U.S. patent application number 16/742175 was filed with the patent office on 2021-07-15 for firearm adjustable length stock assembly.
The applicant listed for this patent is Leapers, Inc.. Invention is credited to Tai-lai Ding, Tat Shing Yu.
Application Number | 20210215451 16/742175 |
Document ID | / |
Family ID | 1000004640379 |
Filed Date | 2021-07-15 |
United States Patent
Application |
20210215451 |
Kind Code |
A1 |
Ding; Tai-lai ; et
al. |
July 15, 2021 |
FIREARM ADJUSTABLE LENGTH STOCK ASSEMBLY
Abstract
A stock assembly and related method are provided. The stock
assembly can include a base that can be joined with a weapon and a
butt portion that movably extends from the base so the stock
assembly can be adjusted in length. The stock can include an
adjustment limiter configured to stop extension of the butt portion
at a predetermined length, which can be set by a user to fit their
stature. The butt portion can include a longitudinal axis and a
limiter surface offset at an angle relative to the axis. The
adjustment limiter can be a wedge that wedges against the limiter
surface to set the stock assembly at the predetermined length,
thereby automatically setting that length in a consistent and
repeatable manner. A lock, separate from the adjustment limiter,
can selectively lock the butt portion in a fixed position as or
after the stock assembly attains the predetermined length.
Inventors: |
Ding; Tai-lai; (Northville,
MI) ; Yu; Tat Shing; (Plymouth, MI) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Leapers, Inc. |
Livonia |
MI |
US |
|
|
Family ID: |
1000004640379 |
Appl. No.: |
16/742175 |
Filed: |
January 14, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F41C 23/04 20130101;
F41C 23/14 20130101 |
International
Class: |
F41C 23/14 20060101
F41C023/14 |
Claims
1. A stock assembly comprising; a base including a first end
configured to be joined with a weapon and to protrude rearward from
the weapon; a butt portion slidably joined with the base, the butt
portion including a shoulder engagement element distal from the
base, the butt portion biased to extend away from the first end; an
adjustment limiter interposed between the base and the butt portion
to limit the extension of the butt portion away from the first end,
the adjustment limiter operable in an adjustment mode in which the
butt portion is free to extend away from the first end, and a
limiting mode, in which the butt portion is not free to extend away
from the first end; and a lock interposed between the base and the
butt portion, the lock operable in a locked mode in which the lock
selectively maintains the butt portion in a fixed position relative
to the base, and an unlocked mode, in which the butt portion is
free to be biased away from the first end, wherein the adjustment
limiter wedges against a limiter surface to automatically stop
extension of the butt portion away from the first end.
2. The stock assembly of claim 1, wherein the butt portion
automatically moves away from the first end when the adjustment
limiter is in the adjustment mode and the lock is in the unlocked
mode.
3. A stock assembly comprising; a base including a first end
configured to be joined with a weapon and to protrude rearward from
the weapon; a butt portion slidably joined with the base, the butt
portion including a shoulder engagement element distal from the
base, the butt portion biased to extend away from the first end; an
adjustment limiter interposed between the base and the butt portion
to limit the extension of the butt portion away from the first end,
the adjustment limiter operable in an adjustment mode in which the
butt portion is free to extend away from the first end, and a
limiting mode, in which the butt portion is not free to extend away
from the first end; and a lock interposed between the base and the
butt portion, the lock operable in a locked mode in which the lock
selectively maintains the butt portion in a fixed position relative
to the base, and an unlocked mode, in which the butt portion is
free to be biased away from the first end, wherein the butt portion
includes a longitudinal axis, wherein the adjustment limiter
includes a wedge that wedges against a limiter surface of the butt
portion, wherein the limiter surface is offset at an angle relative
to the longitudinal axis.
4. The stock assembly of claim 3, wherein the wedge defines an
aperture, wherein the wedge includes a wedge engagement surface,
wherein the wedge engagement surface slidably engages the limiter
surface.
5. The stock assembly of claim 4 comprising: a fastener that
extends through the aperture defined by the wedge, wherein the
fastener is joined with the base in a static position so that the
wedge is fixed and nonmoveable relative to the base in the limited
mode.
6. A stock assembly comprising; a base including a first end
configured to be joined with a weapon and to protrude rearward from
the weapon; a butt portion slidably joined with the base, the butt
portion including a shoulder engagement element distal from the
base, the butt portion biased to extend away from the first end; an
adjustment limiter interposed between the base and the butt portion
to limit the extension of the butt portion away from the first end,
the adjustment limiter operable in an adjustment mode in which the
butt portion is free to extend away from the first end, and a
limiting mode, in which the butt portion is not free to extend away
from the first end; a lock interposed between the base and the butt
portion, the lock operable in a locked mode in which the lock
selectively maintains the butt portion in a fixed position relative
to the base, and an unlocked mode, in which the butt portion is
free to be biased away from the first end, wherein the adjustment
limiter includes a wedge threadably joined with a fastener that
supports the wedge adjacent a ramped surface against which the
wedge can selectively frictionally interface to transition the
adjustment limiter from the adjustment mode to the limiting
mode.
7. The stock assembly of claim 6, wherein the fastener is joined
with the base to hold the wedge in a fixed position relative to the
base, while remaining selectively movable relative to the ramped
surface.
