U.S. patent application number 13/220421 was filed with the patent office on 2012-01-26 for adjustable dumbbell and system.
Invention is credited to Jason B. Luedeke, Randal L. Lundquist.
Application Number | 20120021877 13/220421 |
Document ID | / |
Family ID | 45494092 |
Filed Date | 2012-01-26 |
United States Patent
Application |
20120021877 |
Kind Code |
A1 |
Lundquist; Randal L. ; et
al. |
January 26, 2012 |
ADJUSTABLE DUMBBELL AND SYSTEM
Abstract
An adjustable weightlifting device having selectable weights.
The adjustable weightlifting device allows users to select a
desired number of weight plates, and then couples the selected
weight plates to retention members disposed in the handle of the
device.
Inventors: |
Lundquist; Randal L.;
(Mansfield, OH) ; Luedeke; Jason B.; (Delaware,
OH) |
Family ID: |
45494092 |
Appl. No.: |
13/220421 |
Filed: |
August 29, 2011 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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12471156 |
May 22, 2009 |
8007415 |
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13220421 |
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Current U.S.
Class: |
482/107 |
Current CPC
Class: |
A63B 21/075 20130101;
A63B 21/00065 20130101; A63B 21/0728 20130101 |
Class at
Publication: |
482/107 |
International
Class: |
A63B 21/072 20060101
A63B021/072 |
Claims
1. A weight lifting device, comprising: a handle having end
portions; at least one retention member slidably disposed within
said handle, said retention member longitudinally movable relative
to said handle; a locking mechanism disposed on at least one of
said end portions of said handle, said locking mechanism having a
movable pin disposed therein, said movable pin engaged with said
retention member preventing longitudinal movement of said retention
member when in a locked position; and a plurality of weights
removably attached to said retention member.
2. The weight lifting device of claim 1, wherein each said weights
includes a protrusion on a first side thereof and groove on a
second side thereof, said groove adapted to receive said protrusion
from an adjacent weight when in a stacked position.
3. The weight lifting device of claim 1, wherein said retention
member comprises a rod, an attachment member, and retention pin,
said rod preventing rotation of said retention member relative to
said handle.
4. The weight lifting device of claim 1, wherein each said weight
includes a channel, a vertical guide, and at least one retention
tab disposed within said vertical guide.
5. The weight lifting device of claim 1, further comprising a
support having at least one receptacle for receiving said locking
mechanism disposed therein, said receptacle having a locking and an
unlocking channel.
6. The weight lifting device of claim 5, wherein said locking
channel forces said movable pin into a locked position when said
locking mechanism is removed from said receptacle.
7. The weight lifting device of claim 1, wherein the movable pin is
horizontal and biased toward the locked position.
8. The weight lifting device of claim 5, wherein said unlocking
channel forces said movable pin into an unlocked position when said
locking mechanism is placed in said receptacle so as to allow
longitudinal movement of said retention member.
9. A weight lifting device, comprising: a handle having end
portions, at least one retention member slidably disposed within
said handle, said retention member longitudinally movable relative
to said handle, a plurality of weights removably attached to said
retention member; and a locking mechanism immovably interposed
between said at least one of said end portions of said handle and
said plurality of weights, said locking mechanism preventing the
longitudinal movement of said retention member when in the locked
position.
10. The weight lifting device of claim 9, wherein each said weight
has a first plate and a second plate.
11. The weight lifting device of claim 9, wherein each said plate
has plate tabs extending therefrom and plate apertures, said plate
tabs adapted to nest within said plate apertures of an adjacent
weight plate.
12. The weight lifting device of claim 9, wherein said retention
member comprises a rod, an attachment member, and a retention pin,
wherein said retention pin further includes a locking element
preventing movement of said retention pin relative to said
attachment member when in the locked position.
13. The weight lifting device of claim 12, wherein said attachment
member is attached to and extends substantially perpendicular from
said rod.
14. The weight lifting device of claim 9, further comprising a
support having at least one receptacle for receiving said locking
mechanism disposed therein, said receptacle having a locking and an
unlocking channel.
15. The weight lifting device of claim 9, wherein said locking
mechanism includes a moveable pin disposed therein, said movable
pin engaging said retention member preventing longitudinal movement
of said retention member when in a locked position.
16. The weight lifting device of claim 15, wherein when said pin is
in the unlocked position it prevents removal of the weight lifting
device from a base.
