The present description relates generally to a firearm and methods for manufacture and operation of a firearm.
Civilian gun owners use firearms for a variety of purposes such as self-defense, hunting, target shooting, competitions, collecting, etc. Breech loading rifles are popular amongst many gun owners due to their quick and reliable cartridge loading action. One such breech-loading rifle that has gained in popularity in recent years is the Martini-Henry rifle. The Martini-Henry rifle is highly sought after and collectable and is likely to continue increasing in popularity. Martini-Henry rifles have in the past, required multiple pins to be knocked out of the action body to breakdown the action. Knocking the pins out requires the use of special tools such as a hammer and punch due to the pin's interference fit, increasing disassembly time and effort. Furthermore, each pin retains a separate component in the action, requiring each component to be precisely aligned during reassembly, resulting in a tedious and laborious reassembly process.
Previous Martini-Henry rifles also include a threaded striker stop and screw for retaining the striker assembly in a desired position. Specifically, the classic Martini-Henry rifle has a stop nut retaining the striker and striker spring in the block. This stop nut threads into the block along with a stop nut locking screw, working against the stop nut and preventing the stop nut from unthreading. To remove the striker and striker spring in the classic Martini-Henry rifle design, two screwdrivers of different sizes are required. It is therefore time consuming to remove the striker, due to the specific tools needed to remove the threaded striker stop and screw, further exacerbating assembly/disassembly difficulties.
Prior Martini-Henry rifles also require a complex action manufacturing process. In prior Martini-Henry rifles, a rounded post included in the action body allows parts of the action to be removed from the action body. However, it is difficult and costly to cast or machine the post into the action body, due to the complex geometric profile of the action body, thereby driving up manufacturing costs.
Additionally, prior Martini-Henry rifle blocks include a pivot pin enclosure mating with a pivot pin. The pivot pin allows the block to move into a loading configuration where a cartridge can be inserted into a rear of the barrel and cocked configuration where a striker pin in the block is aligned with a cartridge in the barrel. However, the pivot pin serves as the sole interface between the action body and the breech. Therefore, the load path resulting from a cartridge discharge travels directly through the pivot pin and then to the action body in such a configuration. The pivot pin may have, at the time when the Martini-Henry rifle was originally designed, been strong enough to receive loads generated by black powder. However, modern smokeless power generates much more force than black powder. As such, Martini-Henry rifles using smokeless powder cartridges may damage the block pivot pin due to the localized load distribution on the pin.
Furthermore, the classic Martini-Henry rifle's lever typically has a catch hook on the butt end of the lever that is captured by an accommodating steel lever catch block mounted in the butt stock. The lever in this classic design has sharp edges on the butt end of the lever that can scrape or scratch a user's hand. The classic design also makes an undesirable noise when the lever is brought into the closed position and as it engages the lever catch block. The catch hook also presents more manufacturing difficulties.
Martini-Henry rifles and other breech loading rifles have also suffered from inaccuracy problems caused by thermal expansion of the barrel. For example, when repeated firearm discharge produces thermal expansion of the barrel, the dimensions of the barrel grow to a point where the barrel impinges against the forearm. When this occurs, the barrel can be forced in the opposite direction of the impingement, causing the impact point of the projectile to move from its zeroed point. The variance of pressure against the forearm can also alter the inherent harmonic vibration of the barrel also causing accuracy issues. Another source of accuracy issues can arise when a forearm is rigidly affixed to both the barrel and the action. When the forearm is attached in this manner, the variation in thermal expansion of the barrel and forearm can work against the action and put undesirable force on the barrel.
The inventors herein have recognized the issues described above and designed a firearm with assembly/disassembly features and methods for firearm manufacturing to at least partially overcome the aforementioned issues. The assembly/disassembly features facilitate fast and efficient assembly and disassembly of the firearm. For example, the firearm described herein may be broken down in a less than a minute when compared to 5-10 minutes for previous Martini-Henry rifles. Additionally, the manufacturing methods increase manufacturing efficiency to drive down manufacturing costs.
In another example, the firearm may include a disassembly latch allowing for efficient removal of the action assembly from the action body. The disassembly latch is positioned at a front side of the action assembly and includes a protrusion mating with a recess in the action body when the disassembly latch is in a latched configuration. In an unlatched configuration, the protrusion in the disassembly latch is spaced away from the recess. In this way, a user is able to efficiently disconnect the action assembly from the action body. Consequently, the firearm may be more quickly assembled and disassembled when compared to previous rifles requiring multiple pins to be knocked out of the action during breakdown. In one example, the disassembly latch may only be actuated when an extractor in the action assembly is in an extraction position. In this way, the likelihood of unwanted disassembly latch actuation is reduced.
The firearm may also include, in one example, a trigger guard support pin separately manufactured from the action assembly and then subsequently press fit into the action body. In this way, manufacturing efficiency of the action body is increased when compared to previous action body designs requiring a post to be cast or machined into the action body.