8. A stock assembly comprising; a base including a first end
configured to be joined with a weapon and to protrude rearward from
the weapon; a butt portion slidably joined with the base, the butt
portion including a shoulder engagement element distal from the
base, the butt portion biased to extend away from the first end; an
adjustment limiter interposed between the base and the butt portion
to limit the extension of the butt portion away from the first end,
the adjustment limiter operable in an adjustment mode in which the
butt portion is free to extend away from the first end, and a
limiting mode, in which the butt portion is not free to extend away
from the first end; a lock interposed between the base and the butt
portion, the lock operable in a locked mode in which the lock
selectively maintains the butt portion in a fixed position relative
to the base, and an unlocked mode, in which the butt portion is
free to be biased away from the first end; a limiter surface offset
at an angle relative to a longitudinal axis of the butt portion,
the limiter surface having a length between a first end and a
second end; a lateral surface disposed opposite the limiter surface
across the longitudinal axis, with a slot being defined between the
limiter surface and the lateral surface; and a fastener joined with
the adjustment limiter and projecting within the slot, wherein the
fastener is configured to hold the adjustment limiter a preselected
distance from the limiter surface so that as the butt portion
extends away from the first end of the base, the adjustment limiter
does not engage the limiter surface for a portion of the length
near the second end, but does engage the limiter surface as the
adjustment limiter nears the first end.
9. The stock assembly of claim 1, wherein the lock includes a
toggle pivotably joined with the base, wherein the toggle includes
a tooth, wherein the lock includes a plurality of recesses defined
by the butt portion, wherein the tooth fits in at least one of the
plurality of recesses when the lock is in the locked mode, wherein
the tooth is removed from the plurality of recesses when the lock
is in the unlocked mode.
10. The stock assembly of claim 1 comprising: a coil spring
disposed between the base and the butt portion, the coil spring
biasing the butt portion to extend away from the first end.
11.-20. (canceled)
21. The stock assembly of claim 1, wherein the lock is distal from
the adjustment limiter, wherein the stock assembly is set at a
predetermined length when the adjustment limiter wedges against the
limiter surface.
Description
BACKGROUND OF THE INVENTION
[0001] The present invention relates to firearms, and more
particularly to an adjustable length stock assembly for a
firearm.
[0002] Many modern sporting and military firearms include a stock
that extends rearward from the firearm. The stock typically
includes a forward portion that connects to a receiver of the
firearm, and a rearward portion that is shaped and distanced from
the receiver of the firearm so that a user can engage the rearward
portion against the user's shoulder and stabilize the firearm. Some
stocks are adjustable in length to accommodate individuals of
different statures. Other stocks are foldable so that a user can
fold the stock forward alongside or over the receiver. Adjustable
length stocks typically include a lever or pin that a user
manipulates to release a sliding portion of the stock. The user
grasps the sliding portion and manually moves it to a desired
position so that the stock is of a desired length. The user
releases the lever or pin to lock the stock in that position, thus
fixing the length of the stock.
[0003] Although these types of adjustable stocks provide adequate
adjustment, they are hard to manipulate because two hands are
usually required to hold the pin and simultaneously slide the
stock. The use of two hands limits the positions in which the user
can make the adjustment. Many of these types of adjustable stocks
also do not enable the user to deploy the stock to a desired length
from a shorter length very quickly or consistently.
[0004] Accordingly, there remains room for improvement in the field
of adjustable length stocks for firearms.
SUMMARY OF THE INVENTION
[0005] A stock assembly and related method of use are provided. The
stock assembly can include a base that can be joined with a weapon
and a butt portion that movably extends from the base so the stock
assembly can be adjusted in length. The stock can include an
adjustment limiter that automatically stops extension of the butt
portion when the stock assembly is of a predetermined length, which
can be set by a user to fit their stature.
[0006] In one embodiment, the butt portion can include a
longitudinal axis and a limiter surface offset at an angle relative
to the axis. The adjustment limiter can be a wedge that wedges
against the limiter surface to stop extension of the butt portion
relative to the base, to set the stock assembly at the
predetermined length, thereby automatically setting that length in
a consistent and repeatable manner.
[0007] In another embodiment, the stock assembly can include a lock
separate from the adjustment limiter that can selectively lock the
butt portion in a fixed position after the stock assembly is at the
predetermined length. The lock can include a toggle that pivots
about an axis from a locked position to an unlocked position.
[0008] In still another embodiment, the toggle can be pivotally
joined with the base or the butt portion. The toggle can include a
tooth and multiple recesses can be defined by the other of the base
or the butt portion. The tooth can fit in at least one of the
recesses when the lock is in the locked mode. The tooth can be
removed from the recesses when the lock is in the unlocked mode to
allow the butt portion to move and extend relative to the base. In
some cases, the butt portion still can be limited to extend to the
predetermined length by the adjustment limiter.
[0009] In yet another embodiment, the butt portion can be biased to
extend from the base to increase the stock assembly length. The
stock assembly can include a bias element, for example, a spring,
to perform this function. The spring can be an elongated coil
spring disposed in a bore defined by at least one of the base and
the butt portion. The spring can be under compression and with its
stored energy, can push the butt portion away from a first end of
the base that attaches to the weapon, thereby extending the stock
assembly.
[0010] In a further embodiment, the stock assembly can include a
fastener joined with the adjustment limiter. The fastener can hold
the adjustment limiter a preselected distance from the limiter
surface so that as the butt portion extends toward the first end of
the base, or as the butt portion generally retracts relative to the
base, the adjustment limiter does not engage the limiter surface
for a portion of the length. The moving limiter surface will come
even closer to the adjustment limiter as the butt portion extends
relative to the base.
[0011] In still a further embodiment, the fastener can be secured
to the wedge and to the base to prevent the wedge from moving
substantially relative to the base when the butt portion extends
relative to the base. The fastener itself can be threaded through
or with the wedge so that the wedge cannot move relative to the
longitudinal axis, so that a body of the butt portion can move
along a path substantially parallel to the longitudinal axis.
[0012] In yet a further embodiment, the fastener can extend through
a slot defined by the base and through the wedge. The fastener can
move relative to the slot when the butt portion is extended or
retracted relative to the base. For example, the fastener can
remain stationary relative to the base, while the slot and its
associated butt portion moves relative to the fastener and wedge.
