Novel Improvements for KRISS-type Firearm and Magazines for these Firearms
The invention relates to improvements in the design and operating mechanisms in a KRISS-type firearm, or a firearm employing a mobile mass. In one aspect, the invention is an improved cocking lever assembly comprising a main pin provided with a tenon (9) at one end (E), with a supporting compression spring (5), a cocking button (3), and a retention means (4), attached to a mobile mass (1). This assembly allows direct activation of the mobile mass (1) by the action of the operator's force on the cocking lever. Advantageously, this cocking lever assembly can be mounted indiscriminately on the right or the left of the mobile mass (1) and therefore of the firearm, according to the user's preference. This cocking lever assembly combines certain safety criteria with the option of ambidextrous use often preferred in modern firearms.
This application claims priority benefit of Switzerland national application no. 02053/10 filed on 10 Dec. 2010. The entire contents is this application are specifically incorporated herein by reference.
FIELD OF INVENTIONThe novel devices of the invention are particularly relevant to the KRISS® type of weapon available through KRISS USA, Inc. (Virginia Beach, Va.). The operating principles of these firearms are described in a variety of a patent applications, one of which was filed in Switzerland on Jun. 7, 2002 as number 0975/02. This firearm, sold over the past several years in the United States under the name KRISS® Vector™ or Super V System®, features a cocking device which is somewhat complex and was inspired by prior assault rifles. The present invention relates to a novel, simplified ambidextrous cocking lever device for this weapon as well as an ambidextrous release assembly particularly useful for an extended magazine.
BACKGROUND FOR AND INTRODUCTION TO THE INVENTIONThe cocking lever device characterizing the invention advantageously replaces that of the KRISS® Vector™ or Super V System®. The present cocking device, which is simpler, more efficient, and less costly to produce, allows the cocking lever to be positioned on the right or left side of the weapon according to the user's preference. The operator can simply change the direction in which the lever is mounted on the mobile mass. With this novel device the user can activate the weapon's bolt mechanism directly, since the cocking lever is connected to the body of the mobile unit. The original Kriss-type weapon, as protected by its patent, features a mobile mass that moves substantially vertically and substantially perpendicular to the axis of its barrel. The cocking lever device that is the subject of the invention, now rigidly connected with the mobile mass, naturally follows this same movement. The cocking lever device is particularly easy to unmount, without requiring tools of any kind.
The KRISS® Vector™ or Super V System® falls in the category of rifles and machine pistols referred to as “with independent cocking lever.” The best-known of these firearms are the legendary “Uzi” and the MPS. With the cocking lever device characterizing the invention, the mobile mass/bolt assembly of the weapon can be maneuvered in any situation, and particularly when the weapon is not loaded, which is not possible with the current mechanism of the Kriss (or the previously cited weapons). In general and in one aspect, the invention addresses the commonly found loading problems in automatic firearms. When loading fails, it is necessary to maneuver the bolt mechanism and force the return thereof when the main spring has been unable to do so, and this maneuver is only possible in cases where the cocking lever is rigidly connected with the mobile mass (or with the bolt). Another advantage arising from the use of the present cocking lever is the ability to instantly inform the user of the firing capacity of the firearm. The position of the cocking lever essentially becomes an indicator of proper or improper closure of the mobile unit, a detail that is vitally important to the user in certain circumstances. By adapting the device characterizing the invention to a Kriss-type weapon or a weapon using such an operating principle, this weapon can incorporate all of the previously described advantages.
In a related aspect, the invention also comprises a mechanical device capable of retaining both a medium capacity magazine and a large capacity magazine in working position. This retention mechanism is advantageously designed such that a control button can be actuated by either a left-handed or right-handed user. Thus, modern standard magazine sizes (13 to 15 rounds on average) as well as much larger capacity magazines (25 to more than 32 rounds) can both be used. In addition, the operator can at will alternate between high-capacity magazines (at least 25 rounds) and standard magazines, such as magazines designed for a pistol. This advantage enables these operators to have an ultimate capacity for automatic fire with a weapon that is more precise and effective than an automatic pistol.
SUMMARY OF THE INVENTIONThe invention involves two improvements to the use and operation of the KRISS-type firearm, described in several published documents including U.S. Pat. Nos. 7,997,183 and 7,201,094, both of which are specifically incorporated herein by reference. This type of firearm can employ a mobile mass, which can also be called a slider or inertia block, to control recoil forces and which moves in concert with the bolt of the firearm during the firing cycle. In one aspect, the improvement relates to an ambidextrous cocking lever than can be used with a KRISS-type firearm. In another aspect, the improvements comprise a magazine locking and releasing system that can be operated from either side of the firearm and which advantageously can lock and efficiently use extended magazines holding 25 or more rounds of a typical pistol or machine pistol ammunition, such as .40 caliber, .45 caliber, .45 ACP, or other popular or available ammunition.