17. A weight lifting device, comprising: a base, said base
including plate rests, an adjustable dumbbell adapted to be
supported by said base, comprising: a handle having end portions,
at least one retention member slidably disposed within said handle,
said retention member longitudinally movable relative to said
handle, a plurality of weights removably attached to said retention
member and adapted to rest on said plate rests when not in use; and
a locking mechanism immovably interposed between said at least one
of said end portions of said handle and said plurality of weights,
said locking mechanism preventing the longitudinal movement of said
retention member when in the locked position.
18. The weight lifting device of claim 17, further comprising
protrusions on said plate rests adapted to align said plurality of
weight plates when not in use.
19. The weight lifting device of claim 17, further comprising a
tray tab extending from said plate rest, said tray tab preventing
removal of said adjustable dumbbell from said base when said
locking mechanism is in the unlocked position.
20. The weight lifting device of claim 17, further comprising a
locking tab associated with said retention member.
Description
CROSS REFERENCE TO RELATED APPLICATION
[0001] This application is a continuation-in-part of U.S.
application Ser. No. 12/471,156 filed May, 22, 2009, now U.S. Pat.
No. 8,007,415, which is hereby incorporated by reference, as if
fully rewritten herein.
TECHNICAL FIELD
[0002] The present invention is directed to a weightlifting device.
More particularly, exemplary embodiments of the present invention
are directed to an adjustable weight dumbbell device and system
having an internal plate retention mechanism.
BACKGROUND OF THE INVENTIVE FIELD
[0003] Many weightlifters perform a variety of exercises to build
and develop muscle. These exercises can be performed through the
use of free weights or the use of weightlifting machines. While
both free weights and weightlifting machines provide a means to
develop and build muscle, many weightlifters prefer the natural
motion afforded by the use of free weights, such as dumbbells and
barbells. The ability to move naturally allows the weightlifter a
greater degree of variety in their exercise routine and the ability
to isolate specific muscles.
[0004] Although conventional dumbbells provide the freedom desired
by weightlifters, conventional dumbbells have several drawbacks.
Many conventional dumbbells are made of a cast metal and therefore
provide the user with a fixed weight. The fixed weight dumbbells
prevent a user from adjusting the amount of weight used, thus
decreasing the amount of exercise options available to the user.
Other conventional dumbbells are provided with removable weight
plates allowing the user to adjust the weight to be lifted. These
types of dumbbells may require the clamps, brackets, screws to
secure the weight plates to the dumbbell. Although allowing the
weight to be adjusted, the attachment devices may be cumbersome and
subject to failure potentially injuring the user or others.
[0005] Advanced versions of dumbbells and barbells are devices that
have attachable weights mounted on a weight lifting bar. In these
embodiments, the weights may be prevented from falling from the bar
through the use of screws or clamps disposed outside the weights on
the bar. These devices are often inconvenient to mount onto the bar
and remove from the bar. Each of these mechanisms must be placed
separately on the bar. Another drawback of this type of weight
lifting system is the expense of purchasing separate pieces of
equipment for each different weight desired to be used by the
weightlifter.
[0006] Even more advanced versions of dumbbells and barbells are
devices that allow the user to select a desired amount of weight to
be lifted from a stack of weights. However, many of these devices
interfere with the natural movement of the user during the lifting
motion. These devices force the user to insert a hand into a cage
to lift the weight, severely limiting the movement of the user's
wrist. These devices may also be cumbersome to use. Although the
devices allow a user to select a desired amount of weight, the
width of the dumbbell and barbell may be static making the device
unstable during use. In addition, these devices offer little in the
way of safety.
SUMMARY OF THE GENERAL INVENTIVE CONCEPT
[0007] A weight lifting device of the present invention takes the
form of a handle that includes off-set passages inside the handle
and locking mechanisms attached to each end of the handle. A stack
of individual weight plates arranged adjacent to the locking
mechanisms. The weight plates are supported by a base, the base is
adapted to prevent the bottoms of the weight plates from contacting
the base.
[0008] A retention member is placed within each passage in the
handle. The retention member includes a rod having a series of
holes running down a portion of the rod and a retention bar. The
retention bar extends perpendicularly from an end of the rod. The
rod is adapted to slide and rotate within the handle. In other
exemplary embodiments the rod is adapted to slide in the handle and
prevented from rotating.