When the limiter surface eventually contacts the wedge, the two
items wedge or frictionally engage one another so the butt portion
cannot be extended any farther. In some cases, however, the wedge
can be disengaged from the limiter surface, so the butt portion can
be retracted relative to the base and the overall length of the
stock assembly shortened.
[0013] In even a further embodiment, the base can include a first
end configured to attach to the weapon. The first end can include a
folding joint with a pivot axis and an attachment portion. The
attachment portion can join directly to the weapon. The folding
joint can allow the remainder of the base and the butt portion to
fold about the pivot axis so that the butt portion can be folded
forward and/or adjacent the remainder of the weapon. In this
configuration, the shoulder part of the butt portion can be forward
of the folding joint, rather than behind it, rearward of the
weapon.
[0014] In another further embodiment, a method of using the stock
assembly is provided. The method can include providing a base and a
butt portion movably joined with the base; extending the butt
portion to a first length at which the butt portion is
substantially retracted; setting an adjustment limiter at a first
setting in which its surface is a first distance from a limiter
surface; extending the butt portion so the adjustment limiter
engages the limiter surface so the stock assembly is set at a
predetermined length; and optionally locking a lock to a locked
mode in which the lock selectively locks the butt portion in a
fixed position relative to the base.
[0015] In yet a further embodiment, a method can include providing
a stock assembly having a base attached to a weapon and a butt
portion; unlocking the butt portion relative to the base;
automatically extending the butt portion relative to the base with
a bias element that urges the butt portion away from the weapon;
limiting the amount of extension via an adjustment limitation
collapsing and/or engaging a limitation surface so that extension
of the butt portion automatically stops with the stock assembly at
a predetermined length; and locking the butt portion relative to
the base so that the stock assembly is retained at or near the
predetermined length.
[0016] The current embodiments of the stock assembly and related
method provide benefits in adjusting an overall length of a stock
assembly on a weapon that previously have been unachievable. For
example, where the stock assembly includes a bias element
interposed between the base in the butt portion, the bias element
can assist in rapidly and/or automatically extending the stock
assembly to increase its length. Where the stock assembly includes
the lock, that lock can rapidly and efficiently lock the butt
portion in a fixed, locked mode relative to the base to ensure the
length of the stock assembly remains fixed at some predetermined
length. Where the stock assembly includes the adjustment limiter, a
user can set the adjustment limiter to a preferred position so that
the user can automatically set the length of the stock assembly to
a predetermined length because the adjustment limiter can be set to
store or repeat the amount of extension to establish that length.
The user thus can rapidly and efficiently deploy the stock assembly
to a custom length to fit a particular stature of a user of the
stock assembly and associated weapon.
[0017] These and other objects, advantages, and features of the
invention will be more fully understood and appreciated by
reference to the description of the current embodiment and the
drawings.
[0018] Before the embodiments of the invention are explained in
detail, it is to be understood that the invention is not limited to
the details of operation or to the details of construction and the
arrangement of the components set forth in the following
description or illustrated in the drawings. The invention may be
implemented in various other embodiments and of being practiced or
being carried out in alternative ways not expressly disclosed
herein. Also, it is to be understood that the phraseology and
terminology used herein are for the purpose of description and
should not be regarded as limiting. The use of "including" and
"comprising" and variations thereof is meant to encompass the items
listed thereafter and equivalents thereof as well as additional
items and equivalents thereof. Further, enumeration may be used in
the description of various embodiments. Unless otherwise expressly
stated, the use of enumeration should not be construed as limiting
the invention to any specific order or number of components. Nor
should the use of enumeration be construed as excluding from the
scope of the invention any additional steps or components that
might be combined with or into the enumerated steps or
components.
BRIEF DESCRIPTION OF THE DRAWINGS
[0019] FIG. 1 is a side view of the stock assembly of a current
embodiment, shown mounted on a weapon rearward of a receiver in an
unfolded first extended mode;
[0020] FIG. 2 is a second side view of the stock assembly in a
folded first extended mode;
[0021] FIG. 3 is a partial section view of the stock assembly
showing a bias element that extends a butt portion relative to a
base of the stock, as well as a lock that holds the butt portion in
a fixed position;
[0022] FIG. 4 is a partial section view of the stock assembly
showing the lock that holds the butt portion being released so that
the butt portion can be adjusted to change the length of the stock
assembly from a first length of it in the first extended mode;
[0023] FIG. 5 is a partial section view of the stock assembly
showing the lock that holds the butt portion released with the butt
portion adjusted so the stock assembly attains a second length, or
predetermined length, in a second extended mode;
[0024] FIG. 6 is a partial section view of the stock assembly
showing the lock that holds the butt portion locked again so the
stock assembly retains the second length, or predetermined length,
in a second extended mode;
[0025] FIG. 7 is a partial section view of the stock assembly
showing an adjustment limiter associated with the base and the butt
portion that limits the adjustment of length of the stock
assembly;
[0026] FIG. 8 is a partial section exploded view of the adjustment
limiter;
[0027] FIG. 9 is a partial section view of the adjustment limiter
in a first adjustment mode to limit the adjustment of the length of
the stock assembly to a second length in a second extended
mode;
[0028] FIG. 10 is a partial section view of the adjustment limiter
in a second adjustment mode to limit the adjustment of the length
of the stock assembly to a third length, or another predetermined
length, in a third extended mode before the adjustment to the third
length is performed; and
[0029] FIG. 11 is a partial section view of the adjustment limiter
in the second adjustment mode limiting the adjustment of the length
of the stock assembly to the third length, or another predetermined
length, in the third extended mode.
DESCRIPTION OF THE CURRENT EMBODIMENTS
[0030] A current embodiment of the stock assembly is illustrated in
FIGS. 1-11 and generally designated 10. The stock assembly 10 is
configured to secure to a receiver or frame 91 associated with a
weapon 90, such as a firearm or other projectile shooting device.