In yet another example, the firearm may include a removable block support laterally positioned between two walls of the trigger guard. The removable block support is designed to receive firing forces from the block and transfer said forces to the back of the action body. In this way, the removable block support allows forces to be transferred to a stronger area of the action and relieves unnecessary loading on the block pivot pin. As a result, firing forces may be dispersed through a controlled path to alleviate stresses on weaker components. Therefore, the likelihood pivot pin damage, caused by repeated loading, is considerably reduced. The removable block support may be replaced if damaged by an over pressure situation, and may prevent the need to replace the firearm action. The removable block support may also increase manufacturing efficiency by eliminating the step of machining the detail into the inside back of the action.
The firearm may also include a removable striker stop pin securing the striker assembly in a desired position. The removable striker stop pin allows the striker assembly to be more efficiently assembled/disassembled when compared to previous striker assembly designs including a threaded stop pin and screw requiring tools to insert and remove the threaded pin. The removable striker stop pin also increasing manufacturing efficiency by eliminating the need to machine threads into the block and striker stop, if desired.
In another example, the firearm may include a spring loaded catch plunger in the removable block support designed to dampen or in some cases eliminate the impact between the lever and a stock during lever actuation. In this way, unwanted noise and vibration occurring during firearm reloading is reduced and in some cases eliminated.
The firearm may also include a gap between the action body and the forearm to accommodate thermal expansion of the barrel during use of the firearm, in one example. A forearm lug and mounting screw coupling the forearm to the barrel allow the gap to be formed between the barrel and the forearm, in one example. Additionally, the gap between the action body and the forearm may be created by a forearm bracket attached to a front side of the action body and a rear side of the forearm. In such an example, the forearm bracket may also be enclosed via a compliant material (e.g., rubber). The compliant material reduces the change of damage to forearm caused by external forces and provides acoustic dampening during firearm discharge.
It should be understood that the summary above is provided to introduce in simplified form, a selection of concepts that are further described in the detailed description. It is not meant to identify key or essential features of the subject matter. Furthermore, the disclosed subject matter is not limited to implementations that solve any disadvantages noted above or in any part of this disclosure.
The following description relates to a firearm, such as a breech loading firearm (e.g., Martini-Henry style rifle). The firearm may be designed with several safety features decreasing the likelihood of unwanted firearm discharge as well as features for efficient assembly/disassembly of the action and other firearm components. The firearm may also be designed with features allowing for quick and efficient assembly/disassembly of the action. Additionally, the firearm may have several design features enabling simplified and efficient manufacturing of the action body and action. The firearm may also have several design features mitigating barrel and action body misalignment caused by thermal expansion of the barrel. The firearm may also include a dampening mechanism for reducing (e.g., eliminating) impacts between the lever and stock during lever cocking.
In one example, the firearm safety features may include a trigger block with a flange on a rear side of the trigger. The trigger block prevents the trigger from being actuated when a lever in the action is in a partially cocked position. In this way, the firearm may only be fired when the lever is in a desired position. As a result, firearm safety is increased.
The safety features may also include a safety mechanism positioned in front of the trigger in a trigger guard. The safety lever includes a safety lever pivoting about a fulcrum and an angled face selectively inhibiting trigger movement. As such, the safety lever, in a first position, blocks the trigger from being actuated and, in a second position, allows the trigger to be actuated. In this way, firearm safety is further increased by allowing a user to selectively deactivate the trigger. Furthermore, by positioning the safety mechanism in front of the trigger and integrating the mechanism into the trigger guard the mechanism can be efficiently actuated, increasing operational efficiency of the firearm.
In one example, the action assembly may include a disassembly latch. When actuated, the disassembly latch allows the action assembly to be efficiently removed from the action body. The disassembly latch may be positioned at a front side of the action assembly. A latching protrusion in the latching assembly engages and disengages with a latching face in the action body. When the latching assembly is disengaged the action assembly pivots about a trigger guard support pin at a rear side of the action assembly. In one example, the action assembly may be removed in one-piece, further increasing assembly/disassembly efficiency.
In another example, the action body may include a trigger guard support pin press fit into an opening in the action assembly. The trigger guard support pin allows the action assembly to be smoothly removed from the action body. Separately manufacturing the trigger guard support pin and pressing the pin into an opening in the action body simplifies action body manufacturing when compared to an action body cast or machined as a single component with a curved post.
In another example, the action body may include a removable block support laterally positioned between sections of a trigger guard. The removable block support is designed to receive firing loads from the block and transfer the loads to the action body. In this way, the removable block support allows forces to be transferred to a stronger area of the action, relieving unnecessary loading on the block pivot pin. As a result, firing forces may be dispersed through a controlled path to reduce the likelihood of block pivot pin damage caused by localized pin loading. Pins may be used to attach the removable block support to the trigger guard, in one example. It will be appreciated that the removable block support may be separately manufactured from the trigger guard. Consequently, manufacturing of the action assembly may be simplified, thereby decreasing manufacturing costs.
