Abstract
A bedding assembly for a rifle that includes a bedding block. The rifle has a barrel, which is attached to a receiver assembly, and the barrel has a longitudinal axis. The receiver assembly is attached to a stock by means of the bedding block. The bedding block is pivotally attached to the barrel, thereby forming an axis of pivotal attachment of the bedding block to the barrel. The axis of pivotal attachment of the bedding block to the barrel is horizontally perpendicular to and intersects the longitudinal axis of the barrel.
Claims
1. A bedding assembly for a rifle comprising: (a) a bedding block; and (b) a bedding bushing; wherein the rifle has a barrel, and the barrel has a longitudinal axis; wherein the bedding block and bedding bushing each has a central bore; wherein the central bore of the bedding block and the central bore of the bedding bushing each has a longitudinal axis; wherein the longitudinal axis of the bedding block and the longitudinal axis of the bedding bushing are aligned with each other to form a common longitudinal axis; wherein the common longitudinal axis formed by the bedding block and the bedding bushing is aligned with the longitudinal axis of the barrel; wherein the bedding block comprises an annular ring and two opposing lobes that extend forwardly from a front end of the annular ring; wherein each lobe has a curved surface that extends outwardly from the front end of the annular ring; wherein the bedding bushing is comprised of an outer annular ring and an inner annular ring, the outer annular ring being situated forwardly of the inner annular ring; wherein the outer annular ring of the bedding bushing has an outer diameter, the inner annular ring of the bedding bushing has an outer diameter, and the outer diameter of the outer annular ring is greater than the outer diameter of the inner annular ring; wherein the inner annular ring of the bedding bushing is configured to fit within the annular ring of the bedding block; wherein the outer annular ring of the bedding bushing comprises two cutouts that are configured to receive the two opposing lobes of the bedding block; wherein the annular ring of the bedding block comprises an interior surface, and the interior surface of the annular ring comprises two opposing longitudinal strips; and wherein the barrel comprises a breech end, and both the bedding block and the bedding bushing are configured to receive the breech end of the barrel.
2. The bedding assembly of claim 1, further comprising a wave spring; wherein the bedding block comprises a rear circumferential groove that is configured to receive the wave spring.
3. The bedding assembly of claim 1, wherein each lobe is in the form of a semi-circle.
4. The bedding assembly of claim 1, wherein the annular ring of the bedding block has an interior curvature; wherein each lobe has an interior surface; and wherein the interior surface of each lobe is concave to match the interior curvature of the annular ring of the bedding block.
5. The bedding assembly of claim 1, wherein the bedding block and the two opposing lobes are a single machined part.
6. The bedding assembly of claim 1, wherein the rifle comprises a stock; and wherein the bedding block further comprises a mounting bracket that is configured to attach the bedding block to the stock.
7. The bedding assembly of claim 1, wherein the outer annular ring of the bedding block and the inner annular ring of the bedding bushing are a single machined part.
8. The bedding assembly of claim 1, wherein the outer annular ring of the bedding bushing has a front edge; and wherein the front edge of the bedding bushing is beveled.
9. The bedding assembly of claim 1, wherein the annular ring of the bedding block comprises a front edge; wherein the outer annular ring of the bedding bushing comprises a rear circumferential edge; and wherein the bedding block and the bedding bushing are configured so that the rear circumferential edge of the outer annular ring of the bedding bushing faces but does not come into contact with the front edge of the annular ring of the bedding block so as to create a first gap between the front edge of the annular ring of the bedding block and the rear circumferential edge of the bedding bushing.
10. The bedding assembly of claim 9, wherein the rifle comprises a receiver; wherein the bedding block comprises a rear surface; wherein the inner annular ring of the bedding bushing is longer than the annular ring of the bedding block, thereby creating a second gap between the rear surface of the bedding block and a front end of the receiver; wherein the inner annular ring of the bedding bushing comprises a rear face; and wherein the rear face of the inner annular ring of the bedding bushing is configured to abut up against the front end of the receiver.
