FI128200B - Firing pin safety of a bolt of a firearm - Google Patents

Firing pin safety of a bolt of a firearm Download PDF

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Publication number
FI128200B
FI128200B FI20186045A FI20186045A FI128200B FI 128200 B FI128200 B FI 128200B FI 20186045 A FI20186045 A FI 20186045A FI 20186045 A FI20186045 A FI 20186045A FI 128200 B FI128200 B FI 128200B
Authority
FI
Finland
Prior art keywords
firing pin
bolt
impact
pin
lock body
Prior art date
Application number
FI20186045A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI20186045A1 (en
Inventor
Hannu Törmänen
Original Assignee
Sako Oy
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 Sako Oy filed Critical Sako Oy
Priority to FI20186045A priority Critical patent/FI128200B/en
Priority to PL19823781.0T priority patent/PL3891460T3/en
Priority to HUE19823781A priority patent/HUE068704T2/en
Priority to CA3121729A priority patent/CA3121729A1/en
Priority to ES19823781T priority patent/ES2988687T3/en
Priority to EP19823781.0A priority patent/EP3891460B1/en
Priority to PCT/FI2019/050869 priority patent/WO2020115367A1/en
Priority to HRP20241372TT priority patent/HRP20241372T1/en
Application granted granted Critical
Publication of FI20186045A1 publication Critical patent/FI20186045A1/en
Publication of FI128200B publication Critical patent/FI128200B/en

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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
    • F41A17/00—Safety arrangements, e.g. safeties
    • F41A17/64—Firing-pin safeties, i.e. means for preventing movement of slidably- mounted strikers
    • F41A17/66—Firing-pin safeties, i.e. means for preventing movement of slidably- mounted strikers automatically operated, i.e. operated by breech opening or closing movement
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Emergency Lowering Means (AREA)
  • Insertion Pins And Rivets (AREA)

Abstract

The invention relates to a firing pin safety of a bolt of a firearm, in which the bolt (10) comprises a bolt carrier (32), a firing pin (15) and a bolt body (22), in which the bolt body (22) is located in a bolt body channel (33) formed to the bolt carrier (32) as a central opening in longitudinal direction of the bolt carrier (32), in which a cam pin (34) is provided for turning movement the bolt body (22), in which the firing pin (15) is located in a firing pin channel (23) formed to the bolt body (22) as a central opening in longitudinal direction of the bolt body (22), and in which in the firing pin channel (23) around the firing pin (15) a spring (17) is located for keeping the firing pin (15) in back position and for slowing down movement of the firing pin (15). The bolt (10) comprises an automatic firing pin safety provided by a safety element (25) located in between guides (35) at each side of the bolt carrier (32) setting the position of the safety element (25).