In yet another example, the block may include a removable striker stop pin extending laterally through a striker stop to retain the striker stop in a desired position in the block. Providing a removable striker stop pin in the action assembly allows for efficient disassembly of the striker sub-assembly when compared to previous techniques utilizing screws and nuts to retain the striker stop in a desired position.
In another example, the action assembly may include a spring loaded catch plunger in the block support designed to dampen and, in some instances, prevent the lever from directly contacting the stock when the lever is in a cocked position. In this way, unwanted noise and vibration caused by the lever slamming into the stock during lever actuation can be reduced (e.g., eliminated).
In another example, the firearm may be designed with gaps between the barrel and forearm and/or the forearm and the action body. The gaps accommodate thermal expansion of the barrel, to reduce movement between the forearm and barrel, thereby decreasing firing inaccuracies. In such an example, a forearm screw may be used to attach the barrel to the forearm and a forearm bracket may be used to attach the forearm to the action body to create the gaps. In one instance, a compliant bushing (e.g., rubber bushing) may be used to attached the forearm to the action body to reduce the likelihood of damage to the forearm, caused by external forces and provide acoustic dampening during firearm discharge.
Turning now to
An axis system 150 including three axes: axis 152 (e.g., longitudinal axis), axis 154 (e.g., vertical axis), and axis 156 (e.g., lateral axis), is provided in
As shown in
The stock 106 is connected to an action assembly 108 via a bolt 110. However other suitable attachment mechanisms have been envisioned including but not limited to welds, press fit pins, adhesive, clamps, pins and slots, combinations thereof, etc.
The firearm 100 further includes a barrel 112 and a forearm 114 coupled to the barrel. The barrel 112 includes a housing 116 whose interior surface 117 defines a boundary of a bore 118. A user may grip the forearm 114 during use of the firearm. The forearm 114 and the stock 106 may be discrete sections spaced away from one another, in one example. While in other examples, the forearm 114 and the stock 106 may be formed from a continuous piece of material.
The barrel 112 is designed to guide a projectile (e.g., bullet, shot, slug, etc.) in a desired direction. It will be appreciated that the projectile may be packaged in a cartridge including propellant (e.g., gunpowder), an ignition device (e.g., primer), and a case. When the firearm 100 is loaded, the cartridge resides in a chamber 120 of the barrel's bore 118. As such, the cartridge may be inserted into a rear end 122 of the barrel 112, during cartridge loading. When fired, the projectile exits the barrel 112 at a muzzle (i.e., the front end of the barrel). It will be appreciated that accessories such as a sight, optical scope, laser sight, silencer, etc., may be coupled to the barrel 112.
The barrel 112 is shown attached to an action body 123 that may be included in the action assembly 108. Specifically, the barrel 112 is shown threaded into the action body 123. However, additional or alternative attachment techniques may be used to couple the barrel 112 to the action body 123, such as pins, welds, press fitting, combinations thereof, etc.
The action assembly 108 of the firearm 100 is designed to load, lock, fire, extract and/or eject a cartridge from the chamber 120. The action assembly 108, in the illustrated example, is a breech loading single shot type assembly. That is to say that the firearm is designed to have a single cartridge loaded into the rear of the barrel and is also designed to release a striker 124 each time a trigger 126 is pulled and fire the single cartridge loaded in the barrel 112. However, the features of the firearm 100 described herein may be applicable to other types of actions such as single actions (e.g., rolling block actions, hinged block actions, etc.), break actions, bolt actions, repeating actions (e.g., repeating bolt actions, revolving actions, pump actions, lever actions, lever release actions, etc.,) autoloading actions (e.g., blockback actions, recoil actions, gas actions, etc.), etc. A trigger guard 129, is also shown in
A lever 128 in the action assembly 108 allows the firearm 100 to be placed in a cocked configuration and a loading configuration. Thus, the lever 128 may be rotated about axis 130 to place the lever 128 in the loading position and the cocked position as well as positions there between. The positions there between may be referred to as partially cocked positions. Specifically, to place the lever 128 in the loading position the handle is moved away from the stock 106 in a first rotational direction 134. On the other hand, to place the lever 128 in the cocked position a handle 132 of the lever 128 is moved toward the stock 106 in a second rotational direction 136 opposing the first rotational direction 134. The handle 132 includes an upper surface 138 facing the stock 106 as well as a lower surface 140 facing away from the stock 106. Furthermore, the handle 132 may be curved or otherwise contoured to facilitate ergonomic actuation of the lever 128.
During loading of the firearm 100, the lever 128 is moved from the cocked position to the loading position. Cocking the lever 128 places the action assembly 108 in a cocked configuration where actuation of the trigger 126 will cause the firearm 100 to discharge a projectile.
