ADJUSTABLE SUPPORT FOR FIREARMS
An adjustable support for a firearm includes an extension shaft having a distal end, a proximal end, a central axis, and a plurality of engagement features formed at a plurality of axial locations between the distal end and the proximal end. A housing assembly is configured to house the extension shaft and defines a reference datum. At least one locking member is operatively associated with the housing assembly and is configured selectively engage the engagement features. An actuator is operatively associated with the housing assembly such that translation of the actuator relative to the central axis moves the locking members into and out of engagement with the engagement features on the extension shaft. Rotation of the actuator relative about the central axis moves the distal end of the extension shaft away from the housing assembly.
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1. The Field of the Invention
The present application generally relates to adjustable supports for firearms, such as monopods and bipods.
2. The Relevant Technology
Modern firearms make use of cartridges that include a projectile seated in a casing. The casing has an internal cavity defined therein that contains a charge of rapidly combusting powder. A primer is seated in a recess formed in a rear portion of the casing. A hole in the primer casing places the primer in communication with the internal cavity containing the power. A projectile is seated in the front portion of the casing such that the powder is more or less sealingly contained in the casing between the primer and the projectile.
An action, such as a bolt action, is used to advance the cartridge into a firing chamber ahead of firing. While in the firing chamber, a firing pin strikes the primer, causing the primer to ignite. The ignition is directed to the powder, which burns within the casing. The powder burning within the casing generates a rapidly expanding gas. The pressure generated by the rapidly expanding gas propels the projectile from the casing and through the barrel of the firearm toward an intended impact point. A sight is used to allow an operator to aim the projectile to the intended impact point.
For example, optical sights are often used that make use of an aiming point that is projected onto the intended target. Often, the optical sights provide magnification for the operator to view an intended impact point at long range more clearly and thus allow the operator to shoot more accurately. While magnification allows the operator to see intended targets at extended range more clearly, the field of view the operator is able to see at that range can be relatively small. Further, relatively small movements or variations in the orientation of the firearm can result in large variations in the actual impact point of the projectile.
Accordingly, operators often take several measures to steady the rifle at the desired orientation. Often, a bipod is used with the front stock and the operator then supports the butt end of the stock. While such a system supports the front end of the rifle, small variations in the orientation of the rear end of the rifle can also yield unsatisfactory results.
The subject matter claimed herein is not limited to embodiments that solve any disadvantages or that operate only in environments such as those described above. Rather, this background is only provided to illustrate one exemplary technology area where some examples described herein may be practiced.
BRIEF SUMMARY OF THE INVENTIONAn adjustable support for a firearm includes an extension shaft having a distal end, a proximal end, a central axis, and a plurality of engagement features formed at a plurality of axial locations between the distal end and the proximal end. A housing assembly is configured to house the extension shaft and defines a reference datum. At least one locking member is operatively associated with the housing assembly and is configured selectively engage the engagement features. An actuator is operatively associated with the housing assembly such that translation of the actuator relative to the central axis moves the locking members into and out of engagement with the engagement features on the extension shaft. Rotation of the actuator relative about the central axis moves the distal end of the extension shaft away from the reference datum associated with the housing assembly.
This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential characteristics of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The features and advantages of the invention may be realized and obtained by means of the instruments and combinations particularly pointed out in the appended claims. These and other features of the present invention will become more fully apparent from the following description and appended claims, or may be learned by the practice of the invention as set forth hereinafter.
To further clarify the above and other advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. The invention will be described and explained with additional specificity and detail through the use of the accompanying drawings in which:
A monopod and rifle stocks including monopods are provided herein that provide both incremental adjustment as well as infinite adjustment for the extension of an extension shaft along an axis relative to a reference datum. The incremental adjustment as well as the infinite adjustment are controlled and manipulated by a single actuator. In at least one example, the actuator is a knob that is moved parallel to the axis to control the incremental adjustment while the knob can rotated relative to the central axis to provide infinite adjustment. Such a configuration can allow an operator to quickly extend the extension shaft to near a desired extension using the incremental adjustment and then to fine tune the position of the extension shaft with the infinite adjustment to the final desired position. Additional adjustments can be performed quickly using the same process.
