WO2018189574A1

WO2018189574A1 - Gun comprising a hammer and a firing pin

Info

Publication number: WO2018189574A1
Application number: PCT/IB2017/052163
Authority: WO
Inventors: Dimitry STRESHINSKY
Original assignee: Arsenal Firearms Finance Limited
Priority date: 2017-04-14
Filing date: 2017-04-14
Publication date: 2018-10-18
Also published as: BR112019021544A2; US20210116198A1; AU2017408879A1; IL269951B; EP3610218A1; EA201992457A1; CN110998218A; PH12019502297A1; EP3610218B1; ZA201906511B; MX2019012123A; KR20200035233A; AU2017408879B2

Abstract

Gun (1) comprising a gun frame (2), a barrel (4) supported by the gun frame (2), a slide (8), translatable longitudinally in relation to the barrel (4), and at least a hammer (10), rotatably mounted with respect to the gun frame (2) so as to move at least a firing pin (12) of said gun (1) towards the barrel (4). A centreline plane (Z) crosses said gun (1) between opposite gun flanks (14, 16), and the rotation axis (R) of said hammer (10) lies in the centreline plane (Z) or is substantially parallel to said plane (Z).

Description

GUN COMPRISING A HAMMER AND A FIRING PIN

DESCRIPTION

[0001]. The present invention relates to a gun.

[0002]. Firing devices in semi-automatic "short recoil" guns usually comprise floating firing pins, or hammer- operated firing pins. E.g. document EP2603764 of the same applicant discloses a device of the former category.

[0003]. It is known that firearm with hammer-operated pins suffer from many drawbacks, and in particular have problems of accidental discharge when the weapon is dropped .

[0004] . The presented gun with its improved hammer system sets out to resolve at least the aforementioned problems, in particular by proposing a gun with a more secure and reliable rotating hammer system.

[0005] . Such objective is achieved by a gun according to claim 1. The dependent claims show preferred embodiment variations.

[0006]. The present invention will now be described in detail, with the help of the attached drawings, wherein: figures 1, 2 show respectively a partially cross- sectioned perspective view of a slide and frame assembly, and a corresponding perspective view of a hammer system of the present invention, according to a possible embodiment; - figures 3, 4 show upper views of a gun of the present invention, according to a possible embodiment, wherein the slide is partially sectioned and wherein such figures show different positions of the hammer and of the firing pin;

- figures 5, 6 show longitudinally-sectioned perspective views of a slide and frame assembly of the present invention, in the positions corresponding to figures 3 and 4 respectively;

- figures 7, 8 show views of the gun of this invention from a proximal back view, wherein parts of the frame and of the slide are omitted for clarity, in two possible positions of the hammer.

[0007]. With reference to the aforementioned drawings, reference numeral 1 globally denotes a gun.

[0008] . According to possible embodiments, gun 1 is a semi-automatic handgun, or an automatic handgun (i.e. suitable for firing volleys of bullets) .

[0009] . According to an embodiment, gun 1 is a short recoil gun.

[0010] . The gun 1 comprises a gun frame 2, a barrel 4 supported by the gun frame 2, a slide 8 translatable longitudinally in relation to the barrel 4 and at least a hammer 10.

[0011]. In the present description, the expression "longitudinal" will be referred to a direction X along the barrel 4.

[0012] . According to an embodiment, the barrel 4 supported by the gun frame 2 in a longitudinally movable manner so as to allow barrel 4 to recoil.

[0013] . According to an embodiment, the gun 1 comprises a trigger (omitted from the drawings) mounted to the gun frame 2 in a rotatable or in a translatable manner, and configured for being pressed by a user for firing a bullet.

[0014] . As shown in figure 3, a centreline plane Z crosses the gun 1 between opposite gun flanks 14, 16.

[0015] . In other words, centreline plane Z is a plane dividing the thickness of gun 1 in two nearly mirror- symmetrical halves.

[0016] . Hammer 10 is rotatably mounted with respect to the gun frame 2 so as to move at least a firing pin 12 of the aforesaid gun 1 towards the barrel 4, in a distal direction .

[0017]. Within this patent specification, the term "distal" will be used to indicate the components positioned towards a gun's muzzle 54; on the contrary, the expression "proximal" will be taken to mean the components of the gun positioned near or towards the opposite and backward extremity 58 of gun 1. [0018] . As far as the structure of the barrel 4 is concerned, according to an embodiment it proximally delimits a firing chamber 6. Such chamber is configured for at least partially housing a cartridge.

[0019] . According to an embodiment, firing pin 12 is movable towards the firing chamber 6 by means of a firing device, comprising hammer 10 and activated by the trigger .

