are successive front plan views of the firearm bolt of FIGS. 10A-10F .
  • the ambidextrous firearm bolt is herein described. It should be noted that the articles “a”, “an”, and “the”, as used in this specification, include plural referents unless the content clearly dictates otherwise. It should also be noted that the illustrated firearm bolt is primarily made for a shot gun, thus the use of a shot gun shell in FIGS. 6-9 . However, this is only illustrative and the use of the firearm bolt with any suitable firearm should be understood to be included within the purview of the invention. Likewise, the term “cartridge” should be read to include any self-contained ammunition unit with an explosive charge and a payload, including a shotgun shell.
  • the firearm bolt 10 contains the firing pin 130 and comprises a carrier 110 and a bolt body 120 .
  • the bolt body 120 has a bulbous bolt head 122 designed to interface with a firearm cartridge and more narrow neck 124 while the carrier features two opposed helical slots 112 , 114 on its dorsal side.
  • a selector pin 126 may reside within either one of the opposed helical slots 112 , 114 , depending on the configuration of the bolt.
  • the selector pin 126 is positioned in the bolt neck 124 in one of two provided selector holes 125 .
  • a lock pin 128 is utilized as a final securement pin for the whole bolt assembly, being located proximate an end of the bolt body 120 opposite the head 122 .
  • Carrier 110 may be of any general shape to comport with the firearm itself, as may bolt body 120 .
  • the bolt head 122 features a plurality of lugs (usually, but not necessarily, three) 130 , one of which has an extractor 134 residing in a slot 132 .
  • the extractor 134 is spring loaded 136 in a manner to latch on to some form of cartridge ammunition (be it a shotgun shell or rifle cartridge) when interacting with the same and then releasing it when biased against spring pressure.
  • the firearm bolt may be converted from left-handed to right-handed election.
  • the bolt 10 starts in left handed ejection and the bolt body 120 is compressed into the bolt carrier 110 .
  • the bulbous head 122 prevents the bolt body 120 passing entirely through the bolt carrier 110 .
  • the selector pin 125 is in the left helical slot 112 which is denoted with an “L”, though any denotation scheme would suffice.
  • This exposes lock pin 128 in the neck 124 of the bolt body, which is removed and allows the firing pin 140 to also be removed ( FIG. 5B ). It should be noted that any means of securement of lock pin 128 may be utilized, and in the illustrated case a ball detent is used.
  • selector pin 126 may also be removed ( FIG. 5D ). It should be noted that a hole in selector pin 126 accommodates firing pin 140 , which secures selector pin 126 in place. Other means, like a ball detent may also be used.
  • the selector pin 126 is removed, the whole bolt body 120 may be removed and then inserted into the other side of carrier 110 ( FIGS. 5E and 5F ). The process is then reversed ( FIGS. 5G-5I ) with selector pin 126 now in right helical slot 114 , denoted with an “R” or some other denotation.
  • the bolt 10 In firing, FIGS. 10A-10F and 11A-11F , the bolt 10 , including bolt body 120 and carrier 110 present a cartridge into battery position.
  • the cartridge 140 is first grasped by the extractor 134 when the bolt 10 is in a reloading position ( FIGS. 6-9 ), usually at the opposite end of the bolt stroke than battery.
  • the extractor 134 is biased against spring pressure into an open position, allowing the cartridge 150 to be seated within a rim 123 in the bolt head ( FIG. 9 ). This is usually accomplished by an interaction with the receiver.
  • the spring pressure engages the extractor 134 about a rim of the cartridge.
  • the bolt 10 then pushes the cartridge 150 into battery.
  • the cartridge 150 and bolt body 120 may not move any further forward ( 10 A, 11 A), however, the carrier 110 continues forward ( 10 B, 11 B). This continued forward movement forces the selector pin 126 to act against the helical slot 112 in which it resides, causing a gradual twisting motion to be imparted on the bolt body 120 ( 10 C, 11 C). As the twisting continues, the extractor 134 moves into a 12:00 o'clock position ( 10 E, 11 E) and the firing pin 130 is released, causing an initial recoil of the bolt body 120 ( 10 F, 11 F) and sends the whole bolt 10 away from battery to begin the firing cycle again.
  • the extractor 134 maintains its hold on the cartridge 150 until it interfaces with the receiver or other structure again, thereby opening and releasing the cartridge 150 out the ejection port.
  • the selection of direction shown in FIGS. 5A-5I changes the direction of the twist in relation to the firearm, allowing the eventual ejection to occur through either a right or left port.
  • the present invention has industrial applicability as it may be manufactured as a product of industry and is a component for a firearm. As such, it may be fashioned of any suitable material, with preference given to metals such as steel.
  • the individual shape of the components may be driven by the eventual shape and geometry of the firearm in which the bolt is intended to be used.
  • the bulbous nature of the bolt body may be increased or reduced, even to the point of no longer being bulbous per se, as necessary to secure ammunition and also pass through the mechanism of the firearm.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Vibration Dampers (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
US16/964,446 2018-01-23 2019-01-23 Ambidextrous firearm bolt Abandoned US20210048267A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201862620941P 2018-01-23 2018-01-23
PCT/US2019/014822 WO2019147723A1 (fr) 2018-01-23 2019-01-23 Culasse d'arme à feu ambidextre