In at least one example, rotation of the actuator is isolated from the extension shaft. Such a configuration can further increase the speed of moving the extension shaft to the desired extension by reducing the likelihood that fine adjustments of the shaft will result in an unintended change in the orientation of the associated firearm due to movement of the extension shaft relative to the ground due to rotation.
In other examples, the actuator can have a different configuration such that transverse or lateral movement of the actuator or some portion of the actuator relative to the shaft controls incremental adjustment. Such examples can include protrusions that are moved laterally to engage and disengage corresponding recesses in the extension shaft. For ease of reference, exemplary monopod configurations will be discussed that in which locking members are moved radially inward and outward by axial translation of an actuator, though it will be appreciated that other configurations can be provided without departing from the scope of the disclosure.
Regardless of the type, cycling of the action 130 moves a cartridge into position to be fired and removes the casing after the cartridge has been fired. For example, forward operation of the action 130 can move a cartridge through a breech and into position with the barrel 130. Thereafter, a trigger 150 can be actuated to release a firing pin in the action 130. The firing pin (not shown) strikes a primer, which ignites gun powder in a casing to propel a projectile through the barrel 120.
In the illustrated example, the stock 110 generally includes a fore-end 110A and a butt-end 110B. A monopod 160 is coupled to or integrated with the butt-end 110B of the stock 110. As will be discussed in more detail below, the monopod 200 is configured to move between an extended state and a retracted state. For ease of reference, discussion will be made to proximal and distal portions of the monopod in which a proximal portion is nearer the butt-end 110B than a corresponding distal portion.
The monopod 160 may be configured to allow an operator to quickly move the monopod 160 to any state between the fully retracted and fully extended states shown and discussed below through the use of incremental and infinite adjustments. In the example shown and discussed in more detail below, the monopod includes an actuator, shown as a knob (and hereinafter referred to as a knob for ease of reference) that controls both the incremental as well as infinite adjustments.
For example, actuator can be moved parallel to axis C to control incremental adjustments and can be rotated about axis C to control infinite adjustment. Such a configuration can allow for independent incremental and infinite adjustments using the same actuator. One exemplary monopod will be described in more detail below.
The monopod 200 includes an extension spring 210, a spring guide 215, and a retaining clip 220 that are configured to be positioned within the first housing member 400 to allow the extension spring 210 to exert a biasing force against the extension shaft 300 to urge the extension shaft 300 distally out of the first housing member 400. The extension of the extension shaft 300 will be described with reference to a reference datum R associated with the third housing 600, though it will be appreciated that the extension of the extension shaft 300 can be described with reference to any desired structure.
The first housing member 400 is configured to be positioned at least partially within the second housing member 500. The monopod 200 includes locking members 230, a retention spring 240, and a retaining clip 250. The locking members 230 are configured to be positioned between the first housing member 400 and the second housing member 500. The first housing member 400 and the second housing member 500 include features that house the locking members 230 in such a manner that relative axial movement between the first housing member 400 and the second housing member 500 moves the locking members 230 in to and out of engagement with the extension shaft 300. When the locking members are in engagement with the extension shaft 300, the monopod 200 will be described as being in a locked state. Similarly, when the locking members 230 are out of engagement with the extension shaft 300 the monopod 200 will be described as being in an unlocked state.
The retention spring 240 and the retaining clip 250 couple the first housing member 400 and the second housing member 500 in such a manner as to allow the first housing member 400 and the second housing member 500 to move between the unlocked and locked state while exerting a biasing force therebetween to move them to a desired one of the unlocked and locked positions.