[0020] . According to an embodiment, the firing pin 12 is housed in the slide 8 so as to be movable longitudinally in a slide seat 62.

[0021] . According to an embodiment, the firing pin 12 crosses an inner wall 64 of the slide 8 (through a pin opening 66), thereby being configured to project towards and within the firing chamber 6.

[0022] . According to an embodiment, the barrel 4 distally opens towards the muzzle 54, and advantageously delimits an internal rifling 56, for example clockwise- or anticlockwise-oriented.

[0023] . According to an embodiment, the slide is 8 slidable / translatable longitudinally in relation to the barrel 4 between a forward configuration wherein the slide closes the firing chamber 6, and a rearward configuration wherein slide 8 is distanced from a proximal mouth 60 of the firing chamber 6, to open the latter .

[0024]. According to the invention, the rotation axis R of the hammer 10 lies in the centreline plane Z or is substantially parallel to said plane Z.

[0025] . According to an embodiment, the barrel 4 extends along the longitudinal direction X, in a substantially tubular manner.

[0026] . According to an embodiment, the rotation axis R is substantially perpendicular to the longitudinal direction X.

[0027] . According to an embodiment, the rotation axis R is substantially perpendicular to the longitudinal direction X in a lateral view, taken from one of the gun flanks 14, 16 in an orthogonal direction to the centreline plane Z.

[0028] . According to an embodiment, the hammer 10 is integral with the slide 8 during the translational movement of the latter.

[0029] . According to an embodiment, the hammer 10 is hingedly connected to said slide 8.

[0030] . According to an embodiment, gun 1 comprises a rotation pin 18 of the hammer 10, extending along the rotation axis R and at least partially housed in the thickness of a slide wall 22.

[0031] . According to an embodiment, such slide wall 22 is a wall delimiting the slide in an "upward" direction with reference to gun orientation shown in figure 1.

[0032] . According to an embodiment, the slide wall 22 delimits a rotation bore 20 wherein the rotation pin 18 is partially inserted, e.g. in a rotatable manner.

[0033]. According to an embodiment, the rotation bore 20 passes completely through the thickness of slide wall 22, and is open towards a top surface 24 of the slide 8 (e.g. so as to enable lubrication operations) .

[0034] . According to an embodiment, the hammer 10 is completely housed within a slide compartment 26 of the slide 8, in each angular position thereof.

[0035]. According to an embodiment, the slide compartment 26 is delimited at least in part by the gun frame 2, e.g. in a position opposite to slide wall 22.

[0036]. According to an embodiment, the slide compartment 26 is delimited by slide wall 22 and by lateral walls 68, 72 of said slide 8, connected and extending from slide wall 22 substantially at right angles.

[0037] . According to an embodiment, hammer 10 has generically or substantially the shape of a solid of revolution .

[0038] . According to an embodiment, in a plane substantially perpendicular to rotation axis R, hammer 10 has a substantially circular cross-section.

[0039] . According to an embodiment, gun 1 comprises elastic means 28 forcing constantly the hammer 10 towards a firing position (shown in figure 6), and at least a retention member 30 for mechanically retaining the hammer 10 in an armed position (shown in figure 5) in contrast to the force exercised by the elastic means 28.

[0040]. According to an embodiment, retention member 30 is movable by means of the trigger for releasing the hammer 10 towards the firing position.

[0041] . According to an embodiment, in the firing position, the firing pin 12 partially projects into the firing chamber 6, whereby orientation of such chamber 6 remains substantially parallel to the longitudinal direction X in every moment of the firing cycle of the present gun 1.

[0042] . In other words, in this embodiment the firing chamber does not undergo tilting movements as in many prior art firearms.

[0043] . According to an embodiment, gun 1 comprises elastic means 28 engaged between slide 8 and a first engagement element 32 of the hammer 10.

[0044]. According to an embodiment, the elastic means 28 comprise a helical spring.

[0045]. According to an embodiment, the elastic means 28 are in a pre-compressed condition between the slide 8 and the first engagement element 32.

[0046]. According to an embodiment, the elastic means 28 comprise opposite anchoring elements 74, 76 respectively connected to slide 8 and to the first engagement element 32.

[0047]. According to an embodiment, a first anchoring element 74 is substantially fork-shaped.

[0048]. According to an embodiment, a first anchoring element 74 is partially housed in the thickness of slide 8, and more precisely within the inner wall 64.

[0049]. According to an embodiment, a second anchoring element 76 comprises an annular-shaped portion 78 so as to house at least part of the first engagement element 32.

[0050] . According to an embodiment, the firing pin 12 is urged by a second engagement element 34 of the hammer 10 towards the barrel 4.

[0051] . According to an embodiment, the first 32 and the second 34 engagement elements are eccentrically positioned in relation to the rotation axis R.