In the firearm's cocked configuration, shown in
Additionally, the trigger 126 may be included in a trigger sub-assembly 148 of the action assembly 108 allowing the firearm 100 to be actuated. On the other hand, in a loading configuration the block 146 in the action assembly 108 is moved downward to allow a cartridge to be inserted into a rear end of the barrel 112. Thus, in the loading configuration the striker 124 is not aligned with the barrel 112. The action body 123 also may include an extractor 160 allowing a spent cartridge to be ejected from the rear end of the barrel 112, in some examples. The extractor 160 functions to engage a flange of a cartridge case to remove the cartridge from the action body. When the block 146 is rotated to its fully counterclockwise position, the bottom face of the block contacts the extractor 160 causing the extractor to rotate counterclockwise.
The stock 106 may be constructed out of a wooden material (e.g., walnut, maple, myrtle, birch, oak, laminated wood, etc.), a polymeric material, combinations thereof, etc., in some examples. The action assembly 108 may be constructed out of a metal (e.g., steel, aluminum, etc.), a polymeric material, combinations thereof, etc., in some examples. For instance, certain components may be constructed out of metal while others may be constructed out of a polymer. Still further in other examples, the action assembly 108 may be constructed solely out of metal. Further in one example, the forearm 114 may be constructed out of a wooden material (e.g., walnut, maple, myrtle, birch, oak, laminated wood, etc.), a plastic material, combinations thereof, etc. The barrel 112 may be constructed out of a metal such as carbon steel or stainless steel, in some examples. Additionally, the action body 123 may be constructed out of a metal (e.g., steel, aluminum, etc.), in one example.
The sear 144 and trigger 126 are designed to pivot about a common axis 202, in the illustrated example. However, in other examples, the sear 144 and the trigger 126 may not pivot about a common axis. Furthermore, the sear 144 is designed to rotate in a clockwise direction by a desired amount (e.g., 5 degrees) independent of rotation of the trigger 126, in the illustrated example. The independent rotation allows the trigger block feature to be achieved due to the sear and trigger actuation kinematics. Specifically, the tumbler 142 is allowed to engage with the sear 144 when the sear is independently rotated in a clockwise direction with regard to the trigger 126. However, it will be appreciated that rotation of the trigger 126 in a counterclockwise direction causes counterclockwise rotation of the sear 144, when the lever 128 is in a cocked configuration.
The lever 128 and the tumbler 142 also pivot about the common axis 130. In this way, the compactness of the action assembly 108 may be increased when compared to rifles with levers and tumblers that separately pivot. However, in other examples, the lever 128 and the tumbler 142 may not pivot about a common axis. Additionally, it will be appreciated that rotation of the lever 128 from a cocked position to a loading position causes rotation of the tumbler 142. The lever 128 generates tumbler 142 rotation via a top surface of the lower extension 210 in the lever pushing up on the bottom surface of the tumbler, rotating the tumbler in a counterclockwise direction, shown in
The trigger-blocking flange 206 further includes a planar upper surface 218 and planar lower surface 220 with the curved surface 212 positioned there between. Additionally, the trigger-blocking flange 206 is recessed from a lateral surface 222 of the trigger 126. However, other contours of the trigger-blocking flange 206 have been contemplated. It will be appreciated that the trigger-blocking flange 206 inhibits trigger actuation across a range (e.g., a partial range near the lever's fully cocked position, a partial range near the lever's loading position, the full range, etc.) of partially cocked lever positions.
When the lever 128 and tumbler 142 are in cocked positions the trigger 126 can be pulled to initiate firearm discharge. On the other hand, when the tumbler 142 is in the cocked position and the lever 128 is in a partially cocked position the trigger is inhibited from being pulled via the trigger-blocking flange 206 in the trigger block 200. Furthermore, when the lever 128 is in the loading position a user can reload a cartridge for subsequent discharge.
The handle 132 in the lever 128 allows a user to actuate the lever. The handle 132 extends along a length of the stock 106, shown in
When the tumbler 142 is in a disengaged position, rotation (e.g., counterclockwise) of the lever 128 towards the loading position from the cocked position causes rotation (e.g., counterclockwise rotation) of the tumbler 142. Thus, the tumbler 142 and the lever 128 rotate in unison during an initial stage of cocking.
As shown in
Subsequently, the lever 128 is rotated back into the cocked position, as shown in
Furthermore, the lever 128 includes an upper extension 602. It will be appreciated that when the lever travels through a cocking sequence the upper extension 602 interacts with the block 146, shown in
Furthermore, actuation of the trigger 126 causes the sear 144 to rotate, releasing the sear 144 from the tumbler 142. Releasing the tumbler 142 allows the tumbler to rotate clockwise and release the striker 124, shown in
As shown, the sear 144 is rotated clockwise to move the protrusion 502 of the sear 144 away from the recess 500 in the tumbler 142. When the sear 144 is moved away from the tumbler 142, the tumbler 142 will subsequently rotate in a clockwise direction causing the striker 124, shown in
As shown in
As shown in
A sear spring 806 is shown attached to a front side 808 of the sear 144 and to the trigger guard 129. Specifically,
Additionally, a rear surface 906 of the sear 144 is in contact with an upper face 908 of the trigger 126 in front of the trigger-blocking flange 206. This interface between the sear 144 and the trigger 126 causes the trigger to actuate the sear when rotated in the clockwise direction. Additionally, the rear surface 906 and the upper face 908 have a planar profile. However, other contours of these surfaces have been envisioned.