Thus, in an assembly for cocking the KRISS-type firearm that employs a mobile mass that moves in conjunction with the movement of the bolt during a firing cycle, the cocking assembly of the invention comprises a removable cocking lever. The lever can be inserted into either side of the firearm frame to operate and load or cock the firearm. It is removable in that it can be removed from the firearm, or it can be locked into one side or the other and then unlocked and moved to the other side as the operator prefers. In preferred aspects shown in the drawings, the cocking lever has on one end a handle or cocking button and on the other end a main pin or rod projecting into the frame and into the mobile mass residing in the frame. This main pin has at least one tenon or projection that can lock into a receiving slot or area of the mobile mass so that the operator can forcefully move the mobile mass into a loaded or cocked position. As shown in
In a preferred example, the cocking lever has an elastic element or spring in the handle region that applies a force to the main pin. When the operator pushes on the handle in the direction of the firearm frame, the spring is depressed and a projection on the end of the main pin can be position into a locking area in the mobile mass. The spring can also function to clamp or tightly hold the projection on the main pin once the cocking lever is fully inserted into the mobile mass. The handle can also comprise a screw, rivet, or flange that the operator can turn in order to position the projection on the end of the main pin into the locking area in the mobile mass. This option in the handle or cocking button design can be referred to as a manual engaging switch that is capable of turning the projection or tenon on the end of the main pin into a locking area. The locking area can essentially be a slot positioned at the end of the hole or tunnel through the mobile mass, and the locking area can be present on both sides of the hole or tunnel so that the cocking button can be locked into either side. This aspect of the invention is shown in the drawings of
In another aspect of the improvements to the KRISS-type firearm, the firearm is designed to accommodate and effective lock and release larger or extended magazines. Thus, the firearm frame will generally comprise a magazine well and an assembly for locking and releasing the magazine. In the design of the invention, the releasing buttons are located on and can be operated from both sides of the frame. In preferred examples shown in the drawings, the assembly comprises both left and right side control buttons operably connected to a push rod within the magazine well. When depressed, the control button in turn forces a push rod to activate the movement of at least one catch projection in the magazine well to release a magazine when it has been locked into the magazine well. Generally, a firearm will have one catch projection to hold the magazine. In the invention, there can be multiple catch projections that are positioned to hold the magazine through one or more retention means on the surface of the magazine. Accordingly, the invention also encompasses magazines, especially extended magazines of 25 or more rounds, with multiple retention means to interact with the catch projections described here. Where there are two catch projections in the magazine well, these can be referred to as upper and lower catch projections, which hold the magazine simultaneously. The design of the lower catch projection can vary from the upper. In fact, in preferred examples, the lower catch projection is a hook or clasp that also functions to stabilize the magazine during the firing of the firearm. In some firearms, extended magazines have the problem of vibrating and falling out of the magazine well while firing. The assembly of the invention in one aspect solves this problem and securely holds an extended magazine even during rapid or automatic firing.
The specific aspects of the magazine locking and releasing assembly can include a spring positioned to return the control button to its resting position after the operator depresses the left or right side control button to release the magazine. Also, the design includes an upper catch projection that fits into a slot in the magazine to lock the magazine in place. Thus, a magazine has a properly positioned recess slot. The lower catch projection can, as noted above, employ a hook or clasp, and the corresponding magazine can have a properly positioned element that fastens the magazine in place when locked. Generally, the magazine is locked into place by inserting it forcefully into the magazine well, and the assembly includes elastic or spring elements that tension the catch projections so that the magazine is locked once fully inserted into the magazine well. In other aspects, the control button used with the invention comprises a pair of sloped planes that contact the upper catch projection that lock the magazine into the magazine well in order to release the magazine. The same sloped planes, or other areas of the control button, can contact a push rod that activates the lower catch projection simultaneously with the activation of the upper catch projection. The designs of the magazine locking and releasing assembly shown in the drawings here are merely exemplary of the options one of ordinary skill in the art can devise.