[0052] . According to an embodiment, the first 32 and the second 34 engagement elements project from opposite surfaces 44, 46 of a hammer body 36.

[0053]. More precisely, said surfaces 44, 46 are located one above and one below an intermediate orthogonal plane of said body with respect to rotation axis R.

[0054] . According to an embodiment, the first 32 and the second 34 engagement element each comprise an element pin developing substantially parallel to the rotation axis R.

[0055]. According to an embodiment, the second anchoring element 76 is mounted coaxially to the element pin making the first engagement element 32.

[0056]. According to an embodiment, the first engagement element 32 and/or the second engagement element 34 are located in a sector-shaped depression 48 of the hammer 10 angularly delimited by hammer surfaces 50, 52.

[0057]. According to an embodiment, rotation of the hammer 10 brings alternatively one of said hammer surfaces 50, 52 in abutment with (or in correspondence of) the elastic means 28 and/or in abutment with (or in correspondence of) the firing pin 12 so as to determine end-stroke positions of the hammer 10.

[0058]. According to an embodiment, the hammer surfaces 50, 52 extend axially along the rotation axis R.

[0059] . According to an embodiment, the firing pin 12 comprises a pin body 38 connected with the hammer 10, and a pin tip 40 extending distally towards the barrel 4.

[0060] . According to an embodiment, pin body 38 and pin tip 40 are made in one piece of the same material.

[0061] . According to an embodiment, pin body 38 and hammer 10 are connected by means of a cam mechanism.

[0062] . According to an embodiment, the pin body 38 delimits a pin slot 42 wherein the second engagement element 34 or a second element pin is partially lodged.

[0063]. According to such embodiment, the surfaces delimiting pin slot 42 make cam surfaces for moving the pin tip 40 towards, and for distancing the pin tip 40 from, the barrel 4.

[0064] . According to an embodiment, gun 1 comprises a locking device 70 that - in the forward configuration - secures barrel and slide (in particular in order to make them together) , and that - in the rearward configuration - releases slide 8 to enable an independent (proximal or backward) movement thereof, to open the firing chamber 6.

[0065]. In other words, locking device 70 is configured for mechanically constraining / releasing barrel and slide, when gun 1 fires a bullet.

[0066]. According to an embodiment, the locking device 70 could be made according to the teaching of document EP2603764, or of document PCT/IB2016/052242, both in the name of the same applicant of the present invention. [0067]. As already mentioned, movement of trigger 10 from the armed position to the firing position (in a counter-clockwise direction according to figure 3) is a consequence of the force exercised by the elastic means 28 as soon as hammer 10 is released by the trigger- operated retention member 30.

[0068] . As far as the opposite movement is concerned

(that happens after firing the bullet) , and according to a possible embodiment, trigger 10 and gun frame 2 each comprise mating surfaces (not shown) that, when slide 8 moves from the backward configuration to the forward configuration, exert a restoring force on the trigger 10 so as to move it in the armed position against the

(smaller) force of the elastic means 28, in a clockwise direction according to figure 4. In such a position, the retention member 30 is once more in a condition to catch the hammer and maintain it in the armed position.

[0069]. Innovatively the gun which the present invention relates is suitable for brilliantly overcoming the mentioned prior art drawbacks.

[0070]. Advantageously, the gun which the present invention relates to is extremely well-balanced thereby maintaining a high level of shooting accuracy in quick fire, and even in firing volleys for some variants.

[0071]. Advantageously, the described hammer system makes it possible to reduce the overall dimensions of the firearm and of the slide due to the rational positioning of the gun components.

[0072]. Also, advantageously, the present gun allows to reduce the mechanical stresses between the moving parts.

[0073]. Advantageously, the gun which the present invention relates to is suitable for being produced in an extremely economical manner.

[0074]. Advantageously, the gun which the present invention relates to allows to reduce vertical forces during firing, thereby improving the overall shooting accuracy.

[0075]. Advantageously, the gun which the present invention relates to allows to make maintenance operations easier than traditional weapons.

[0076]. Advantageously, the gun which the present invention relates to allows to perform fast maintenance operations without disassembling the gun.

[0077]. Advantageously, the gun which the present invention relates to has a hammer completely housed in the slide, so as to avoid any possible defective functioning due to the contact with external objects.

[0078]. Advantageously, the described hammer system has a small inertia, thereby reducing disturbing factors on the shooting accuracy. [0079]. Advantageously, the gun which the present invention relates to allows to achieve fail-safe positions of the hammer in the armed and in the firing configurations .

[0080]. Advantageously, the gun which the present invention relates to avoids striking the firing pin, whereas the latter is smoothly guided in every position by the mechanical connection with the hammer.