[0009] The weight plates include a vertical guide, a channel and a
retention groove. When the plates are stacked and supported in the
base the vertical guides and channels of each plate are aligned
allowing the retention member to pass through the plates. The
vertical guide is adapted to allow the retention bar to pass
through the plate and the channel is adapted to allow the rod to
pass through the plate.
[0010] To use the weight lifting device to exercise, a user extends
the retention member through a desired number of plates on both
ends of the device. Next the user rotates the retention bar into
the retention groove of the selected weight plate. When the
retention bar is placed in the retention groove the holes on the
rod are aligned with the locking mechanisms. The user then engages
the pin inside the locking mechanism with the aligned hole. This
prevents the rod from rotating and moving longitudinally. The
weight plate is prevented from slipping off the end of the rod by
the retention bar nested in the retention groove.
[0011] In other exemplary embodiments, the retention member
includes a rod, an attachment member and a retention pin. In this
embodiment, the rod is shaped in a manner such that it is prevented
from rotating relative to the handle and weight plates. The
attachment member is adapted to attach the retention pin to the
rod. The retention pin in this embodiment is a spring loaded pull
pin. The weight plates are adapted to receive the retention member
of this embodiment. The vertical guide in the weight plate is
adapted to slidably receive the retention pin, and a retention tab
is located in the vertical guide. The retention tab and retention
plate are each adapted to retain the selected weight plates to the
rod.
[0012] In other exemplary embodiments, the weight lifting device
may have support adapted to cradle the locking mechanisms providing
automatic locking and unlocking of the locking mechanism. In this
embodiment, the locking mechanism includes a pin extending through
the body of the locking mechanism. The locking mechanism is
positioned transverse to the rod running through the locking
mechanism.
[0013] When the locking mechanism is removed from the support, a
channel disposed in the support forces the pin to engage the rod
inside the locking mechanism preventing movement of the rod. As the
weight lifting device is lowered onto the base, and the locking
mechanisms enter the support, another channel disposed in the
support forces the pin to disengage from the rod allowing the rod
to freely slide allowing a different number of weight plates to be
selected.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In addition to the features mentioned above, other aspects
of the present invention will be readily apparent from the
following descriptions of the drawings and exemplary embodiments,
wherein like reference numerals across the several views refer to
identical or equivalent features, and wherein:
[0015] FIG. 1 is a perspective view of one exemplary embodiment of
an adjustable dumbbell of the present invention;
[0016] FIG. 2 is an exploded view of one exemplary embodiment of an
adjustable dumbbell of the present invention;
[0017] FIG. 3 is a side view of an exemplary weight plate of the
adjustable dumbbell of FIG. 1;
[0018] FIG. 4 is a side view of an exemplary weight plate of the
adjustable dumbbell of FIG. 1;
[0019] FIG. 5 is a perspective view of an exemplary handle of the
adjustable dumbbell of FIG. 1;
[0020] FIG. 6 is a perspective view of an exemplary retention
member of the adjustable dumbbell of FIG. 1;
[0021] FIG. 7 is a perspective view of an exemplary locking
mechanism of the adjustable dumbbell of FIG. 1;
[0022] FIG. 8 is a top perspective view of a second exemplary
embodiment of an adjustable dumbbell of the present invention;
[0023] FIG. 9 is a top perspective view of an exemplary weight
plate of the adjustable dumbbell of FIG. 8;
[0024] FIG. 10 is a perspective view of an exemplary retention
member of the adjustable dumbbell of FIG. 8;
[0025] FIG. 11 is a side view of an exemplary retention member of
the adjustable dumbbell of FIG. 8;
[0026] FIG. 12 is a front view of an exemplary retention pin of the
adjustable dumbbell of FIG. 8;
[0027] FIG. 13 is a front view of an exemplary locking mechanism in
the unlocked position of the adjustable dumbbell of FIG. 8;
[0028] FIG. 14 is a front view of an exemplary locking mechanism in
the locked position of the adjustable dumbbell of FIG. 8;
[0029] FIG. 15 is a top perspective view of a another exemplary
embodiment of an adjustable dumbbell according to the present
invention;
[0030] FIG. 16 is a top perspective view of a first side of an
exemplary weight plate of an exemplary adjustable dumbbell
according to the present invention;
[0031] FIG. 17 is a top perspective view of a second side of an
exemplary weight plate of an exemplary adjustable dumbbell
according to the present invention;
[0032] FIG. 18A is a side view of an exemplary retention member in
the locked position;
[0033] FIG. 18B is a side perspective view of an exemplary
retention member in the locked position;
[0034] FIG. 19A is a side view of an exemplary retention member in
the unlocked position;
[0035] FIG. 19B is a side perspective view of an exemplary
retention member in the unlocked position;
[0036] FIG. 20A is a bottom perspective view of an exemplary rod
according to the present invention;
[0037] FIG. 20B is a side view of an exemplary rod according to the
present invention;
[0038] FIG. 21 is a front view of an exemplary locking mechanism in
the locked position of the exemplary adjustable dumbbell of FIG.