The invention is presented in more detail using the examples shown in the following drawings:
The following description is one possible and exemplary embodiment of the cocking mechanism characterizing the invention and is not exhaustive in any way. The Figures associated with this document show the constituent parts of the compound mechanism as used in an exemplary firearm: a main body or frame (A) and mobile mass (1) with a bore or tunnel (6) traversing the mobile mass (1) from one side to the other; a groove (7) tangent to the tunnel (6), two slots (8) and (8a) also arranged in the sidewalls (16) and (16a) of the mobile mass (1). This mobile mass (1) receives in the tunnel (6) an assembly referred to as the cocking lever (
The mechanical cocking assembly introduced above operates with a component referred to as the “mobile mass” (also referred to as a “slider” or “inertia block” in various embodiments) and an assembly called the “cocking lever” to facilitate understanding. The mechanical component referred to as the mobile mass (1), as shown in
The main pin (2) of the “cocking lever” assembly receives a retention means (4) (screw, rivet or other known mode of rigid connection), the internal surface (17) of which retains the other end of the spring (5) (
The device characterizing the invention is mounted according to the following sequence: the traversing tunnel (6) of the mobile mass (1) receives the main pin (2) of the “cocking lever” assembly. The main pin (2), positioned by its retention tenon (9) (
The following description is a possible implementing example of the mechanism characterizing an aspect of the invention and it is therefore not exhaustive. The Figures associated with this document show exemplary parts constituting the ambidextrous double magazine-retention mechanism. In particular it is composed of a frame (201) with a magazine, comprising inside the opening or magazine well (201a) (
The mechanical device, subject of the invention described above, operates according to the following sequence, considering that a magazine has been already introduced in the magazine well of the weapon and may be empty or not. The user decides to replace a magazine with another according to convenience or necessity.
To do this, the operator exerts a thrusting action on one or the other of the ends (D; right) and/or (G; left) of the control button (2) (
This action still simultaneously and jointly causing the movement of the upper catch (204) (
At the same time, in the case of a “long” magazine (205a, 205b) (
Any one of the ejected magazines can be replaced by a simple procedure common to all automatic weapons and performed, in the case here or in the case of the invention, as follows:
A “short” magazine (205) (
In another case, a long magazine (205a, 205b) (
According to another implementation, the longer magazine (205b) (
Whatever the nature and shape of the magazine, whether it is single or double stack for the presentation of one or more munitions to be loaded, latching or catching of the magazine in working position will be effected as has just been described.
Claims
1. An assembly for cocking a firearm for use in a firearm that employs a mobile mass moving in conjunction with the movement of the bolt of a firearm during its firing cycle, the assembly comprising a removeable cocking lever, wherein the cocking lever comprises on one end a handle and the other end a main pin, and wherein the main pin has at least one tenon or projection that locks into a receiving slot or area of the mobile mass, and the mobile mass comprises an interior hole or tunnel through which the main pin can be inserted from either side of the firearm allowing ambidextrous use, whereby the cocking lever in the locked position can move the mobile mass by the action of the operator's force on the handle.
2. The assembly of claim 1, wherein the cocking lever further comprises an elastic element or spring in the handle end that applies force against the handle when the main pin is inserted into the mobile mass.
3. The assembly of one of claim 1 or 2, wherein the handle of the cocking lever further comprises a manual engaging switch capable of turning the projection or tenon on the end of the main pin.
4. The assembly of claim 3, wherein the manual engaging switch is a screw, a rivet, or comprises a flared flange.
5. The assembly of claim 1, wherein the mobile mass has at least one slot in addition to the receiving slot on each side of the mobile mass.
6. A firearm comprising the assembly of one of claims 1 to 5, wherein the frame of the firearm comprises a groove for the movement of the cocking lever down the frame away from the barrel and a receiving notch or area that is capable of holding the cocking lever in a loaded position when the operator moves the locking lever along the groove from an unloaded position to a loaded position.
7. A firearm frame comprising a magazine well and an assembly for locking and releasing the magazine that can be operated from either side of the frame, the assembly comprising left and right side control buttons operably connected to a push rod within the magazine well, the push rod activating the movement of at least one catch projection in the well to release a magazine when locked in the magazine well, the at least one catch projection positioned to hold the magazine through one or more retention means on the surface of the magazine.
8. The firearm frame of claim 7, wherein upper and lower catch projections hold the magazine simultaneously.
9. The firearm frame of one of claim 7 or 8, wherein a spring is positioned to return the control button to its resting position after the operator depresses the left or right side control button to release the magazine.
10. The firearm frame of one of claim 8 or 9, wherein the magazine well is capable of receiving an extended magazine and the lower catch projection comprises a spring-loaded clasp or hook that locks the extended magazine.
11. The firearm frame of one of claims 8-10, wherein the upper catch projection fits into a slot in the magazine to lock the magazine.
12. The firearm frame of claim 7, wherein the control button comprises a pair of sloped planes that contact an upper catch projection that lock the magazine into the magazine well.
13. An extended magazine for use in the firearm frame as claimed in claim 10, wherein the magazine comprises a receiving area that interacts with the claps or hook to lock the magazine securely in place.
Type: Application
Filed: Dec 12, 2011
Publication Date: Oct 18, 2012
Inventors: Renaud Kerbrat , Antoine Robert , Jan Henrik Jebsen
Application Number: 13/323,727
International Classification: F41A 19/06 (20060101); F41A 9/61 (20060101); F41A 3/12 (20060101);