In some cases, the weapon can be a sporting, military or hunting
rifle, for example an AK47, an AR15, variants thereof and other
firearm systems. More generally, the weapon can be in the form of a
firearm, including, but not limited to a handgun, for example, a
pistol and/or a revolver; a rifle, for example, a long rifle, a
carbine, an assault rifle, a bolt pump rifle or a battle rifle; a
shotgun of any gauge; and/or a machine gun, for example, a machine
pistol, a light machine gun, a mini gun, a medium machine gun or a
heavy machine gun. The firearm can include any type of action, for
example, bolt action, lever action, pump action and/or break
action. The firearm can be single shot, automatic and/or
semiautomatic. Further optionally, the firearm can be in the form
of a vehicle-mounted weapon, mounted directly to the vehicle, a
watercraft or other mode of transportation of course. As used
herein, firearm also can include cannons, howitzers, handheld
rocket launchers and similar weaponry, as well as equipment such as
paint ball markers and air rifles such as bb guns, air soft guns
and/or pellet guns. The weapon also can be in the form of a bow,
such as a crossbow or other archery bow with a handle and/or
stock.
[0031] The stock assembly 10 in FIGS. 1 and 2 is joined with a
rearward part 92 of a weapon 90, which can be the form of an AK47,
as shown, or other weapons as mentioned above. The stock assembly
10 can extend rearward from the frame 91, in a direction opposite a
barrel 93 of the weapon. The stock assembly 10 can be joined with
the rearward part 92 of the weapon at a first end 11 of the stock
assembly 10, which can be opposite a second end 12 of the stock
assembly, optionally including a shoulder engagement element 18 as
described below. Optionally, the first end 11 can include a folding
joint 20 with a pivot axis 23 and an attachment portion 21. The
attachment portion 21 can join directly to the weapon, for example
the rearward part 92 or generally to the frame or receiver 91. This
attachment can be via a fastener, clamp, friction fit, a direct
weld or other integration into the receiver or frame at the
rearward part of the weapon. The folding joint 20 can allow the
base 30 and the butt portion 40 to fold about the pivot axis 23,
generally making the illustrated stock assembly a folding stock. Of
course, where the joint is not included, the stock assembly can be
a fixed, non-folding stock assembly.
[0032] When in the form of a folding stock, the stock assembly 10
can be configured in an extended mode shown in FIG. 1, where the
base 30 and butt portion 40 extend generally rearward from the
rearward part 92 of the frame or receiver 91. With the folding
joint 20, a user can depress a button 24 that releases a latch so
that the base 30 and its associated butt portion 40 can be folded
forward and/or adjacent the remainder of the weapon as shown in
FIG. 2. There, the stock assembly 10 is placed adjacent the frame
91, rather than rearward of it, as in the extended mode shown in
FIG. 1. In the folded mode of FIG. 2, the shoulder engagement
element 18 of the butt portion 40 can be forward of the folding
joint 20, rather than behind it and rearward of the weapon 90 when
the stock assembly is in the extended mode.
[0033] Turning now to FIGS. 3-6, the stock assembly and its length
adjusting components will now be described. As shown in FIG. 3, the
stock assembly 10 can include the base 30 and the butt portion 40.
The butt portion 40 can be slidably or otherwise movably joined
with the base 30 and configured to extend and retract relative to
the base. The butt portion can move, with regard to a base first
end 31. This first end 31 can be joined with the folding joint 20
when included, or can be joined directly to the rearward part 92 of
the weapon 90, or generally to the frame 91 in some other manner.
The base 30 can be in the form of a substantially hollow housing
having an upper wall 33 that can include a cheek surface extending
from the first end 31 to the second and 32. The base 30 can include
opposing side walls 35 and 36 that extend downward from the cheek
surface 33. Of course, one of these sidewalls can be deleted.
Further, these sidewalls can be outfitted with multiple holes to
reduce the overall weight of the base. Optionally the base and butt
portion can be constructed from metal, polymers, composites or
combinations of the foregoing. The base again can extend from the
first end 31 to the second end 32. As described below, the second
end 32 optionally can form a stop against which a stop portion 43
of the butt portion 40 engages to optionally limit the retraction
of the butt portion 40 relative to the base 30, and thus limit the
or set the shortest overall length OL1 of the stock assembly 10,
versus the adjustment limiter 70 setting the shortest overall
length as described below.
[0034] As shown in FIG. 3, the base can include a bias element 50.
This bias element optionally can be joined with the various walls
33, 35, 36 of the base 30 or generally can be associated with the
base and/or the first end 11 of the stock assembly 10 or other
components thereof. As shown, a rod or shaft 51 can extend from the
first end 31 of the base. The rod can include a larger diameter
portion 52 and a smaller diameter portion 53. The rod can extend
toward the butt portion 40 and can be disposed at least partially
within a bore 40 be of the butt portion 40.
[0035] The bias element 50 can be journaled on the rod 51. The bias
element 50 can optionally be in the form of an elongated coil
spring. This elongated coil spring can be disposed over the smaller
diameter portion 53 of the rod 51. The bias element 50 can include
a first end 54 and a second end 55. The first end 54 can abut
against a shoulder 54S, where the rod changes dimension. The second
end 55 can abut against a wall 40BW of the bore 40B or some other
component of the butt portion. The coil spring 50 can be disposed
linearly in the bore 40B of the butt portion. This spring 50 can
generally be aligned with and/or parallel to the longitudinal axis
LA of the stock assembly 10 when the stock assembly is in the
extended, unfolded condition shown for example, in FIG. 3. Although
shown as an elongated coil spring, the bias element 50 can be in
the form of a compressible gas cylinder, and elastomeric member, a
system of leaf springs, or other spring or gas-filled elements.