The trigger safety mechanism 1100 is positioned in front of the trigger 126, allowing the mechanism to be easily accessed. Consequently, the safety's operation efficiency may be increased. For instance, the trigger safety mechanism 1100 may be actuated by the forefinger of the user's shooting hand. However, safety mechanism layouts facilitating actuation of the mechanism by other fingers have been envisioned. As described herein, the front side of the firearm is a side of the firearm including the muzzle and the rear side of the firearm is a side of the firearm including a stock, butt, and/or handle.
Furthermore, the trigger safety mechanism 1100 may be at least partially integrated into the trigger guard 129, shown in
The trigger 126 includes a lever interface 1110 interacting with the safety lever 1112 to allow for actuation of the trigger when the trigger safety mechanism 1100 is in the fire position. Conversely, the lever interface and safety lever interact to inhibit actuation of the trigger when the trigger safety mechanism is in the safe position. It will be appreciated that the safety mechanism 1100 is in the fire position in
The safety lever 1112 includes a rear end 1114 having an angled surface 1116 interacting with an angled surface 1118 in the lever interface 1110 of the trigger 126 to facilitate the aforementioned safety functionality. Thus, in the safe position the angled surface 1116 is in contact with the angled surface 1118 shown in
Continuing with
The safety lever 1112 pivots about a fulcrum 1120. In the depicted example, the fulcrum 1120 is near the center of the lever. However, the fulcrum 1120 may be positioned closer to the rear end 1114 or a front end 1122 of the safety lever 1112, in other examples. Furthermore, the fulcrum 1120 may be parallel to the axis 154 (e.g., the vertical axis). However, other orientations of the fulcrum have been contemplated. The safety lever 1112 includes curved sections 1124 adjacent to the fulcrum 1120, in the illustrated example. The curvature of the safety lever 1112 allows the lever to be pivoted about the fulcrum 1120. It will be appreciated that the curved sections 1124 of the safety lever 1112 may mate with a fulcrum opening 2404 in the trigger guard 129, shown in
The safety lever 1112 further includes a top surface 1126, a bottom surface 1128, and lateral side surfaces 1130. In the illustrated example, the aforementioned surfaces are planar. However, other surface contours have been contemplated.
A portion of the front end 1122 of the safety lever 1112 mates with a detent 1132 in a safety button 1134. To elaborate, the detent 1132 includes lateral faces 1136 interacting with lateral side surfaces 1130 of the safety lever 1112.
The safety button 1134 includes lateral sides 1138 allowing the button to be laterally slid into a “safe” position and a “fire” position which in turn places the safety lever in the safe position and the fire position, respectively. The safety button 1134 is in the fire position in
It will be appreciated that the safety button 1134 may extend through the safety button opening 2402 in the trigger guard 129, shown in
Additionally, the lateral side surfaces 1130 in the safety lever 1112 are parallel to one another, in the example illustrated in
Furthermore, the lateral faces 1136 of the detent 1132 in the safety button 1134 are arranged at an angle 1300 with regard to one another. The angle 1300 may be between 5 and 30 degrees, in one example. However, other suitable angles or angle ranges have been contemplated. In this way, the detent 1132 is shaped to accommodate rotational movement of the safety lever 1112.
In the safe position, the angled surface 1118 of the lever interface 1110 in the trigger 126 is in face sharing or near face sharing contact with the angled surface 1116 in the rear end 1114 of the safety lever 1112. Thus, the gap between the angle surfaces is reduced (e.g., eliminated), preventing the trigger 126 from being actuated. However, when the firearm includes the trigger block 200, shown in
A safety plunger 1406 is also shown extending from a bottom side 1408 of the safety button 1134. The safety plunger 1406 functions to laterally guide the safety button 1134 in the trigger guard, during button actuation. The plunger 1406 is shown including a reduced diameter portion 1407 compactly accommodating the integration of a spring around the plunger. However, other plunger profiles may be used, in other examples.
Additionally, the safety button 1134 has a generally cylindrical shape, in the illustrated example. However, in other examples, the safety button may have a tapered shape, rectangular shape, square shape, etc.
The safety button 1134 includes recessions 1410 in the lateral sides 1138 to provide texture in the button to assist in actuation of the button. However, in other examples, the recessions 1410 may be omitted from the button design or other texturing may be provided on the lateral sides of the safety button 1134.