Description

Firing pin safety of a bolt of a firearm
20186045 prh 27-09- 2019
The present invention relates to firing pin safeties for firearms. More precisely the present invention relates to a firing pin safety of a bolt of a firearm according 5 to the preamble part of claim 1.
In US patent publication is disclosed a firearm, firing pin safety catch mechanism comprising a bolt having a face and proximal end for receiving a firing pin, a bolt carrier, a fi ring pin having a distil end, a proximal end opposite the distil end and a recess, or catch surface, disposed in proximity to the proximal end, a hammer 10 which is moveable from a cocked position through a travel path to make contact with the firing pin, a firing pin spring biasing the firing pin into a rest portion wherein the distil end of the firing pin is designed to be spaced from the forward face of the bolt, and a safety catch mechanism.
In US patent publication 4,658,529 is disclosed a firing pin safety mechanism for 15 a weapon provided with a slide having a firing pin channel, comprising: a firing pin mounted for sliding movement between a ready position wherein at least one end of the firing pin extends outside said firing pin channel and a sheathed position wherein both ends of said firing pin are disposed within the firing pin channel, said firing pin being yieldingly loaded to said ready position, a safety 20 channel in the weapon slide extending transversely of the firing pin channel and intersecting the firing pin channel, a safety mounted in said safety channel for sliding movement between on and off positions, said safety and firing pin being provided with cam means for moving said firing pin to and locking said firing pin in the sheathed position when said safety is moved to the on posi25 tion and for releasing said firing pin for movement to said ready position when said safety is moved to the off position.
One problem in firearms, usually in semi-automatic or automatic firearms, is a slamfire, which is a premature, unintended discharge of a firearm and which typically may occur, when a bolt of the firearm stops rapidly, while a firing pin 30 continues its movement by inertia forward and hits and sets off a primer. Sometimes, the firing pin only causes a dent onto the primer but in the worst cases the slamfire occurs. Typically, the slamfire is prevented by providing the firing pin with a spring around it for slowing down the movement but in all cases the spring is not effective enough as the force of the spring is not enough to prevent
20186045 prh 27-09- 2019 the continuation of the movement of the firing pin. In case one should try to prevent the continuation of the movement of the firing pin in order to prevent the slamfire by increasing preventing force of the spring, it would also mean that the force of the striking hammer should also be increased, which may then cause 5 other problems in the firearm.
An object of the present invention is to create a firing pin safety of a bolt of a firearm by which the above described problems relating to the possible slamfire are eliminated or at least minimized.
Another object of the present invention is to create a new type of a firing pin 10 safety of a bolt of a firearm, in which slamfire is prevented automatically.
In order to achieve the above objects and those that will come apparent later the firing pin safety of a bolt of a firearm is mainly characterized by the features of the characterizing part of claim 1.
Dependent claims present advantageous features and embodiments of the in15 vention.
According to the invention in the firing pin safety of a bolt of a firearm, the bolt comprises a bolt carrier, a firing pin and a bolt body, in which the bolt body is located in a bolt body channel formed to the bolt carrier as a central opening in longitudinal direction of the bolt carrier, in which a cam pin is provided for turning 20 movement of the bolt body, in which the firing pin is located in a firing pin channel formed to the bolt body as a central opening in longitudinal direction of the bolt body, and in which in the firing pin channel around the firing pin a spring is located for keeping the firing pin in back position and for slowing down movement of the firing pin, wherein the bolt comprises an automatic firing pin safety pro25 vided by a safety element located in between guides at each side of the bolt carrier setting the position of the safety element.
According to an advantageous feature of the invention the safety element is used by the turning of the bolt body.
According to an advantageous feature of the invention the spring is located be30 tween the cam pin and a radially extending shoulder formed on and around the firing pin for keeping the firing pin in its back position.
20186045 prh 27-09- 2019
According to an advantageous feature of the invention the guides are movable in respect of the bolt body forward/backward by turning movement of and simultaneously moves by the bolt body such that the guides move the safety element sideways.
According to an advantageous feature of the invention the bolt closed or near closed the safety element is movable sideways to a position, where the firing pin passes the safety element and the firearm can be fired.
According to an advantageous feature of the invention a stopper is provided at the back part of the firing pin resting in a groove of the firing pin for keeping the 10 firing pin inside the bolt body and in the firing pin channel.
By the firing pin safety according to the invention the slamfire is automatically prevented and the firing pin safety according to the invention is applicable in all firearms with revolving type bolts.