[0036] The spring shown in FIG. 3 can be in a compressed state, in
which it is storing energy. Thus when the butt portion 40 is free
to slide or move relative to the base and the first end of the
stock assembly, the compressed coil spring transitions via its
stored energy to an extended state. In so doing, it transfers
energy from the spring 52 and urges the butt portion to move the
butt portion away from the first end 31 of the base and/or the
stock assembly 11 generally to transition that butt portion from a
retracted mode to an extended mode. In some cases, the spring
biases the butt portion to extend away from the first ends 11 and
31, to increase the overall length OL1 of the stock assembly 10. Of
course, in other configurations and applications, the spring 50 can
be in a stretched state storing energy such that that energy can be
used to move the butt portion 40 relative to the base as desired in
the particular application. Further optionally, in some
applications, the bias element 50 and its components can be absent
from the stock assembly 10. In such a construction, the butt
portion 40 can be manually moved relative to the base 30.
[0037] With reference to FIGS. 3-4, the butt portion can include a
forward end portion 41 and a rearward end portion 42. The forward
end 41, also referred to as the first end 41 can be disposed
between opposing walls 35 and 36 of the base in all of the relative
orientations of the butt portion, relative to the base 30. Of
course, where the base has an open wall configuration or includes
multiple holes, that first end 41 might not always be adjacent a
wall. The second end 42 is distal from the first end 41. The second
end 42 can include the shoulder engagement element 18, which is
distal from the base and in particular the first end 31 of the base
and the first end 11 the stock assembly. Although referred to as a
shoulder engagement element, this element 18 can be configured to
engage any appendage or portion of a user's body. In some cases,
the shoulder engagement element alternatively can be a strap or
structure configured to wrap around at least a portion of a user's
appendage. For example, the shoulder engagement element 18 can be
configured to engage a forearm or arm of a handicap user who
benefits from support of the stock assembly 10 on the user's arm,
rather than against her shoulder or other portion of the body. This
second end 42 or shoulder engagement element 18 can be configured
to form a portion of a pistol brace when the weapon 90 is in the
form of a pistol. Although not shown, this shoulder engagement
element 18 or second end 42 can include straps, belts or webs to
secure the stock assembly to a user.
[0038] As shown, the shoulder engagement portion 18 can include a
shoulder pad 18P that can be configured to reduce the recoil felt
by user utilizing the weapon with the stock assembly 10. This
shoulder pad 18P can be attached via fasteners to a main body 45 of
the butt portion 40. The main body 45 can extend downward a
distance from an upper portion 44U of the butt portion 40. The body
45 can define a perimeter wall or projection 46 within which or
against which the end 32 or edge of the base can enter, fit and/or
set flush. The body 45 can include a forward engagement surface 47
that can be manually engaged by user to extend and to retract the
butt portion 40 relative to the base 30.
[0039] Optionally, the body 45 can define a portion of the bore 40B
within which the bias element 50 can be disposed. Of course, where
the base defines a bore as well as the butt portion, the bias
element 50 can extend at least partially in that bore and/or the
bore 40B.
[0040] The body 45 can cooperate with and/or include form a portion
of the lock 60 and the adjustment limiter 70. The lock 60 can be
distal from the adjustment limiter 70, and optionally can be
disposed below the adjustment limiter 70. The lock can be separate
and independent from the adjustment limiter 70 and its components.
Each of these elements, for example, the lock and the adjustment
limiter can function and/or can be manipulated separately and apart
from one another. The lock 60 can be interposed between the base
and the butt portion. The lock can be operable in a locked mode
shown in FIG. 3 in which the lock selectively maintains the butt
portion in a fixed position relative to the base. The lock 60 also
can be operable in an unlocked mode, for example, as shown in FIGS.
4-5, where the butt portion 40 is free to extend and retract
relative to the base. The butt portion also can be free to be
biased away from the first end 31 or 11 via the bias element 50,
when the bias element is optionally included in the stock assembly
10, and when the lock is in the unlocked mode.
[0041] The lock 60 can include a projection or a tooth 62T that can
be manipulated to engage one or more of multiple recesses 60R that
can be associated with or defined by the body 45 of the butt
portion 40. The tooth 62T can fit within any one of the recesses
60R when the lock is in the locked mode. The tooth can enter or fit
within such recess to prevent relative movement of the butt portion
40 relative to the base, or generally inhibit or stop extension and
retraction of the butt portion. The tooth 62T can be removed from
the recesses 60R when the lock is in the unlocked mode. In such
case, the butt portion 40 can be free to move relative to the base
30 and to the first end 31 of the base, but optionally only in
those cases where the adjustment limiter is also not limiting
movement of the butt portion relative to the base and/or the first
end 31 of the base as described below.
[0042] The lock 60 can include a toggle 60T pivotally joined with
the base and rotatable about a pivot axis 60A. The toggle 60T can
be biased via another bias element (not shown) to urge the toggle
60T to rotate in direction R about that axis 60A. This can ensure
that the tooth 62T by default registers in a recess of the recesses
60 for example, the recess 60R1. As shown, the toggle can include a
button 61 and an arm 62 that extends to the tooth 62T or otherwise
forms a portion of that tooth. The button and tooth can be disposed
on opposite sides of the axis 60A from one another. The button 61
can be manually depressed by user to rotate the toggle 60T in a
direction R2 (FIG. 4) opposite direction R and thereby withdraw the
tooth 62T from a recess 60R, for example the recess 60R1 in FIG. 3
to release or convert the lock 60 to an unlocked mode.
[0043] An example of the operation of the lock 60, is shown in
FIGS. 3-6, which show a sequence where a the stock assembly 10 is
converted to extend the butt portion 40 from the base. The lock is
first in a locked mode shown in FIG. 3, then converted to an
unlocked mode shown in FIGS. 4-5, and then converted to a locked
mode again, for example a second locked mode, shown in FIG. 6, with
the overall length converted from a short length OL1 (FIG. 3) to a
longer or greater length OL2 (FIG. 6) of the stock assembly 10.