11. The bedding assembly of claim 1, wherein each of the flat longitudinal strips extends from a rear edge of the annular ring of the bedding block to a front edge of one of the two opposing lobes.
12. The bedding assembly of claim 1, wherein each of the flat longitudinal strips is parallel with a longitudinal center of the annular ring of the bedding block and parallel with the longitudinal axis of the barrel; wherein each of the two flat longitudinal strips has a central longitudinal axis; and wherein the flat longitudinal strips are configured so that a line drawn between the central longitudinal axis of each of the flat longitudinal strips would intersect the longitudinal axis of the barrel.
13. The bedding assembly of claim 1, wherein the annular ring of the bedding block has a vertical inner diameter and a horizontal inner diameter; and wherein the vertical inner diameter of the bedding block is greater than the horizontal inner diameter of the bedding block.
14. The bedding assembly of claim 13, wherein the inner annular ring of the bedding bushing has an outer diameter; and wherein the horizontal inner diameter of the annular ring of the bedding block is approximately equal to the outer diameter of the inner annular ring of the bedding bushing.
15. The bedding assembly of claim 1, wherein the bedding bushing is symmetrical from top-to-bottom and from right-to-left.
16. The bedding assembly of claim 1, wherein the bedding bushing has a constant inner diameter.
17. A bedding assembly for a rifle comprising: a bedding block; wherein the rifle comprises a barrel, and the barrel is attached to a receiver assembly; wherein the barrel has a longitudinal axis; wherein the receiver assembly is attached to a stock by means of the bedding block; wherein the bedding block is pivotally attached to the barrel, thereby forming an axis of pivotal attachment of the bedding block to the barrel; and wherein the axis of pivotal attachment of the bedding block to the barrel is horizontally perpendicular to and intersects the longitudinal axis of the barrel.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0019] FIG. 1 is a perspective view of the rifle bedding assembly of the present invention incorporated into a rifle.
[0020] FIG. 2 is a detail perspective view of the rifle bedding assembly shown in FIG. 1 as installed on a rifle.
[0021] FIG. 3 is an exploded view of the parts shown in FIG. 2.
[0022] FIG. 4 is a top perspective exploded view of the same parts that are shown in FIG. 3.
[0023] FIG. 5 is the same view shown in FIG. 2 with the stock, trigger guard (also referred to as the “bottom metal”), floor plate and magazine release omitted.
[0024] FIG. 6 is a bottom perspective view of the same parts in the same configuration as shown in FIG. 5.
[0025] FIG. 7 is a side view of the same parts in the same configuration as shown in FIGS. 5 and 6.
[0026] FIG. 8 is a side detail view of the bedding block and bedding bushing of the present invention shown in relation to the rifle barrel and receiver.
[0027] FIG. 9 is a top detail view of the parts shown in FIG. 2.
[0028] FIG. 10 is a section view taken at the line shown in FIG. 9.
[0029] FIG. 11 is a detail section view of the rifle bedding assembly of the present invention as shown in FIG. 10.
[0030] FIG. 12 is a top front perspective view of the bedding block of the present invention.
[0031] FIG. 13 is a front view of the bedding block of the present invention.
[0032] FIG. 14 is rear perspective view of the bedding block of the present invention.
[0033] FIG. 15 is a perspective view of an alternate embodiment of the bedding block of the present invention.