In the illustrated example, the retention spring 240 can be configured to bias the first housing member 400 and second housing member 500 toward a locked state. The relative positions described below are provided for ease of illustration only. It will be appreciated that the components can be configured differently, located in different positions and/or moved in different directions to achieve the same functionality described below without departing from the scope of the disclosure. The configurations of the extension shaft 300, the first housing member 400, the second housing member 500, and the third housing member 600 will each be discussed in more detail with reference to
In the illustrated example, the spring lumen 310 can be sized to receive at least a portion of the ejection spring 210 and the spring guide 215 (both seen in
As shown in
As illustrated in
More specifically, as particularly shown in
In particular, the external features can include a plurality of grooves 330 formed by alternating ridges 332 and recesses 334 configured to receive at least a portion of the locking members 230. For example, the recesses 334 may be sized and shaped to have at least a portion of the locking member seated 230 therein.
While locking members 230 are seated in the recesses 334, the ridges 332 can help prevent unintended axial movement of a locking member 230. The grooves 330 can also be shaped to facilitate movement of the locking members 230 into and out of contact with the grooves 330. In particular, each groove 330 can have angled sides 336, 338 that guide the locking members 230 into the groove 330 if an edge of the locking member 230 is slightly out of alignment with the center of a particular recess 334.
As shown in
As illustrated in
Further, the first housing member 400 has an extension shaft lumen 410 defined therein that extends proximally from the distal end 400A. In the illustrated example, the extension shaft lumen 410 extends from the distal end 400A through the proximal end 400B of the first housing member 400 to form an inner surface 412 and an outer surface 414. In other examples, the extension shaft lumen 410 does not extend completely through the first housing member 400.
As previously discussed, the first housing member 400 includes structure to constrain the axial movement of the spring guide 200 (
As illustrated in
Engagement between the locking members 230 and the extension shaft 300 can act to control the ejection of the extension shaft 300, as will now be discussed in more detail with reference to
The first housing member 400 also includes structure configured to help control the axial position and translation of the second housing member 500 relative to first housing member 400. As shown in
As illustrated in
For example, an annular groove 532 can be defined in the inner surface 530 that is in communication with the lumen 510. The annular groove 532 has a larger diameter than the lumen 510 adjacent the annular groove 532. As will be described in more detail below, such a configuration allows the annular groove 532 to receive at least a portion of the locking members 230 (
The annular groove 532 can be moved into and out of proximity with the locking members 230 by axial translation of the first housing member 400 relative to the second housing member 500. The coupling of the first housing member 400 to the second housing member 500 will now be discussed in more detail, followed by a more detailed discussion of the interaction between the locking members 230, the extension shaft 300, the first housing member 400, and the second housing member 500.
Referring now to
In the illustrated example, the shaft 402 of the first housing member 400 can be passed through the second housing member 500 until the external retaining clip groove 440 is positioned proximally of the proximal end 500B of second housing member 500. The retention spring 240 is then placed over the shaft 402. Thereafter, the retaining clip 250 is then secured to the external retaining clip groove 440. With the retaining clip 250 in place, distal movement of the first housing member 400 is resisted by compression of the retention spring 240 between the proximal end 500B of the second housing member 500 and the retaining clip 250.
As previously introduced, the first housing member 400 also includes a flared skirt 404. As shown in
In particular, the locking members 230 can be displaced radially outward in response to engagement between the locking member 230 and some structure in contact with the inner surface 412 of the first housing member 400. In other examples, biasing members can bias the locking members 230 radially inward or radially outward as desired. In the illustrated example, one such structure can include the ridges 332 of the grooves 330 (both seen in
Initially, the first housing member 400 can be thus aligned to allows the extension shaft 300, the extension spring 210, and the spring guide 215 to be positioned within the extension lumen shaft 410 as shown in
The first housing member 400 can be returned to a position relative to the second housing member 500 as shown in
Accordingly, movement of the first housing member 400 axially relative to the second housing member 500 between the positions shown in
As previously introduced, the monopod 200 is also configured to provide infinite adjustment which may be manipulated with the same actuator that controls incremental adjustment. Exemplary structure associated with infinite adjustments will first be discussed, followed by a discussion of the manipulation of the actuator associated with both the incremental as well as the infinite adjustments.