[0044] To extend the butt portion, the lock 60 can be engaged by a
user manually depressing the button 61 with a force F as shown in
FIGS. 3-4. This manual depression counters the force exerted by
spring of the lock and moves the toggle to rotate about the axis
60A in a direction R2 shown in FIG. 4. As a result, the tooth 62T
is withdrawn from the recess 60R1. Upon such withdrawal, the butt
portion 40 is pushed via the bias element 50 to extend outward to
increase the overall length of stock assembly 10 to the second
length OL2 in FIG. 5, which again can be set via the adjustment
limiter 70 as described below. While the butt portion is free to be
extended, moved or generally biased away from the first end, the
lock is generally in the unlocked mode shown in FIGS. 4-5. After
the stock assembly 10 is extended to the second length OL2, the
toggle can be released such that the lock rotates in direction R
about the axis 60A. As a result, the tooth 62T registers in another
recess for example 60R4, or some other recess 60R with which the
adjustment limiter has aligned the locking tooth to set a
particular predetermined length of the stock assembly.
[0045] With reference to FIGS. 7-11, the adjustment limiter 70 will
be described in further detail. The adjustment limiter 70
optionally can include a wedge 75 that is configured to wedge
against a limiter surface 48 of the butt portion 40. The wedge 75
can include a wedge engagement surface 75S that can slidably engage
the limiter surface 48. The limiter surface 48 can be associated
with the body 45 of the butt portion. The limiter surface 48 can be
offset at an angle A2 relative to the longitudinal axis LA of the
base and/or stock assembly, and optionally nonparallel to the
longitudinal axis LA. The limiter surface can extend away from the
longitudinal axis LA as it approaches the first end 41 of the butt
portion 40. The angle A2 can be optionally at least 1.degree., at
least 2.degree., at least 3.degree., between 1.degree. and
5.degree., inclusive, between 0.degree. and 20.degree., between
0.degree. and 45.degree., inclusive, between 1.degree. and
15.degree., inclusive, or other angles, offset relative to the
longitudinal axis LA.
[0046] The base body 45 also can include an opposing lateral
surface 49 on the opposite side of longitudinal axis LA8. This
lateral surface 49, can be substantially parallel to the
longitudinal axis LA. For example this lateral surface 49 can be
offset at an angle A1 that is 0.degree. offset relative to the
longitudinal axis LA. Of course, this lateral surface 49 can be
offset at some other angle A1 depending on the application. This
lateral surface 49 can be nonparallel to the limiter surface 48.
Although shown as a linear surface, the limiter surface 48
optionally can be rounded, contoured, stepped or differently angled
or contoured, depending on the location and the interface of that
limiter surface with the wedge 75.
[0047] The wedge 75 can include the wedge engagement surface 75S.
The wedge 75 also can include a guide 75G. This guide 75G can fit
within a slot 45 asked defined by the body 45. This guide 70 5G can
engage the upper and lower walls of the slot 45S and/or generally
touch them yet still allow the butt portion 40 to extend or retract
relative to the base 30. The guide 75G can extend from a flange 75P
that can be wider and/or taller than the guide, so that the guide
75G can rest and slide in the slot 45S, while the flange 75P does
not allow the remainder of the wedge to enter the slot 45S. Thus,
the flange 75P can engage the limiter surface 48 above and below
the slot. For example, the flange can include an upper flange that
engages the upper limiter surface 48U, and a lower flange that
engages the lower limiter surface 48L, while the guide is movably
disposed in the slot 45S. Of course, in some cases, the limiter
surface 48 can be a single uniform surface and the wedge can be
configured accordingly to engage that limiter surface is described
below.
[0048] As shown, the wedge engagement surface can be parallel to
the longitudinal axis LA. Optionally, however, the wedge engagement
surface can be angled relative to that axis LA. In other
embodiments, the wedge can include rounded or contoured surfaces to
engage the limiter surface. The wedge optionally can be configured
as a cam to engage the limiter surface in other configurations.
[0049] The wedge 75 shown in FIG. 8 can define an aperture 75A
which optionally can extend through the guide 75G or a central
portion of the wedge. This aperture 75 can be threaded. The
adjustment limiter 70 also can include a fastener 80 which can
extend through the aperture 75 defined by the wedge. The fastener
can be threaded to thread into the wedge. In general, the fastener
can be joined with the base 30 in a static configuration. The
fastener can hold the wedge 75 in a fixed, nonmoving position
relative to the base. Optionally, the wedge and fastener in this
"fixed position" can be slightly movable with some tolerances or
slop in the manner the fastener attaches to the base. The wedge can
be held by the fastener in the fixed position relative base, with
the wedge remaining selectively movable relative to the limiter
surface 48, (or vice versa) which sometimes is referred to as a
ramped surface due to its ramping and/or angling or offset
configuration relative to the longitudinal axis LA.
[0050] The fastener 80 can include a fastener head 80A and a
fastener shaft 80S that can be threaded. The fastener shaft 80S can
engage the aperture 75 optionally with corresponding threads. The
fastener head 80H can include a shoulder 81 that is configured to
engage against the perimeter of a hole 36H in the sidewall 36 of
the base. The shoulder 81 can be configured so that it frictionally
engages the hole 36H, but can spin freely relative to that hole
when a tool engages the drive feature 80D of the head 80H. The
fastener 80 and the shaft 80S can extend through the slot 45S
defined by the body 45. Generally, the fastener is disposed between
the upper portion 48U of the limiter surface and the lower portion
48L of the limiter surface.