In the following the invention and its advantages are explained in greater detail 15 below in the sense of example and with reference to accompanying drawing, where in figure 1 is schematically shown an exploded view of an advantageous example of the invention, in figure 2 is schematically shown the advantageous example of figure 1, when 20 the bolt is open, in figure 3 is schematically shown the example of figure 2 with projections of figures 4A-4B marked, in figures 4A-4B are schematically shown the projections A-A and B-B of figure 3, in figure 5 is schematically shown the example of figure 1, when the bolt is closed, in figure 6 is schematically shown the example of figure 5 with projections of figures 7A-7B marked and in figures 7A-7B are schematically shown the projections C-C and D-D of figure 30 6.
20186045 prh 27-09- 2019
During the course of the following description like numbers and signs will be used to identify like elements according to the different views which illustrate the invention and its advantageous example. In the figures some repetitive reference signs have been omitted for clarity reasons.
As shown in the example of figure 1 the bolt 10 comprises a firing pin 15, a bolt body 22, a bolt carrier 32 with a cam pin 34 and guides 35 located in openings 36 at each side of the bolt carrier 32. Through the bolt carrier 32 extends a bolt body channel 33, into which the bolt body 22 is located and through the bolt body 22 extends a firing pin channel 23 for the firing pin 15. To secure the firing 10 pin 15 a stopper 19 is provided. Additionally, the bolt comprises a spring 17 located around the firing pin 15 in the firing pin channel 23, as can be seen for example in figures 4A-4B and 7A-7B.
In figures 2-4B the bolt 10 and the firing pin safety is shown, when the bolt is open. As can be seen in this position the movement of the firing pin 15 is pre15 vented by the safety element 25 positioned between the guides 35 after the cam pin 34 has turned the bolt body 22 to the open position.
In figures 5-7B the bolt 10 and the firing pin safety is shown, when the bolt is closed. As can be seen in this position the firing pin 15 can pass the safety element 25 and the firearm can be fired as the safety element 25 has been 20 moved sideways to a position guided by the guides after the cam pin 34 has turned the bolt body 22 to the closed position.
In the following function of the bolt 10 and the firing pin safety is explained with reference to the figures 1-7B.
The cam pin 34 is in contact with the bolt body 22 and when the cam pin 34 is 25 turned also the bolt body 22 moves. The bolt carrier 32 is provided with a cam pin groove 37 for the pivot pin 34. The bolt body 22 can turn for example 45° as defined by the cam pin 34 and the cam pin groove 37 in the bolt carrier 32. Due to the turning movement of the bolt body 22, the bolt body 22 moves forwards/backward in the bolt body channel 33. The turning movement of for ex30 ample 45 0 causes that locking surfaces 24, for example four locking surfaces of the bolt body 22 will be set locked and thus to a bolt closed position, in which the firearm can be fired. Inside the bolt body 22 in the firing pin channel 23 the firing pin 15 is provided to move. Around the firing pin 15 and between the cam pin 34 and a shoulder 18 of the firing pin 15 the spring 17 is located to
20186045 prh 27-09- 2019 keep the firing pin 15 in its back position. A stopper 19 is provided at the back part of the firing pin 15 resting in a groove 14 of the firing pin 15 to keep the firing pin 15 inside the bolt body 22 and in the firing pin channel 23.
When the firearm is fired a strike hammer of the firearm strikes the back end of 5 the firing pin 15 and the movement of the firing pin 15 caused by the strike sets primer of the cartridge. During the charging cycle the bolt 10 is pushed backwards by a force of the gas piston and/or recoil simultaneously the used case is ejected. The force of the bolt return spring (not shown) returns the bolt 10 forward and a next cartridge is provided.
The bolt 10 according to the invention comprises an automatic firing pin safety provided by a safety element, which is used by the turning of the bolt body 22 in the bolt carrier 32.
When the bolt 10 is moving in open state forward until the bolt body 22 stops, the safety element 25 is in on-position and prevents movement of the firing pin 15 15 further forward and the movement of the firing pin 15 is prevented. The safety element 25 is located in between the guides 35 at each side of the bolt carrier 32 setting the position of the safety element 25 preventing the movement of the firing pin 15.
When the bolt body 22 turns the guides 35 move in respect of the bolt body 22 20 forward and simultaneously moves by the guides the safety element 25 sideways. At this stage the movement and inertia of the firing pin 15 is over. When the bolt 10 is closed or near closed-position, the safety element 25 has been moved sideways to a position, where the firing pin 15 can pass the safety element 25 and the firearm can be fired.
In the description in the foregoing, although some functions have been described with reference to certain features, those functions may be performable by other features whether described or not. Although features have been described with reference to certain embodiments or examples, those features may also be present in other embodiments or examples whether described or not.
20186045 prh 27-09- 2019
Reference signs used in the drawing bolt groove firing pin
17 spring shoulder stopper bolt body firing pin channel
24 locking surfaces safety element bolt carrier bolt body channel cam pin
35 guide guide opening cam pin groove