REFERENCE NUMBERS
[0034] 1 Rifle [0035] 2 Stock [0036] 3 Receiver [0037] 4 Barrel [0038] 4a Central bore [0039] 5 Bedding block [0040] 5a Annular ring [0041] 5b Lobe [0042] 5c Mounting bracket [0043] 6 Bedding bushing [0044] 6a Outer annular ring [0045] 6b inner annular ring [0046] 6c Cutout [0047] 7 Rifle bedding assembly [0048] 8 Wave spring [0049] 9 Circumferential groove [0050] 10 Screw
DETAILED DESCRIPTION OF INVENTION
A. Overview
[0051] The disadvantages of the prior art discussed above are overcome by the present invention, which changes the way in which the barrel and receiver are mounted on the stock so that the recoil moment (caused by the firing of the gun) and barrel harmonics are eliminated. The present invention is a device that is specifically designed to attach the barrel of a rifle to the stock so that the force associated with firing a bullet is directed along the longitudinal axis of the barrel and the high-stress areas of the receiver and barrel are symmetric about the bore longitudinal axis. This device incorporates a front pivotal attachment mechanism that is in-line with the force generated by the firing of the firearm.
[0052] The present invention, which is described more fully below, ensures that no impact moment is generated during the shot and no vibration is introduced into the barrel. As a result, there is no need for extra material to be added to the barrel and receiver to increase stiffness. The present invention also eliminates the need to tune the receiver/barrel to a certain ammunition type. The present invention can be used with different ammunition brands, bullet weight and velocity with virtually no effect on the bullet point of impact.
[0053] Because the present invention eliminates barrel vibration, the improved rifle has greater accuracy without having greater weight. The present invention allows for a lightweight rifle design that has superior accuracy as compared to conventional rifle systems. The improved rifle design may be used with various ammunition specifications to the same point of impact.
B. Detail Description of the Figures
[0054] FIG. 1 is a perspective view of the rifle bedding assembly of the present invention incorporated into a rifle. This figure shows various parts of the rifle 1, namely, the stock 2, receiver 3 and barrel 4. It also shows the bedding block 5 and bedding bushing 6, which are parts of the present invention. As shown in this figure, the bedding block 5 and bedding bushing 6 are situated between the barrel 4 and receiver 3. The barrel 4 has a longitudinal axis (through the central bore 4a in the barrel), and the bedding block 5 and bedding bushing 6 are aligned with the longitudinal axis of the barrel 4. The present invention is a bedding block assembly for a rifle. The particular type of rifle shown in the figures is a Remington Model 700™; however, the present invention is not limited to any particular make or model of rifle. The present invention may be retrofit to an existing rifle or may be incorporated into the rifle by an original equipment manufacturer. Any rifle parts as shown in the figures other than the bedding block assembly are provided for environment only and should not be construed as part of the present invention.
[0055] FIG. 2 is a detail perspective view of the rifle bedding assembly shown in FIG. 1 as installed on a rifle. This figure provides a closer view of the rifle bedding assembly 7, which includes the bedding block 5, the bedding bushing 6, and an optional wave spring 8 (see FIG. 3). The structure of the bedding block 5 and the bedding bushing 6 is shown more clearly in subsequent figures.
[0056] FIG. 3 is an exploded view of the parts shown in FIG. 2. This figure shows the receiver 3, which is situated at one end of the rifle bedding assembly 7, and the barrel 4, which is situated at the other end of the bedding assembly 7. As noted above, the rifle bedding assembly 7 is comprised of the bedding block 5, the bedding bushing 6, and the optional wave spring 8. The wave spring 8 fits into a circumferential groove 9 on the rear end of the bedding block 5 (see FIG. 14). When the bedding assembly 7 is installed on a rifle, the wave spring 8 provides tension between the front end of the receiver 3 and the rear end of the bedding block 5, thereby ensuring a tight fit between the bedding block 5 and the bedding bushing 6.
[0057] The bedding block 5 is comprised of an annular ring 5a and two lobes 5b that extend forwardly from the front end of the annular ring 5a. The lobes 5b are positioned directly opposite one another in the center of the right and left sides of the annular ring 5a. In this manner, a line drawn between the center point of each of the two lobes would intersect and be perpendicular to the longitudinal axis of the barrel (see b on FIG. 13). Each lobe 5b has a curved surface that extends outwardly (and forwardly) from the front end of the annular ring 5a, as noted above. (The lobes and cutouts would not be able to act as a hinge if the lobe did not have a curved or rounded surface, which enables the lobe to rotate or turn within the cutout.) In a preferred embodiment, each lobe 5b is in the shape of a semi-circle. In addition, the interior surface of each lobe is concave to match the interior curvature of the annular ring 5a. In a preferred embodiment, the annular ring 5a and the two lobes 5b are a single machined part.