15; and
[0039] FIG. 22 is a front view of an exemplary locking mechanism in
the unlocked position of the exemplary adjustable dumbbell of FIG.
15.
DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENT(S)
[0040] One exemplary embodiment of an adjustable dumbbell device 5
(adjustable dumbbell) of the present invention is illustrated in
FIG. 1, and is depicted in more detail in the exploded view of FIG.
2 and in the component drawings of FIG. 3-7. As shown, the
adjustable dumbbell 5 includes a handle 10 having opposing locking
mechanisms 12 attached to the end portions thereof. A plurality of
selectable weight plates 14 positioned adjacent to the locking
mechanisms 12. A retention member 16 is disposed within each end of
the handle 10 and extends from the handle 10 through the weight
plates 14, the purpose of which is described in more detail below.
A base 18 is also provided and includes a base plate 20, plate
rests 22 and plate guides 24 extending upwardly from the top
surface of the base plate 20.
[0041] As shown in FIG. 2, the plate rests 22 are affixed to the
top surface of the base plate 20 and extend upwardly therefrom. The
plate rests 22 are adapted to contact and support the weight plates
14. As shown in FIG. 2, the plate rests 22 may be arranged in sets
of two wherein the plate rests 22 of each set are parallel to one
another. The plate guides 24 affixed to the top surface of the base
plate 20 may extend upwardly at an angle therefrom. The angled
configuration, as seen in FIG. 2, forces the weight plates 14 onto
the plate rests 22 and into the proper stacked configuration so as
to be arranged vertically side-by-side. In other exemplary
embodiments, plate guides 24 may extend from the base plate 20 on
either end of the stacked weight plates 14. In still other
exemplary embodiments, plate guides 24 may extend from the base
plate 20 from at both ends of the stacked weight plates 14.
[0042] A weight plate of the exemplary adjustable dumbbell 5 is
depicted in FIGS. 3-4. The weight plate includes a first side 30
and a second side 32. The weight plates 14 are stacked so that the
first side 30 faces away from the handle 10 and the second side 32
faces the handle 10. A number of notches 34 are disposed in the
weight plate 14. The notches 34 are positioned on opposing sides of
the weight plate 14 and are adapted so that the weight plate 14 may
rest erectly on the plate rests 22. The notches 34 and plate rests
22 may be adapted to prevent the lower portion of the weight plate
14 from contacting base plate 20. This prevents the stack of weight
plates 14 from binding when removed from and placed into the base
18. In other exemplary embodiments, the notches 34 and plate rests
22 may be adapted to allow the lower portion of the weight plate 14
to contact the base plate 20. In still other exemplary embodiments,
the weight plates 14 may be adapted to rest directly on any surface
without the need for a base 18.
[0043] Weight plates 14 of the exemplary adjustable dumbbell 5 also
includes a vertical guide 38 vertically aligned in the weight plate
14 intersecting with a lateral channel 40 located in the weight
plate 14. The vertical guide 38 includes an open end 42 and a
terminal end 44. In some exemplary embodiments, the vertical guide
38 may terminate in the lateral channel 40 (as shown in FIG. 9). As
shown in FIGS. 3-4, the lateral channel 40 has a circular
configuration and has an interior diameter greater than the width
of the intersecting vertical guide 38. The lateral channel 40 is
also adapted to slidably receive the retention member 16 (shown in
FIG. 6), as described in more detail below. In some exemplary
embodiments, the lateral channel 40 is adapted to rotatably and
slidably receive a portion of the retention member 16. Although the
lateral channel 40 is shown in a circular configuration, it should
be understood by those skilled in the art that substantially any
shape may be used, including, but not limited to, rectangular and
triangular shapes.