The disassembly latch 1600 is designed to allow for efficient removal of the action assembly 108 from the action body 123. Therefore, the disassembly latch significantly increases breakdown efficiency of the action assembly and action body when compared to previous firearm designs requiring multiple pins to be knocked out of the action assembly via a hammer to break down the assembly. Conversely, reassembly of the action may also achieve increased efficiency by using the disassembly latch 1600. Furthermore, the disassembly latch 1600 can be actuated without the use of tools, in some examples, further simplifying action assembly breakdown. Specifically, in one example, the disassembly latch 1600 allows the action assembly 108 to be removed in one piece. As such, a user may quickly break down the firearm for inspection, cleaning, repair, etc. However, in other examples, removal of the action assembly 108 subsequent to disassembly lever actuation may involve removing multiple sections of the action assembly 108.
The disassembly latch 1600 is rotatable about an axis 1602 and is spring loaded via a spring 1604. The spring therefore keeps the latch in a latched position. Rotation of the disassembly latch 1600 in a first direction 1606 places the disassembly latch 1600 in an unlatched position. On the other hand, rotation of the disassembly latch 1600 in a second direction 1608 opposing the first direction 1606 transitions the latch into a latched position. It will be appreciated that the disassembly latch 1600 is in the latch position in
The spring 1604 encloses a pin 1620 (e.g., lateral pin) of the disassembly latch 1600. A first end 1622 of the spring 1604 is retained by a spring detent 1624 in the extractor 160. A second end 1626 of the spring 1604 is retained by a shelf 1631 above the rear surface 1630) in the disassembly latch 1600.
An extractor pin 1632 is also shown in
Furthermore, the action assembly 108 in
Specifically,
In
Additionally, the trigger safety mechanism 1100 is shown in
Additionally, the block pivot pin 1640 is shown connecting the block 146 to the trigger guard 129. The block pivot pin 1640 extends through an opening in the block 146. It will be appreciated that the block pivot pin 1640 allows the block 146 to be rotated about an axis 2312 to place the block in the firing position, shown in
Again, the plurality of pins 2302 connecting the removable block support 2000 to the trigger guard 129, are shown. Additionally, the block pivot pin 1640 and the trigger guard support pin 1618 are illustrated.
Furthermore, the plurality of pins 2302 and the block pivot pin 1640, shown in
A striker stop pin 2812 is also shown in
The compliant material reduces the chance of damage to the forearm 114 caused by external forces (e.g., dropping the firearm) as well as provides acoustic dampening during firearm discharge. The forearm 114 is attached to the barrel 112 in the firearm 100. An attachment apparatus 3202 is used to attach the forearm 114 to the barrel 112. In the illustrated example, the attachment apparatus 3202 includes a forearm mounting lug 3204 and a forearm screw 3206 threading into the forearm mounting lug. However, other types of attachment apparatuses have been envisioned. The forearm mounting lug 3204 extends through an opening 3208 in the forearm 114 and includes a first end 3210 attached to an outer surface 3212 of the barrel 112.
The forearm mounting lug 3204, shown in
The forearm bracket 3200 sets a gap 3302 between the forearm 114 and the action body 123, as shown in
It will be appreciated that the gaps 3300 and 3302, shown in
At 3502 the method includes manufacturing a trigger guard support pin. In one example, the trigger guard support pin may be cast, machined, 3-D printed, etc. Further in one example, the pin may be cylindrical. However, other pin shapes may be used, in other examples.
Next at 3504 the method includes manufacturing an action body with a support pin opening. It will be appreciated that the support pin opening may have a profile allowing the trigger guard support pin to be inserted therein. The action body may be cast, machined, 3-D printed, etc.
At 3506 the method includes fitting the trigger guard support pin in the support pin opening. For instance, the trigger guard support pin may be press fit into the support pin opening. However, other suitable techniques for fitting the trigger guard support pin into the support pin opening have been contemplated.
At 3508 the method may include coining the trigger guard support pin on each lateral side of the pin. Coining involves precision stamping where the pin is subjected to a sufficiently high stress to induce plastic flow on the surface of the material. Coining has several benefits such as reducing surface grain size and hardening the surface of the pin while allowing metal deeper in the pin to retain its ductility and toughness and enlarging the lateral sides of the pin producing an extremely tight and tough interference fit between the pin and the action body. In other examples, step 3508 may not be included in the method.
At 3510 the method may include grinding and polishing the trigger guard support pin and the action body. In this way, the interface between the pin and the action body may be smoothed. However, in other examples, step 3510 may be omitted from the method.
Method 3500 allows the trigger guard support pin to be separately manufactured from the action body and then subsequently fitted into the action body. As a result, manufacturing efficiency of the action body may be increased when compared to an action body with a curved trigger guard support cast or machined therein. As a result, the cost of manufacturing the action body is driven down.
At 3602 the method includes manufacturing a removable block support. Manufacturing the removable block support may include machining, casting, combinations thereof, etc., the removable block support. The removable block support may include openings sized to receive pins.
Next at 3604 the method includes manufacturing a trigger guard separate from the removable block support. Manufacturing the trigger guard may include machining, casting, combinations thereof, etc., the trigger guard. The trigger guard may include two lateral walls spaced away from one another. The gap between the lateral walls is sized to mate with the removable block support. Additionally, the trigger guard may include an opening that is lined up with the openings in the removable block support.