Claims (6)

Patenttivaatimukset 20186045 prh 27-09- 2019Claims 20186045 prh 27-09-20199 1. Aseen lukon iskupiikkivarmistin, jossa lukko (10) käsittää lukkoluistin (32), iskupiikin (15) ja lukkorungon (22), jossa lukkorunko (22) on sijoitettu lukkorunkokanavaan (33, joka on muo5 dostettu lukkoluistiin (32) keskiaukkona lukkoluistin (32) pitkittäisessä suunnassa (32), johon on järjestetty kääntötappi (34) lukkorungon (22) kääntöliikettä varten, jossa iskupiikki (15) on sijoitettu iskupiikkikanavaan (23), joka on muo10 dostettu lukkorunkoon (22) keksiaukkona lukkorungon (22) pitkittäisessä suunnassa, ja jossa iskupiikkikanavassa (23) iskupiikin (15) ympärille on sijoitettu jousi (17) iskupiikin (15) pitämiseksi taka-asemassa ja iskupiikin (15) liikkeen hidastamiseksi,A gun lock impact pin fitting, wherein the lock (10) comprises a lock slide (32), an impact pin (15) and a lock body (22), wherein the lock body (22) is disposed in the lock body channel (33) ) in a longitudinal direction (32) provided with a pivot pin (34) for pivoting the lock body (22), wherein the impact pin (15) is disposed in the impact pin channel (23) formed in the lock body (22) as an opening in the longitudinal direction of the lock body (22); wherein a spring (17) is disposed in the stroke channel (23) around the striking peak (15) to hold the striking peak (15) in the rear and to slow down the movement of the striking peak (15), 15 tunnettu siitä, että lukko (10) käsittää automaattisen iskupiikkivarmistimen järjestettynä varmuuselementin (25) välityksellä, joka varmuuselementti on sijoitettu lukkoluistin (32) kummallakin puolella olevien ohjaimien (35) väliin varmuuselementin (25) aseman asettamiseksi.15, characterized in that the lock (10) comprises an automatic impact-pin safety device arranged via a safety element (25) disposed between guides (35) on each side of the lock slide (32) for positioning the safety element (25). 2. Patenttivaatimuksen 1 mukainen iskupiikkivarmistin, tunnettu siitä, ettäImpact peak safety device according to claim 1, characterized in that 20 varmuuselementtiä (25) käytetään kääntämällä lukkorunkoa (22).The 20 security elements (25) are actuated by turning the lock body (22). 3. Patenttivaatimuksen 1 tai 2 mukainen iskupiikkivarmistin, tunnettu siitä, että jousi (17) on sijoitettu kääntötapin (34) ja säteittäisesti ulottuvan olakkeen (18) väliin, joka olake on muodostettu iskupiikille (15) ja sen ympärille iskupiikin (15) pitämiseksi taka-asemassaan.Impact spike safety device according to claim 1 or 2, characterized in that the spring (17) is disposed between the pivot pin (34) and the radially extending shoulder (18) formed on and around the impact spike (15) to hold the rear spike (15). position. 2525 4. Jonkin patenttivaatimuksen 1 - 3 mukainen iskupiikkivarmistin, tunnettu siitä, että ohjaimet (35) ovat siirrettävissä eteenpäin/taaksepäin suhteessa lukkorunkoon (22) lukkorungon kääntöliikkeellä ja samanaikaisesti lukkorunko (22) siirtyy siten, että ohjaimet (35) siirtävät varmuuselementtiä (25) sivuttain.Impact locking device according to one of Claims 1 to 3, characterized in that the guides (35) are movable forward / backward relative to the lock body (22) by the pivoting movement of the lock body and simultaneously the lock body (22) is displaced by the guides (35) . 5. Jonkin edellisen patenttivaatimuksen mukainen iskupiikkivarmistin, tunnettu siitä, että lukko (10) suljettuna tai lähes suljettuna varmuuselementti (25) on siirrettävissä sivuttain asentoon, jossa iskupiikki (15) ohittaa varmuuselementin (25) ja ase voidaan laukaista.Impact spike safety device according to one of the preceding claims, characterized in that the lock (10) when closed or nearly closed can be moved sideways to a position where the spike (15) bypasses the safety element (25) and the weapon can be fired. 55 6. Jonkin edellisen patenttivaatimuksen mukainen iskupiikkivarmistin, tunnettu siitä, että pysäytin (19) on järjestetty iskupiikin (15) takaosaan tukeutumaan iskupiikin (15) uraan (14) iskupiikin (15) pitämiseksi lukkorungon (22) sisäpuolella ja iskupiikkikanavassa (23).Impact peak safety device according to one of the preceding claims, characterized in that the stop (19) is arranged at the rear of the impact peak (15) to support the impact peak (15) in the groove (14) to hold the impact peak (15) inside the lock body (22).
FI20186045A 2018-12-04 2018-12-04 Firing pin safety of a bolt of a firearm FI128200B (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
FI20186045A FI128200B (en) 2018-12-04 2018-12-04 Firing pin safety of a bolt of a firearm
PL19823781.0T PL3891460T3 (en) 2018-12-04 2019-12-04 Firing pin safety of a bolt of a firearm
HUE19823781A HUE068704T2 (en) 2018-12-04 2019-12-04 Firing pin safety of a bolt of a firearm
CA3121729A CA3121729A1 (en) 2018-12-04 2019-12-04 Firing pin safety of a bolt of a firearm
ES19823781T ES2988687T3 (en) 2018-12-04 2019-12-04 Firearm bolt firing pin safety
EP19823781.0A EP3891460B1 (en) 2018-12-04 2019-12-04 Firing pin safety of a bolt of a firearm
PCT/FI2019/050869 WO2020115367A1 (en) 2018-12-04 2019-12-04 Firing pin safety of a bolt of a firearm
HRP20241372TT HRP20241372T1 (en) 2018-12-04 2019-12-04 FIRING PIN LATCH SAFETY FOR FIREARMS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20186045A FI128200B (en) 2018-12-04 2018-12-04 Firing pin safety of a bolt of a firearm