Publications (1)

Publication Number Publication Date
US20210048267A1 true US20210048267A1 (en) 2021-02-18

Family

ID=67395715

Family Applications (1)

Application Number Title Priority Date Filing Date
US16/964,446 Abandoned US20210048267A1 (en) 2018-01-23 2019-01-23 Ambidextrous firearm bolt

Country Status (2)

Country Link
US (1) US20210048267A1 (fr)
WO (1) WO2019147723A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11466944B1 (en) * 2020-01-17 2022-10-11 Serbu Firearms, Inc., A Florida Corporation Firearm bolt carrier group
RU2788642C1 (ru) * 2022-03-09 2023-01-24 федеральное государственное бюджетное образовательное учреждение высшего образования "Ижевский государственный технический университет имени М.Т. Калашникова" Стрелковое оружие
US11674775B1 (en) 2020-01-17 2023-06-13 Serbu Firearms, Inc. Firearm handguard

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI703303B (zh) * 2019-08-26 2020-09-01 國防部軍備局生產製造中心第２０５廠 反衝式自動武器循環射擊機構
EP3800430B1 (fr) 2019-10-04 2023-06-07 Glock Technology GmbH Arme à feu
CN115552193A (zh) 2020-05-14 2022-12-30 罗伯特·J·克雷格 双手通用式枪械枪栓组件及其使用方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3791060A (en) * 1973-03-08 1974-02-12 N Weaver Convertible bolt action rifle
US4440062A (en) * 1981-08-07 1984-04-03 Mcqueen Sidney J Reversible bolt for firearms
DE19903327B4 (de) * 1999-01-28 2004-08-12 Heckler & Koch Gmbh Verschlußvorrichtung für eine Handfeuerwaffe
ITMI20021016A1 (it) * 2002-05-13 2003-11-13 Beretta Armi Spa Dispositivo di estrazione ed espulsione di un bossolo in un'arma da fuoco
US8745911B2 (en) * 2011-11-17 2014-06-10 Jing Zheng Bolt assembly and bolt carrier assembly with switch mechanism for discharging spent casing from either side of firearm receiver without need of disassembling the firearm
US9032860B2 (en) * 2012-12-17 2015-05-19 Faxon Firearms, Llc Gas piston operated upper receiver system
FR3013439B1 (fr) * 2013-11-15 2016-09-02 Olivier Cassar Culasse ambidextre d'une arme a feu
US9377255B2 (en) * 2014-02-03 2016-06-28 Theodore Karagias Multi-caliber firearms, bolt mechanisms, bolt lugs, and methods of using the same
US9885528B2 (en) * 2015-02-26 2018-02-06 Sturm, Ruger & Company, Inc. Bolt for bolt action rifles
US9587895B1 (en) * 2016-01-19 2017-03-07 Brian F. Abbott Rotatable firearm bolt

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11466944B1 (en) * 2020-01-17 2022-10-11 Serbu Firearms, Inc., A Florida Corporation Firearm bolt carrier group
US11674775B1 (en) 2020-01-17 2023-06-13 Serbu Firearms, Inc. Firearm handguard
RU2788642C1 (ru) * 2022-03-09 2023-01-24 федеральное государственное бюджетное образовательное учреждение высшего образования "Ижевский государственный технический университет имени М.Т. Калашникова" Стрелковое оружие

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Publication number Publication date
WO2019147723A1 (fr) 2019-08-01

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