[0044] The weight plate 14 may also include a stacking pin 46
extending from a lower portion of the second side 32 thereof. A
corresponding pin groove 48 may be disposed in the lower portion of
the first side 30 of the weight plate 14. The pin groove 48 is
adapted to receive the stacking pin 46 of adjacent weight plates 14
when in a stacked configuration. The interlocking of the stacking
pin 46 and the pin groove 48 prevents the weight plates 14 from
rotating relative to one another. This interlocking provides a more
stable exercise motion without the need for cumbersome stabilizing
features and aids in alignment of the lateral channels 40 of each
stacked weight plate 14. Although a pin groove 48 and a
corresponding stacking pin 46 are contemplated, it should be
understood by those skilled in the art that that a variety of
concave/convex complementary features may be used to interlock the
weight plates 14 and prevent the weight plates 14 from rotating
relative to one another.
[0045] A retention groove 36 is also disposed within the first side
30 of the weight plate 14. The retention groove 36 is adapted to
receive the retention bar 64 (shown in FIG. 6) portion of the
retention member 16, described in greater detail below. As shown in
FIG. 3, the retention groove 36 may extend from the lateral channel
40 to an outer edge of the weight plate 14.
[0046] The handle 10 of the exemplary adjustable dumbbell 5 is
depicted in FIG. 5. The handle 10 includes a first end 50 and a
second end 52, each end having a locking mechanism 12 affixed
thereto and extending radially and outwardly therefrom. The handle
10 has a first passage 54 and a second passage 56 disposed therein.
The first passage 54 extends laterally into the handle 10 from the
first end 50 and the second passage 56 extends laterally into the
handle 10 from the second end 52. The first passage 50 and the
second passage 54 are offset so as to not intersect with one
another inside the handle 10. The first and second passages 54 and
56 are adapted to slidably receive the rod 60 (shown in FIG. 6)
portion of the retention member 16, as described in more detail
below. In other exemplary embodiments, the first and second
passages 54 and 56 are adapted to slidably and rotatably receive
the rod 60 portion of the retention member 16.
[0047] The retention member 16 of the exemplary adjustable dumbbell
5 is depicted in FIG. 6. The retention member 16 includes a rod 60
having a series of holes 62 and a retention bar 64. The rod 60 has
a longitudinal axis and is adapted to be received by the lateral
channels 40 in the weight plates 14 and adapted to be slidably
received by the passages 54, 56 in the handle 10. The retention bar
64 extends substantially perpendicular from the longitudinal axis
of the rod 60. The distal end of the retention bar 64 may be
adapted to allow a user to easily manipulate the retention bar 64
and rod 60. The retention bar 64 may be further adapted to
facilitate passage through the vertical guide 38 in the weight
plates 14.
[0048] The series of holes 62 may be arranged in a straight line
running along the exterior of the rod 60. The holes 62 may traverse
the entire rod 60 or only a portion of the rod 60. The spacing
between the holes 62 corresponds to the distance between the
retention grooves 36 in the weight plates 14, when the weight
plates 14 are in a stacked configuration. The holes 62 are located
so that when the retention member 16 is rotated, engaging the
retention bar 64 with the retention groove 36 in a weight plate 14,
the holes 62 align with the pin 70 (shown in FIG. 7) in the locking
mechanism 12.
[0049] FIG. 6 also illustrates an exemplary embodiment where at
least one weight plate 14 may be attached to each locking
mechanisms 12. Although the use of mechanical fasteners 66 are
contemplated it should be understood by those skilled in the art
that other forms of attachment may be suitable, such as welds,
adhesives, etc. Attachment of a weight plate 14 to the locking
mechanism 12 helps to align the handle 10 with the stacked weight
plates 14 in the plate rests 22. In this embodiment, the vertical
guide 38 may be adapted to receive a portion of the pin lever 72
(shown in FIG. 7) and allow a user easy access to manipulate the
pin lever 72.