Next at 3606 the method includes attaching the removable block support to the trigger guards via a plurality of pins extending through openings in the trigger guard and the removable block support. For example, a user may push the pins into the pin openings. Method 3600 allows the removable block support to be efficiently manufactured in conjunction with the trigger guard to decrease firearm manufacturing costs.
At 3702 the method includes placing the lever in an extracted configuration. Thus, the lever may be rotated away from the stock to allow for rotation of the block downward to allow the firearm to be in the cartridge extracted position, shown in
At 3704 the method includes depressing the disassembly latch. Depressing the disassembly latch rotates a latching protrusion in the latch away from a latching face in the action body. As such, the action assembly may be moved away from the action body.
At 3706 the method includes rotating the action assembly. In this way, the front of the action assembly may drop out of the action body, allowing for rapid and efficient removal of the action assembly.
At 3708 the method includes removing the action assembly from the action body. Removing the action assembly may include moving the removable block support away from the trigger guard support pin. As previously discussed, the action assembly may be removed as a single unit, in some examples. Consequently, action breakdown in the firearm may be simplified to increase firearm assembly/disassembly efficiency. Method 3700 therefore allows for quick and efficient disassembly of the action from the body. Furthermore, it will be appreciated that to assemble the action body with the action the method may be carried out in reverse.
The invention will further be described in the following paragraphs. In one aspect, a firearm is provided that comprises a safety mechanism including: an actuatable lever including a first side interacting with a lever interface in a trigger to inhibit actuation of the trigger in a safe configuration; and a safety button including a detent mating with a second side of the actuatable lever; where the actuatable lever is pivotable about a fulcrum in front of the trigger; and where actuation of the trigger causes firearm discharge.
In another aspect, a firearm is provided that comprises a trigger including a trigger blocking flange positioned on a rear side of the trigger; where the trigger blocking flange prevents actuation of the trigger when a lever in an action assembly is in a partially cocked configuration; where the lever is configured to be placed in a fully cocked position where a sear is engaged with a tumbler and a loading configuration where the action assembly is configured for projectile loading.
In another aspect, a firearm is provided that comprises a safety mechanism including an actuatable lever interacting with a lever interface in a trigger to prevent trigger actuation in a safe configuration; where the actuatable lever is pivotable about a fulcrum in front of the trigger; where the trigger includes a trigger blocking flange positioned on a rear side of the trigger; and where the trigger blocking flange prevents actuation of the trigger to cause projectile discharge in an action assembly when a lever in the actuation assembly is in a partially cocked configuration.
In another aspect, a firearm is provided that comprises a disassembly latch pivoting about a latch pin at a front of an action assembly; where the disassembly latch includes a protrusion mating with a latching face in an action body in a latched configuration; where in an unlatched configuration, the protrusion is spaced away from the latching face; where the action assembly, in a loading configuration, is configured to guide a projectile into a barrel; and where the action assembly, in a discharge configuration, a striker is aligned to strike the projectile in the barrel.
In another aspect, a method for operation of a firearm is provided that comprises placing a lever in an action assembly in an extracted configuration; depressing a disassembly latch in the action assembly; rotating the action assembly about a trigger guard support pin in an action body; and removing the action assembly from the action body.
In yet another aspect, a breech loading firearm is provided that comprises a disassembly latch pivoting about a latch pin at a front of an action assembly; where the disassembly latch includes a protrusion mating with a latching face in an action body in a latched configuration; where in an unlatched configuration, the protrusion is spaced away from the latching face and is configured; where the action assembly, in a loading configuration, is configured to guide a projectile into a barrel; and where the action assembly, in a discharge configuration, a striker is aligned to strike the projectile in the barrel.
In any of the aspects or combinations of the aspects, the actuatable lever may include a first angled surface and the lever interface includes a second angled surface and where the first angled surface and the second angled surface are arranged at a similar/corresponding angle as measured from a horizontal axis.
In any of the aspects or combinations of the aspects, in the safe configuration, the first angled surface and the second angled surface may be in face sharing contact and where in a discharge configuration the first angled surface is spaced away from the second angled surface.
In any of the aspects or combinations of the aspects, the safety mechanism may be at least partially enclosed in a trigger guard.
In any of the aspects or combinations of the aspects, the firearm may be a breech loading firearm including a breech loading action assembly.
In any of the aspects or combinations of the aspects, the firearm may further comprise a spring loaded plunger coupled to the safety button and configured to laterally guide the safety button during actuation of the safety button.
In any of the aspects or combinations of the aspects, the trigger may include a trigger blocking flange positioned on a rear side of the trigger and where the trigger blocking flange prevents actuation of the trigger when a lever in an action assembly is in a partially cocked configuration.
In any of the aspects or combinations of the aspects, the lever may be configured to be placed in a fully cocked position where a sear is engaged with a tumbler and a loading configuration where the action assembly is configured for projectile loading.