[0058] The annular ring 5a of the bedding block 5 is situated on top of a mounting bracket 5c. The present invention is not limited to any particular form of the mounting bracket Sc. The purpose of the mounting bracket 5c is to enable the bedding block 5 to be secured to the stock 2. An alternate form of the mounting bracket Sc is shown in FIG. 15. In the embodiment shown in FIG. 3, the mounting bracket Sc is secured to the stock 2 with screws 10 (see also FIG. 4).
[0059] The bedding bushing 6 is comprised of two parts, both of which are in the form of an annular ring, with the outer annular ring 6a situated forwardly of the inner annular ring 6b. In a preferred embodiment, the outer annular ring 6a and the inner annular ring 6b are machined together as a single part. In a preferred embodiment, the front edge of the outer annular ring 6a is preferably beveled so as to avoid exposing the operator to sharp edges. The bedding block 5 and the bedding bushing 6 are both configured to receive the breech end of the barrel 4. In fact, the breech end of the barrel 4, which is threaded, as shown, passes through the center of the bushing block 6 and the center of the bedding barrel 5 and threads into the front end of the receiver 3.
[0060] The bedding bushing preferably has a constant inner diameter (in other words, the inner diameter of the outer annular ring 6a and the inner diameter of the inner annular ring 6b are the same) but two different outer diameters. Specifically, the outer diameter of the outer annular ring 6a is greater than the outer diameter of the inner annular ring 6b.
[0061] The inner annular ring 6b is configured to fit within the annular ring 50 of the bedding block 5. The outer diameter of the outer annular ring 6a of the bedding bushing 6 is preferably slightly less than the outer diameter of the annular ring 5a of the bedding block 5 (see FIG. 3). The bedding block assembly 7 is configured so that when the bedding bushing 6 is installed on the bedding block 5, the rear circumferential edge of the outer annular ring 6a (marked as “x” in FIG. 4) faces but does not come into contact with the front edge of the annular ring 5a of the bedding block 5 (marked as “y” in FIG. 4). In other words, there is a first gap (marked as “z” in FIG. 8) between these two surfaces. The outer annular ring 6a of the bedding bushing 6 comprises two cutouts 6c that are configured to receive the lobes 5b of the bedding block 5.
[0062] FIG. 4 is a top perspective exploded view of the same parts that are shown in FIG. 3. As shown in this and the preceding figure, the inner annular ring 6b of the bedding bushing 6 may also have cutouts (similar to the cutouts 6c in the outer annular ring 6a), but these cutouts have no functional purpose and are not a necessary part of the invention; they are shown here for ease of manufacturing.
[0063] FIG. 5 is the same view shown in FIG. 2 with the stock, trigger guard (also referred to as the “bottom metal”), floor plate and magazine release omitted. This figure shows the bedding block 5 and bedding bushing 6 installed on a rifle. Note that the tapered part of the barrel 4 begins only after the barrel exits the bedding bushing 6; that part of the barrel 4 that extends through the center of the bedding block 5 and the bedding bushing 6 has a constant outer diameter. Just as the outer diameter of the annular ring 5a of the bedding block 5 is slightly greater than the outer diameter of the outer annular ring 6a of the bedding bushing 6, the outer diameter of the annular ring 5a of the bedding block 5 is slightly greater than the outer diameter of the receiver 3. This is shown more clearly in FIG. 8.