As shown in
The proximal end 600B of the third housing member 600 can include a stock interface 630. The stock interface 630 can have any configuration that allows the third housing member 600 to be secured to the stock 110 (
As shown in
As previously introduced, the incremental adjustment and infinite adjustments can be made by manipulating a single actuator, such as the knob 280 shown in
As also shown in
In at least one example, the length of the housing slots 560 can be greater than the thickness of the knob 280. The relative length of the housing slots 560 can allow the knob 280 to move axially independently from the second housing member 500. Accordingly, axial movement of the knob 280 causes the knob tabs 284 to engage and move the first housing member 400 axially while causing minimal or no axial movement of the second housing member 500 axially while rotation of the knob member 280 can result in rotation of the second housing member 500 while causing minimal or no rotation of the first housing member 400.
The axial movement can be sufficient to cause the locking members 230 to move in and out of engagement with the extension shaft 300 to allow for incremental adjustments of the extension of the distal end 300A of the extension shaft 300 relative to the reference datum R. The rotation of the second housing member 500 causes the second housing member 500, and thus the distal end 300A of the extension shaft 300, to move axially relative to the reference datum R to thereby provide infinite adjustments. As a result, incremental and infinite adjustments can be made using a single actuator. One exemplary process will now be described in more detail below with reference to
As shown in
In the fully retracted position, the foot pad 270 is spaced a first distance 710 from the reference datum R. With the foot pad 270 spaced the first distance 710 from the reference datum R, the extension spring 210 can be compressed between the spring guide 215 and the extension shaft 300 to cause the extension spring 210 to exert an ejection force on the extension shaft 300 that acts to move the extension shaft 300 and thus the foot pad 270 distally away from the reference datum R. Engagement between the locking members 230 and the extension shaft 300 resists the ejection force provided by the extension spring 210.
In order to move the monopod 200 from a locked state to an unlocked state, the knob 280 is moved distally as shown in
While the locking member 230 are out of engagement with the extension shaft 300, the ejection force exerted by the extension spring 210 moves the extension shaft 300 distally relative to the first housing member 400, as shown in
Thereafter, as shown in
Accordingly, a monopod has been discussed herein that provides both incremental adjustment as well as infinite adjustment for the position of an extension shaft. The incremental adjustment as well as the infinite adjustment are controlled and manipulated by a single actuator. In at least one example, the actuator is a knob that is moved parallel to the central axis provide the incremental adjustment. In such an example, the knob can rotated relative to the central axis to provide infinite adjustment. In other examples, the actuator can have a different configuration such that transverse or lateral movement of the actuator or some portion of the actuator relative to the shaft allows for infinite adjustment. Such a configuration can allow an operator to quickly extend the extension shaft to near a desired extension using the incremental adjustment and then to fine tune the position of the extension shaft with the infinite adjustment to the desired position. Additional adjustments can be performed quickly using the same process.
The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiments are to be considered in all respects only as illustrative and not restrictive. The scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims
1. An adjustable support for a firearm, comprising:
- an extension shaft having a distal end, a proximal end, a central axis, and a plurality of engagement features formed at a plurality of axial locations between the distal end and the proximal end;
- a housing assembly configured to house the extension shaft and defining a reference datum;
- at least one locking member operatively associated with the housing assembly and configured selectively engage the engagement features; and
- an actuator operatively associated with the housing assembly, wherein translation of the actuator relative to the central axis moves the locking members into and out of engagement with the engagement features on the extension shaft and wherein rotation of the actuator about the central axis moves the distal end of the extension shaft away from the reference datum associated with the housing assembly.
2. The adjustable support of claim 1, wherein translation of the actuator relative to the central axis is translation parallel to the central axis.
3. The adjustable support of claim 1, wherein translation parallel to the central axis moves the locking member radially inward and outward relative to the extension shaft.