Publications (2)

Publication Number Publication Date
FI20186045A1 FI20186045A1 (en) 2019-12-13
FI128200B true FI128200B (en) 2019-12-13

Family

ID=68806358

Family Applications (1)

Application Number Title Priority Date Filing Date
FI20186045A FI128200B (en) 2018-12-04 2018-12-04 Firing pin safety of a bolt of a firearm

Country Status (8)

Country Link
EP (1) EP3891460B1 (en)
CA (1) CA3121729A1 (en)
ES (1) ES2988687T3 (en)
FI (1) FI128200B (en)
HR (1) HRP20241372T1 (en)
HU (1) HUE068704T2 (en)
PL (1) PL3891460T3 (en)
WO (1) WO2020115367A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12050073B2 (en) 2020-05-20 2024-07-30 Sako Oy Firing pin safety of a firearm

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH152282A (en) * 1929-11-09 1932-01-31 Frommer Rudolf Von Cylinder lock for self-loading firearms.
US2626474A (en) * 1951-03-15 1953-01-27 John L Lochhead Firing pin retracting means for firearms
US4389919A (en) * 1980-02-14 1983-06-28 Remington Arms Company, Inc. Firing pin block for firearm with a rotary breech bolt
US4658529A (en) 1984-08-15 1987-04-21 William Bertolini Firing pin safety mechanism
US8245427B2 (en) 2009-06-10 2012-08-21 Lwrc International, Llc Firing pin safety device for auto-loading firearms

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12050073B2 (en) 2020-05-20 2024-07-30 Sako Oy Firing pin safety of a firearm

Also Published As

Publication number Publication date
EP3891460A1 (en) 2021-10-13
WO2020115367A1 (en) 2020-06-11
FI20186045A1 (en) 2019-12-13
HRP20241372T1 (en) 2024-12-20
ES2988687T3 (en) 2024-11-21
HUE068704T2 (en) 2025-02-28
EP3891460C0 (en) 2024-07-10
PL3891460T3 (en) 2024-10-28
CA3121729A1 (en) 2020-06-11
EP3891460B1 (en) 2024-07-10

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