[0051] The fastener 80 optionally can include a nut 82 that is
adjacent the opposing side wall 35. This nut 82 can be threaded to
receive a portion of the fastener 80S shaft extending beyond the
wedge. The nut 82 can be disposed in another hole 35H defined by
the sidewall 35. The hole can be configured so that the nut 82 can
free spin relative to the sidewall 35. Thus, both the head in the
nut 82 of the fastener 80 can free spin relative to the respective
walls of the base. In this manner, when the fastener 80 is rotated,
for example with a drive tool in the drive feature 80D, the
fastener and nut 82 can free spin relative to the sidewalls.
Simultaneously, however, the wedge 75 threads onto or off from the
shaft, moving closer to the limiter surface or farther away from
the limiter surface 48, depending on the direction of rotation,
that is, clockwise or counterclockwise. For example by rotating the
fastener clockwise, the wedge 45 moves in direction R3 away from
the limiter surface 48. By rotating the fastener counterclockwise
CCW, the wedge 48 moves in direction RL, toward the limiter surface
48.
[0052] The fastener can be joined with the base to hold the wedge
in a fixed position relative to the base, while remaining
selectively movable relative to the ramped surface or limiter
surface 48. The nut 82 optionally can be held in place via a pin 84
that is biased in a bore by a spring 85 against the nut 82. This
pin 84 can engage a groove 83 defined in the nut to allow the nut
82 to free spin relative to the base while the wedge 75 is being
adjusted toward or away from the limiter surface 48. Optionally,
the fastener does not include the nut, and is simply threaded into
the wedge. In some cases, the fastener might not extend through the
slot or to the wall 35.
[0053] The limiter surface or ramped surface 48 can have a length
LL between a first end 48E1 and a second end 48E2. The first end
48E1 can be closer to the first end 31 of the base 30 regardless of
the position of the butt portion 40 relative to the base 30. The
fastener 80 can hold the wedge or more generally the adjustment
limiter, a preselected distance D1 (FIG. 8) from the limiter
surface 48. The fastener can hold the flange 75P a distance from
the upper 48U and lower 48L limiter portions based on the
engagement of the threads with the threaded aperture of the
wedge.
[0054] The fastener can selectively position the wedge and its
wedge engagement surface 75S away from the limiter surface. As the
butt portion 40 extends away from the first end 31 of the base, the
adjustment limiter, in particular the wedge engagement surface 75S
does not engage the limiter surface 48 along a portion of the
length LL near the second end 48E2. As the butt portion 40 extends,
however, and the limiter surface 48 moves relative to the wedge 75,
eventually, the wedge engagement surface and the wedge in general
does engage the limiter surface 48 as the wedge effectively nears
the first end 48E1 of the limiter surface. As described below,
eventually, the wedge frictionally engages the wedge against the
limiter surface 48 to restrict, inhibit and/or stop further
movement of the butt portion relative to the base. As the butt
portion extends, the fastener moves relative to the slot, even
though the slot is the item that is moving, generally outward and
away from the first end 31 of the base. The portion of the body 45
around the slot 45S moves because the butt portion itself and its
body 45 move away from the first end 31 upon extension of the butt
portion, optionally under the force of the bias element 50. As a
result of this movement of the body, the slot and the butt portion,
the fastener 80 extending in the slot moves relative to the same
elements and vice versa.
[0055] With reference to FIGS. 7-11, the adjustment limiter 70 is
operable in an adjustment mode in which the butt portion 40 is free
to extend away from and/or move relative to the first ends 11, 31
of the base and/or stock assembly, and also is operable in a
limiting mode, in which the butt portion is not free to extend away
from the first ends 11, 31 of the base and/or stock assembly.
Examples of the adjustment mode and limiting mode are shown in the
figures. For example, starting with FIG. 7, the wedge 75 can be
disposed a distance D2 away from the limiter surface 48, in
particular, the wedge engagement surface 75S can be disposed a
distance D2 away from the limiter surface 48. A user can engage the
fastener 80 with a drive tool and rotate the fastener, for example,
in a clockwise CW manner. As a result, the wedge 75 is drawn closer
to the head 80H of the fastener 80. In turn, this moves the wedge
engagement surface 75S farther away from the limiter surface 48.
Optionally, in the position shown in FIG. 7, the butt portion 40
can be locked relative to the base 30 when this occurs. The
fastener 80 can be rotated until the distance D2 is achieved, this
movement of the fastener also can move the wedge away from the
longitudinal axis.
[0056] The distance D2 of the wedge engagement surface from the
limiter surface corresponds to and/or effectively sets a
predetermined length OL2 of the stock assembly 10. With this
adjustment limiter now set in a particular limiting mode, when the
lock 60 is activated to an unlocked mode, the spring or bias
element 50, stored in a compressed figuration, then exerts a force
on the butt portion 40 as shown in FIG. 9 to extend the butt
portion 40 away from the first ends 11, 31, generally extending the
butt portion 40, the body 45 and corresponding features away from
the base 30 in direction D1. The adjustment limiter, in particular,
the wedge engagement surface (or some other surface when the wedge
is of a different construction) will engage the limiter surface 48
when the butt portion 40 has extended to the predetermined length
OL2. In particular, the wedge engagement surface 75S, optionally
the upper and lower flanges 75P will engage the respective upper
and lower limiter surfaces. When this occurs, or generally when
part of the wedge engages the limiter surface, the wedge
frictionally engages or wedges against the limiter surface, and
prevents or inhibits the limiter surface from moving farther
relative to the surfaces of the wedge. As a result of the limiter
surface being part of the body 45, which is itself a portion of the
butt portion 40, the butt portion will not extend any farther. In
turn, the butt portion is limited to extend from the base so that
the length of the stock assembly is of the predetermined length
shown in FIG. 9. Optionally, the wedge 75 frictionally engages the
limiter surface 48 at a first location L1 along the limiter surface
48. Thus, the length of the stock assembly will not increase beyond
the predetermined length OL2, even when the spring or bias element
50 urges the butt portion 42 extend from the base. When the
adjustment limiter so engages the butt portion, it restricts
movement of the butt portion relative to the base. The adjustment
limiter is in this limiting mode because it effectively limits the
movement of the butt portion relative to the base and vice versa.