4. The adjustable support of claim 3, wherein the locking member includes a spherical locking member.
5. The adjustable support of claim 1, wherein the engagement features include alternative grooves and ridges.
6. An adjustable support for a firearm, comprising:
- an extension shaft having a distal end, a proximal end, a central axis, and a plurality of engagement features formed at a plurality of axial locations between the distal end and the proximal end;
- a housing assembly having a reference datum, a first housing member configured to receive at least a portion of the extension shaft, and a second housing member configured to receive at least a portion of the first housing member;
- at least one locking member operatively associated with the housing assembly and configured selectively engage the engagement features; and
- an actuator operatively associated with the housing assembly, wherein translation of the actuator parallel to the central axis moves the first housing assembly relative to the second housing assembly to move the locking members into and out of engagement with the engagement features on the extension shaft and wherein rotation of the actuator relative about the central axis moves the distal end of the extension shaft away from the reference datum, the actuator being configured to move parallel to the central axis independently of rotation about the central axis.
7. The adjustable support of claim 6, wherein the first housing member includes receiving recesses defined therein configured to receive at least a portion of each of the locking members.
8. The adjustable support of claim 7, wherein the second housing member includes an interior lumen defined therein forming an interior surface, wherein the interior surface has an annular groove formed therein such that alignment of the annular groove and the receiving recesses allows the locking features to move out of engagement with the engagement features on the extension shaft and wherein alignment of the receiving recesses with the inner surface adjacent the annular groove moves the locking features into engagement with the engagement features on the extension shaft.
9. The adjustable support of claim 8, wherein a proximal end of the second housing member includes a threaded portion.
10. The adjustable support of claim 9, wherein the housing assembly further includes a threaded third housing member configured to be threadingly coupled to the threaded portion of the proximal end of the second housing member and wherein rotation of the actuator about the central axis threads and unthreads the second housing member to and from the third housing member.
11. An adjustable support for a firearm, comprising:
- an extension shaft having a distal end, a proximal end, a central axis, and a plurality of engagement features formed at a plurality of axial locations between the distal end and the proximal end;
- a housing assembly having: a first housing member having a shaft portion extending distally from a proximal end toward a distal end, a flared portion positioned distally from the shaft portion, a first lumen extending proximally from the distal end and being configured to receive at least a portion of the extension shaft, and wherein a plurality of receiving recesses are defined in the first housing member and are in communication with the first lumen, a second housing member having a second lumen defined therein extending proximally from a distal end of the second housing member toward a proximal end, the second lumen being configured to receive at least a portion of the first housing member, an annular groove defined in an inner surface of the second housing member, and alternating tabs and slots formed adjacent the distal end of the second housing member;
- a plurality of locking members positioned between the inner housing of the second housing member and the first housing member in the receiving recesses; and
- an actuator operatively associated with the housing assembly, the actuator being configured to move the first housing member parallel to the central axis relative to the second housing member to move the receiving recesses into and out of alignment with the annular groove in the second housing member to move the locking member into and out of engagement with the engagement features on the extension shaft, the actuator being further configured to rotate the second housing member relative to the central axis independently of movement of the first housing member parallel to the central axis.
12. The adjustable support of claim 11, wherein further comprising a biasing member between the distal end of the first housing member and the extension shaft.
13. The adjustable support of claim 11, wherein the shaft of the first housing member extends proximally of a proximal end of the second housing member.
14. The adjustable support of claim 13, further comprising a biasing member positioned between the proximal end of the first housing member and the proximal end of the second housing member.
15. The adjustable support of claim 11, wherein a proximal end of the second housing member includes a threaded portion.
16. The adjustable support of claim 15, further comprising a third housing member having a threaded distal portion configured to have the threaded portion of the proximal end of the second housing member coupled thereto, wherein the rotation of the actuator about the central axis threads and unthreads the second housing member from the third housing member to move the distal end of the extension shaft independently from extension of the extension shaft relative to the first housing member.
Type: Application
Filed: Jan 15, 2010
Publication Date: Jul 21, 2011
Applicant: DESERT MANUFACTURING, LLC (Salt Lake City, UT)
Inventor: Nicholas E. Young (Murray, UT)
Application Number: 12/688,696
International Classification: F41A 23/06 (20060101); F41C 27/22 (20060101);