[0081] . A person skilled in the art may make variations to the embodiments of the gun described above or replace elements with others functionally equivalent so as to satisfy specific requirements.

[0082]. Such variations are also contained within the sphere of protection as defined by the following claims.

[0083]. Moreover, each of the variants described as belonging to a possible embodiment may be realised independently of the other variants described.

Claims

1. Gun (1) comprising:

- a gun frame (2) ;

- a barrel (4) supported by the gun frame (2) ;

- a slide (8), translatable longitudinally in relation to the barrel ( 4 ) ;

- at least a hammer (10), rotatably mounted with respect to the gun frame (2) so as to move at least a firing pin (12) of said gun (1) towards the barrel (4);

wherein a centreline plane (Z) crosses said gun (1) between opposite gun flanks (14, 16);

said gun (1) being characterized in that the rotation axis (R) of said hammer (10) lies in the centreline plane (Z) or is substantially parallel to said plane (Z) .

2. Gun according to claim 1, wherein the barrel (4) extends along a longitudinal direction (X) , the rotation axis (R) being substantially perpendicular to the longitudinal direction (X) .

3. Gun according to any of the previous claims, wherein the hammer (10) is integral with the slide (8) during the translational movement of the latter, and is hingedly connected to said slide (8) .

4. Gun according to any of the previous claims, comprising a rotation pin (18) of the hammer (10), extending along the rotation axis (R) and at least partially housed in the thickness of a slide wall (22) .

5. Gun according to the previous claim, wherein the slide wall (22) delimits a rotation bore (20) wherein the rotation pin (18) is partially inserted, said bore (20) passing completely through the thickness of said wall (22) and being open towards a top surface (24) of the slide (8), e.g. so as to enable lubrication operations.

6. Gun according to any of the previous claims, wherein the hammer (10) is completely housed within a slide compartment (26) of the slide (8), in each angular position thereof, said compartment (26) being delimited at least in part by the gun frame (2) .

7. Gun according to any of the previous claims, wherein the hammer (10) has generically or substantially the shape of a solid of revolution.

8. Gun according to any of the previous claims, comprising elastic means (28) forcing constantly the hammer (10) towards a firing position (Fig. 6), and at least a retention member (30) for mechanically retaining the hammer (10) in an armed position (Fig. 5) in contrast to the force exercised by the elastic means (28), said retention member (30) being movable by means of a trigger for releasing said hammer (10) towards the firing position .

9. Gun according to any of the previous claims, comprising elastic means (28) engaged between the slide (8) and a first engagement element (32) of the hammer (10), and wherein the firing pin (12) is urged by a second engagement element (34) of the hammer (10) towards the barrel ( 4 ) .

10. Gun according to the previous claim, wherein the first (32) and the second (34) engagement elements are eccentrically positioned in relation to the rotation axis (R) .

11. Gun according to claims 9 or 10, wherein the first (32) and the second (34) engagement elements project from opposite surfaces (44, 46) of a hammer body (36), said surfaces being located one above and one below an intermediate orthogonal plane of said body with respect to the rotation axis (R) .

12. Gun according to claims 9-11, wherein the first (32) and the second (34) engagement element each comprise an element pin developing substantially parallel to the rotation axis (R) .

13. Gun according to claims 9-11, wherein the first engagement element (32) and/or the second engagement element (34) are located in a sector-shaped depression (48) of the hammer (10) angularly delimited by hammer surfaces (50, 52), rotation of the hammer (10) bringing alternatively one of said surfaces in abutment with the elastic means (28) and/or with the firing pin (12) so as to determine end-stroke positions of the hammer (10) .

1 . Gun according to the previous claim, wherein the hammer surfaces (50, 52) extend axially along the rotation axis (R) .

15. Gun according to any of the previous claims, wherein the firing pin (12) comprises a pin body (38) connected with the hammer (10), and a pin tip (40) extending distally towards the barrel (4), the pin body (38) and the hammer (10) being connected by means of a cam mechanism.

16. Gun according to claims 9-14 and according to claim 15, wherein the pin body (38) delimits a pin slot (42) wherein the second engagement element (34) or a second element pin is partially lodged, and wherein the surfaces delimiting said slot (42) make cam surfaces for moving the pin tip (40) towards, and for distancing the pin tip (40) from, the barrel (4) .

17. Gun according to claim 8, wherein the barrel (4) proximally delimits a firing chamber (6) and wherein, in the firing position, the firing pin (12) partially projects into said chamber (6), orientation of the firing chamber (6) being substantially parallel to a longitudinal direction (X) in every moment of the firing cycle of said gun (1) .

18. Gun according to any of the previous claims, characterized by the fact of being a semi-automatic or an automatic handgun.