[0064] FIG. 6 is a bottom perspective view of the same parts in the same configuration as shown in FIG. 5. This figure shows the underside of the mounting bracket Sc, which in this case comprises teeth that are designed to engage with a platform in the interior of the stock (see FIG. 4). As noted above, in this embodiment, the mounting bracket Sc is secured to the stock with screws 10. The present invention is not limited to any particular form of mounting bracket 5c, or any particular method of securing the mounting bracket to the stock, as long as the mounting bracket is sufficiently substantial in size to handle some of the moment load and configured to prevent the bedding block 5 from shearing off backwards during firing.
[0065] FIG. 7 is a side view of the same parts in the same configuration as shown in FIGS. 5 and 6. As shown in this figure, each lobe 5b of the bedding block 5 extends forwardly from the front surface of the bedding block and is inserted into a cutout 16c in the outer annular ring 6a of the bedding bushing 6. This figure also shows the front beveled edge of the outer annular ring 6a. When the bedding block assembly 7 of the present invention is installed on a rifle, the longitudinal axis of the barrel 4 is aligned with the central axis of the bedding bushing 6, the bedding block 5, and the receiver 2. This common axis is designated as “A” in FIG. 7.
[0066] FIG. 8 is a side detail view of the bedding block and bedding bushing of the present invention shown in relation to the rifle barrel and receiver. The purpose of this figure is to illustrate the movement in the barrel 4 upon firing. When the rifle is fired, the barrel and receiver (which are fixedly attached to each other) are prevented from moving laterally (that is, right to left) by virtue of the bands on the inside of the bedding block 6 (these bands are discussed more fully in connection with FIG. 12 below). As the barrel and receiver tilt upward, the top of the first gap z closes (while the bottom of this same gap opens), and the top of the second gap (labeled as z′ in FIG. 8) opens (while the bottom of this same gap closes). As the barrel and receiver tilt downward, the bottom of the first gap z closes (while the top of this same gap opens), and the bottom of the second gap Z opens (while the top of this same gap closes),
[0067] In other words, the present invention is designed so that there is not only a first gap x between the rear surface of the outer annular ring 6a of the bedding bushing 6 but also a second gap z′ between the rear surface of the bedding block 5 and the front end of the receiver 2. Both the first and second gaps are created by virtue of the fact that the inner annular ring 6b of the bedding bushing 6, which extends through the bedding block 5, is longer (measuring front to back, or along the longitudinal axis of the rifle) than the annular ring 5a of the bedding block 5. These gaps enable the barrel to tilt or rotate vertically (upward or downward) while at the same time the barrel is prevented from moving laterally. As a result of this configuration, the recoil load is absorbed entirely along the central axis of the barrel (that is, the common axis A).
[0068] FIG. 9 is a top detail view of the parts shown in FIG. 2. The purpose of this figure is simply to provide a reference for the section view shown in FIG. 10.
[0069] FIG. 10 is a section view taken at the line shown in FIG. 9. As shown in this figure, the axis of the central bore 4a that extends longitudinally through the center of the barrel 4 is aligned not only with the firing pin but also with the central axis of the bedding bushing 5 and bedding block 6. With lateral movement of the barrel 4 constrained, as described more fully below, the barrel 4 can only move upwardly or downwardly upon firing, thereby preventing the random barrel vibrations that are associated with conventional rifle bedding systems. By virtue of the unique structure of the bedding block 5 and bedding bushing 6, which act together as a hinge, the present invention constrains lateral (sideways) movement of the barrel while leaving limited clearance for the barrel to tilt or rotate vertically on hinge created by the coupling of the barrel block 5 with the barrel bushing 6.