[0050] A locking mechanism 12 of the exemplary adjustable dumbbell
is depicted in FIG. 7. Locking mechanisms 12 may be attached to the
handle 10 at the first and second ends 50 and 52, and are adapted
to slidably receive the rod 60 when the locking mechanism 12 is in
an unlocked position. A rod 60 may pass through each locking
mechanism 12 and be inserted into each passage 54, 56 within the
handle 10. When in a locked position, the locking mechanisms 12
eliminate the rotational motion and longitudinal displacement of
the rod 60 disposed therein. To lock the rods 60 into place, the
locking mechanisms 12 may employ a pin 70 in communication with a
pin lever 72. The pin 70 may pass through the locking mechanism 12
and be inserted into a hole 62 on the rod 60 to prevent rod 60
movement (locked position). It should be understood by those
skilled in the art that while the use of a pin 70 is contemplated
other devices may be used. The pin lever 72 may be manipulated by a
user to engage the pin 70 with a desired hole 62 (locked position)
and again to disengage the pin 70 from a hole 62 to allow the rod
60 to move. The arrangement of the retention bar 64 and holes 62
are such that when the retention bar 64 is placed in a retention
groove 36, at least one hole 62 is aligned with the pin 70.
[0051] An additional safety feature may be provided by elongating
the pin lever 72 so that when the pin lever 72 is in the unlocked
position, the pin lever 72 interferes with the user's ability to
grip the handle 10. This interference prevents the user from
lifting the adjustable dumbbell 100 when the retention member 16 is
not locked, and thus preventing the weight plates 14 from falling
off the adjustable dumbbell and injuring the user.
[0052] An exemplary embodiment of an adjustable dumbbell 5 of the
present invention is basically constructed as described above.
Operation of the adjustable dumbbell is described below.
[0053] To select a desired amount of weight plates 14 for an
exercise, a user extends the rod 60 from the handle 10 through the
later channels 40 of the stacked weight plates 14 supported by the
plate rests 22 by manipulating the retention bar 64. Once rod 60
has been extended to the desired weight plate 14, the user rotates
the rod 60 by placing the retention bar 64 into the retention
groove 36. The rotation of the rod 60 aligns the holes 62 with the
pin 70 within the locking mechanism 12. The engagement between the
retention bar 64 and the retention groove 36 prevents the selected
weight plates 14 from sliding off the rod 60. A user may then
manipulate the pin lever 72 to engage the pin 70 with a hole 62 in
the rod 60, preventing longitudinal and rotational movement of the
rod 60 (locked position). This process is repeated for both sides
of the adjustable dumbbell 5. In this manner, the adjustable
dumbbell 5 allows the user to select the amount of weight on each
side independently. In addition, weight plates 14 may be added and
removed from the rod 60 without removing the rod 60 from the handle
10. The user may then lift the handle 10 and attached weight plates
14, while the unselected weight plates 14 remain in the base
18.
[0054] Another exemplary embodiment of an adjustable dumbbell
device 100 (adjustable dumbbell) of the present invention is
illustrated in FIG. 8 and in the component drawings of FIGS. 9-14.
As shown, the exemplary embodiment of the adjustable dumbbell 100
includes a handle 10 having opposing locking mechanisms 112
attached to the end portions thereof. A plurality of selectable
weight plates 114 positioned adjacent to the locking mechanisms
112. A retention member 116 is disposed within each end of the
handle 10 and extends from the handle 10 through the weight plates
14. A base 118 is provided and includes plate rests 22 arranged in
a first set 80 and a second set 82. The base further includes
supports 124 attached to the first and second sets 80, 82 of plate
rests 22 and a weight guide 126 affixed to the supports 124.
[0055] As shown in FIG. 8, the plate rests 22 extend downward and
are adapted to interface with a support surface, such as a floor,
shelf or rack. In this manner a base plate 20 as described above is
unnecessary; however, it should be understood to one skilled in the
art that base plate 20 may still be employed. The plate rests 22
are further adapted to support the weight plates 114. The plate
rests 22 are arranged to form a first set 80 and a second set 82. A
support 124 is attached to each set 80, 82 of plate rests 22. The
supports 124 are adapted to cradle the locking mechanisms 112 and
facilitate locking and unlocking of the locking mechanism 112, as
will be described in detail below. A weight guide 126 may be
affixed to and run between the supports 124. The distal ends of the
weight guide 126 may be turned up and adapted to guide the weight
plates 114 into the stacked configuration.
[0056] A weight plate 114 of an exemplary embodiment of the
adjustable dumbbell 100 is depicted in FIG. 9. The weight plate 114
includes a number of notches 34. The notches 34 are positioned on
opposing sides of the weight plate 14 and are adapted to engage the
plate rests 22. As described above, the notches 34 and plate rests
22 are adapted to prevent the lower portions of the weight plates
114 from contacting any surface, such as a support surface or base
plate 20. In other embodiments, the notches 34 and plate rests 22
may be adapted to allow the lower portions of the weight plates 114
to rest against a surface for further support.