In any of the aspects or combinations of the aspects, the sear may be designed to independently rotate with regard to the trigger.
In any of the aspects or combinations of the aspects, the partially cocked position may be any lever position between the loading position and the fully cocked position.
In any of the aspects or combinations of the aspects, when the lever is in the fully cocked position, actuation of the trigger may cause release of the tumbler to discharge a projectile loaded in a barrel of the firearm.
In any of the aspects or combinations of the aspects, the firearm may further comprise a spring coupled to a sear collar and the sear and configured to exert a return force on the sear when the sear is rotated away from a neutral configuration.
In any of the aspects or combinations of the aspects, the firearm may be a breech loading firearm and the action assembly is a breech loading action assembly.
In any of the aspects or combinations of the aspects, the firearm may further comprise a safety mechanism integrated into a trigger guard and positioned in front of the trigger.
In any of the aspects or combinations of the aspects, the actuatable lever may include a first angled surface and the lever interface includes a second angled surface and where the first angled surface and the second angled surface are arranged at a similar/corresponding angle as measured from a horizontal axis and where in the safe configuration, the first angled surface and the second angled surface are in face sharing contact and where in a discharge configuration the first angled surface is spaced away from the second angled surface.
In any of the aspects or combinations of the aspects, the sear may be designed to independently rotate with regard to the trigger.
In any of the aspects or combinations of the aspects, the fulcrum may be integrated into a trigger guard.
In any of the aspects or combinations of the aspects, in the unlatched configuration the action assembly may pivot about a trigger guard support pin.
In any of the aspects or combinations of the aspects, the trigger guard support pin may be press fit into the action body.
In any of the aspects or combinations of the aspects, the action assembly may be removed as a single piece in the unlatched configuration.
In any of the aspects or combinations of the aspects, the action assembly may include a striker sub-assembly with the striker having a removable striker stop pin extending through a body of the striker.
In any of the aspects or combinations of the aspects, where the striker sub-assembly may be at least partially enclosed in an opening in a block.
In any of the aspects or combinations of the aspects, the action assembly may include a removable block pivot pin coupled to a block and configured to allow for rotation of the block during projectile loading via the action assembly.
In any of the aspects or combinations of the aspects, the action assembly may include a spring loaded catch plunger configured to mate with a detent in a lever configured to place the firearm in a cocked configuration and a loading configuration.
In any of the aspects or combinations of the aspects, the spring loaded catch plunger may be at least partially positioned in a removable block support.
In any of the aspects or combinations of the aspects, the firearm may further comprise a forearm bracket connecting the action body to a forearm positioned below a barrel, where a compliant bushing at least partially surrounds the forearm bracket.
In any of the aspects or combinations of the aspects, the firearm may be a breech loading firearm and the action assembly may be configured for breach loading.
In any of the aspects or combinations of the aspects, the disassembly latch may be positioned at a front side of the action assembly.
In any of the aspects or combinations of the aspects, the trigger guard support pin may be positioned adjacent to a rear side of the action assembly prior to removal of the action assembly from the action body.
In any of the aspects or combinations of the aspects, in the unlatched configuration the action assembly may pivot about a trigger guard support pin and where the trigger guard support pin is press fit into the action body.
In any of the aspects or combinations of the aspects, the action assembly may include a striker sub-assembly with a striker having a removable striker stop pin extending through a body of the striker; and/or a removable block pivot pin coupled to a block and configured to allow for rotation of the block during projectile loading via the action assembly.
In any of the aspects or combinations of the aspects, the action assembly may be removed as a single piece in the unlatched configuration.
In any of the aspects or combinations of the aspects, the firearm may be a Martini-Henry style rifle.
In any of the aspects or combinations of the aspects, the action assembly may include a spring loaded catch plunger configured to mate with a detent in a lever configured to place the breech loading firearm in a cocked configuration and a loading configuration and where the spring loaded catch plunger is at least partially positioned in a removable block support.
As used herein, the terms “approximately” and “substantially” is construed to mean plus or minus five percent of the range unless otherwise specified.
It will be appreciated that the configurations and/or approaches described herein are exemplary in nature, and that these specific embodiments or examples are not to be considered in a limiting sense, because numerous variations are possible. For example, the above technology can be applied to various types of rifles and other firearms. The subject matter of the present disclosure includes all novel and nonobvious combinations and sub-combinations of the various features, functions, acts, and/or properties disclosed herein, as well as any and all equivalents thereof.
This application claims priority to U.S. Provisional Application No. 62/780,120, entitled “FIREARM AND METHODS FOR OPERATION AND MANUFACTURE THEREOF,” filed Dec. 14, 2018, the entire contents of which is hereby incorporated by reference in its entirety for all purposes.
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Number | Date | Country | |
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20200248979 A1 | Aug 2020 | US |
Number | Date | Country | |
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62780120 | Dec 2018 | US |