[0070] FIG. 11 is a detail section view of the rifle bedding assembly of the present invention as shown in FIG. 10. This figure shows the wave spring 8, which is situated inside of the circumferential groove 9 in the bedding block 6. Because this figure is a side view, the lobes 6b are not visible in this figure. This figure shows the threads at the front end of the receiver 3 with which the breech end of the barrel 4 is threadably coupled. This figure also illustrates the fact, noted above, that the inner annular ring 6b of the bedding bushing 6 is longer (longitudinally or from front to back) than the annular ring 5a of the bedding block 5. In fact, the rear face of the inner annular ring 6b abuts up against the front face of the receiver 3, as shown, thereby creating the second gap z′. The length of the inner annular ring 6b is set so as to create both the first z and second z′ gaps. As shown here, the entire bedding bushing 6 fits solidly against the barrel (front end of bushing) and the receiver (rear end of bushing); as such, the bedding bushing 6 moves with the barrel and receiver when they rotate or tilt vertically upward or downward upon firing, and the bedding bushing 6 rotates on the hinge create by the lobes 5b and cutouts 6c. By contrast, because the bedding block 5 is secured to the stock 2 via the mounting bracket Sc, it does not move upon firing.
[0071] FIG. 12 is a top front perspective view of the bedding block of the present invention. As shown in this figure, the interior surface of the annular ring 5a of the bedding block 5 comprises opposing longitudinal strips 5d that are not concave like the rest of the inner surface of the annular ring 5a. Instead, these strips 5d are flat, and they extend from the rear edge of the annular ring 5a to the front edge of each lobe 5b. The strips 5d are parallel with the longitudinal center of the annular ring 5; therefore, they are also parallel to the longitudinal axis of the central bore 4a of the barrel 4. Because these strips 5d are flat and not concave, they exert pressure on the lateral sides of the barrel 4 when it is inserted through the bedding block 5; in other words, the strips 5d “hug” the barrel on either side of the barrel, thereby preventing it from moving right to left upon firing. The bedding block 5 and strips 5d are configured so that each strip (a) is parallel with (and on the same horizontal plane as) the longitudinal axis of the central bore 4a of the barrel 4 and (b) tightly grips the barrel 4 along the entire length of the strip.
[0072] FIG. 13 is a front view of the bedding block of the present invention. In a preferred embodiment, the vertical inner diameter of the annular ring 5a (marked as a′ in FIG. 13) is slightly greater than the horizontal inner diameter of the annular ring 5a (marked as b′ in FIG. 13 and extending between the two strips 5d). This is to ensure that the strips 5d maintain a tight hold on the barrel and that the barrel has some room to rotate upwardly or downwardly on the hinge created by the lobes 5b and cutouts 6c. The horizontal inner diameter of the annular ring 5a is approximately the same as the outer diameter of the inner annular ring 6b of the bedding bushing 6. Note that the bedding block 5 is symmetrical right-to-left. The bedding bushing 6 is symmetrical both top-to-bottom and right-to-left. The bedding bushing 6 is designed to absorb the expansion forces created upon combustion, whereas the bedding block 5 is designed to redirect the recoil moment along the longitudinal axis of the barrel. In tandem, the bedding block 5 and the bedding bushing 6 work together to reduce or eliminate barrel harmonics and recoil.
[0073] FIG. 14 is rear perspective view of the bedding block of the present invention. This figure shows the circumferential groove 9 into which the optional wave spring 8 is inserted. Obviously, if a wave spring 8 is not used, there would be no need for the circumferential groove 9 in the bedding block 5.
[0074] FIG. 15 is a perspective view of an alternate embodiment of the bedding block of the present invention. The purpose of this figure is to illustrate the fact that the bedding block 5 of the present invention may take different forms, as long as it is comprised of an annular ring 5a with lobes 5b. The mounting bracket 5c shown in this figure is also different than that shown in the previous figures. The other structural aspects of the invention-namely, the longitudinal strips 5d on the inner surface of the annular ring 5a and the hinge that is created by the lobes 5b and the cutouts 6c—are the same as previously described.
[0075] Although the preferred embodiment of the present invention has been shown and described, it will be apparent to those skilled in the art that many changes and modifications may be made without departing from the invention in its broader aspects. The appended claims are therefore intended to cover all such changes and modifications as fall within the true spirit and scope of the invention.