Further optionally, after or while the adjustment limiter is in
limiting mode, the lock 60 can be actuated or released so that its
structure engages the butt portion to effectively block the butt
portion relative to the base, while the length of the stock is of
the predetermined length OL2. Thus, the butt portion is set to stop
at the extended position shown in FIG. 9 via the adjustment
limiter, but also further locked in place at that length due to
interaction of the lock with the butt portion. The movement of the
butt portion can be both limited and locked simultaneously. Of
course, in some cases, the lock might not perfectly register with
the corresponding structure of the body of the butt portion due to
the adjustment limiter not inhibiting movement of the butt portion
exactly. Thus, the butt portion may need to be manually moved
slightly, for example, so that a tooth fits in a recess of the lock
or otherwise engages another lock portion. In such case, the wedge
may or may not slightly disengage from the limiter surface at the
location L1. Even in this condition, the adjustment limiter still
is considered to be in the limiting mode and considered to limit
movement of the butt portion relative to the base.
[0057] As another example of the adjustment limiter operating in
another limiting mode, reference is made to FIGS. 10-11. In FIG.
10, the adjustment limiter 70 can be set by a user to set another
predetermined length. For example, the fastener 80 can be rotated
in a clockwise manner. As a result, the wedge 75 can thread onto
the fastener, thus moving away from the limiter surface 48 in that
location. As a result, the distance of the wedge engagement surface
75S can be set at another distance D3, which can be greater than
the distance D2 above, away from the limiter surface 48. This
setting of the adjustment limiter can be performed optionally when
the butt portion is locked relative to the base. After the
adjustment limiter is rendered in this condition, the lock 60 can
be disengaged. As a result, the butt portion 40 extends relative to
the base generally away from the ends 11 and 31, in direction E2
under the force of the bias element 50. As it does so, the body 45
moves so the limiter surface 48 and slot 45S move relative to the
fastener 80 and wedge 75. The wedge, for a distance along the
limiter surface, does not engage with the wedge, however,
eventually engages the limiter surface 48 at a location L2,
dictated by the distance D2 of the wedge engagement surface 75 from
the limiter surface 48, previously set at the end 48E2. The wedge
frictionally engages the limiter surface 48 at the location L2 so
that the length of the stock assembly 10 will not increase beyond
the predetermined length OL3, even when the spring is optionally
urging the butt portion to extend from the base. As a result, the
butt portion automatically extends to the other predetermined
length OL3 without the user having to manually set that length
during the extension of the butt portion from the base. Of course,
when the adjustment limiter 70 achieves this limiting mode, to
limit the extension of the butt portion from the base, movement of
that butt portion 40 will cease. The user then can release the
optional lock and lock the butt portion 40 in a fixed position
relative to the base. The user can then operate the stock assembly
10 and weapon 90 in general. Of course, the adjustment limiter can
be set to various distances away from the limiter surface, to
thereby engage the limiter surface at multitude of locations along
the limiter surface. In doing so the adjustment limiter can
automatically set the stock assembly to a multitude predetermined
lengths according to the preference of the user. In many cases the
predetermined length can automatically be set at a length that is
less that the maximum extended length of the stock assembly.
[0058] Directional terms, such as "vertical," "horizontal," "top,"
"bottom," "upper," "lower," "inner," "inwardly," "outer" and
"outwardly," are used to assist in describing the invention based
on the orientation of the embodiments shown in the illustrations.
The use of directional terms should not be interpreted to limit the
invention to any specific orientation(s).
[0059] In addition, when a component, part or layer is referred to
as being "joined with," "on," "engaged with," "adhered to,"
"secured to," or "coupled to" another component, part or layer, it
may be directly joined with, on, engaged with, adhered to, secured
to, or coupled to the other component, part or layer, or any number
of intervening components, parts or layers may be present. In
contrast, when an element is referred to as being "directly joined
with," "directly on," "directly engaged with," "directly adhered
to," "directly secured to," or "directly coupled to" another
element or layer, there may be no intervening elements or layers
present. Other words used to describe the relationship between
components, layers and parts should be interpreted in a like
manner, such as "adjacent" versus "directly adjacent" and similar
words. As used herein, the term "and/or" includes any and all
combinations of one or more of the associated listed items.
[0060] The above description is that of current embodiments of the
invention. Various alterations and changes can be made without
departing from the spirit and broader aspects of the invention as
defined in the appended claims, which are to be interpreted in
accordance with the principles of patent law including the doctrine
of equivalents. This disclosure is presented for illustrative
purposes and should not be interpreted as an exhaustive description
of all embodiments of the invention or to limit the scope of the
claims to the specific elements illustrated or described in
connection with these embodiments. For example, and without
limitation, any individual element(s) of the described invention
may be replaced by alternative elements that provide substantially
similar functionality or otherwise provide adequate operation. This
includes, for example, presently known alternative elements, such
as those that might be currently known to one skilled in the art,
and alternative elements that may be developed in the future, such
as those that one skilled in the art might, upon development,
recognize as an alternative. Further, the disclosed embodiments
include a plurality of features that are described in concert and
that might cooperatively provide a collection of benefits. The
present invention is not limited to only those embodiments that
include all of these features or that provide all of the stated
benefits, except to the extent otherwise expressly set forth in the
issued claims. Any reference to claim elements in the singular, for
example, using the articles "a," "an," "the" or "said," is not to
be construed as limiting the element to the singular. Any reference
to claim elements as "at least one of X, Y and Z" is meant to
include any one of X, Y or Z individually, and any combination of
X, Y and Z, for example, X, Y, Z; X, Y; X, Z; and Y, Z.
* * * * *