[0057] Weight plates 114 of the exemplary adjustable dumbbell 100
also includes a vertical guide 138 intersecting with a lateral
channel 40 located in the weight plate 114. The vertical guide 138
extends from the outer portion of the weight plate 114 and
terminates in the lateral channel 40. As shown in FIG. 9, the
lateral channel 40 has a circular configuration and includes an
opening 142. The lateral channel 40 is adapted to slidably receive
the rod 160 of the retention member 116. The lateral channel 40 has
an interior width greater then the width of the opening 142, thus
keeping the rod 160 disposed within the lateral channel 40.
Although the lateral channel 40 is shown in a circular
configuration, it should be understood by those skilled in the art
that substantially any shape may be used, including, but not
limited to, rectangular and triangular shapes.
[0058] Retention tabs 136 are disposed in the lower portion of the
vertical guide 138, near the intersection of the vertical guide 138
and the lateral channel 40. The retention tabs 136 are adapted to
complementary engage the lower portion 172 of the retention pin 170
of the retention member 116, to prevent the selected weight plates
114 from sliding off the rod 160. In other exemplary embodiments,
the retention tabs 136 may be positioned at any location within the
vertical guide 138. In still other exemplary embodiments, multiple
retention tabs 136 may be placed at various locations within the
vertical guide 138
[0059] The handle 10 is described above in FIG. 5 and includes
offset first and second passages 54, 56 disposed therein. The first
and second passages 54, 56 are adapted to slidably receive the rod
160.
[0060] As shown in FIG. 8, the adjustable dumbbell 100 includes a
retention member 116. The retention members 116 are slidably
disposed within each of the handle's 10 passages 54, 56. The
retention member 116 is adapted to affix a selected number of
weight plates 114 to the handle 10 so that a user may adjust the
weight of the adjustable dumbbell 100. The retention member 116 is
comprised of several components depicted in more detail in FIGS.
10-12. The retention member 116 includes a rod 160; an attachment
member 164, and a retention pin 170. The rod 160 is adapted to be
slidably disposed within the passages 54, 56 of the handle 10 and
includes a series of depressions 162. The rod 160 is also adapted
to pass through the locking mechanisms 112 and be inserted into the
first and second passages 54, 56 within the handle 10. As the
passages 54, 56 are adapted to slidably receive the rod 160, the
passages 54, 56 may be contoured to the shape of the rod 160,
preventing rotation of the rod 160 within the handle 10.
[0061] In this embodiment, the rod 160 includes a lower portion 166
and an upper portion 168. The lower portion 166 is adapted to be
slidably received by the lateral channel 40 in the weight plates
114. The upper portion 168 of the rod 160 extends into the vertical
guide 138 through the opening 142; preventing rotation of the
weight plate 114 about the longitudinal axis of the rod 160. This
feature eliminates the need for the pin 46 and pin groove 48 to
prevent weight plate 114 rotation about the longitudinal axis of
the rod 160, as described in other exemplary embodiments shown in
FIG. 2-4. Although some embodiments may include both anti-rotation
features; it should be understood by those skilled in the art that
the rod 160 may take any shape preventing weight plate 114 rotation
about the longitudinal axis of the rod 160.
[0062] The attachment member 164 extends from the rod 160 and is
adapted to secure the retention pin 170 to the rod 160. In some
exemplary embodiments, the attachment member 164 extends
substantially perpendicular from the longitudinal axis of the rod
160. Although depicted in FIG. 10 as extending from the distal end
of the rod 160, the attachment member 164 may extend from any point
along the longitude of the rod 160. An exemplary embodiment of a
retention pin 170 used in the retention member 116 is depicted to
FIG. 12. The retention pin 170 includes a lower portion 172, this
lower portion 172 is adapted to receive the attachment member 164
and surround the upper portion 168 of the rod 160. A spring or
other resilient member (not shown in the Figures) may be interposed
between the attachment member 164 and the retention pin 170,
thereby spring loading the retention pin 170 and applying a
downward force to the retention pin 170. The retention pin 170 also
includes an aperture 174 or other similar component providing easy
manipulation by a user.
[0063] The retention pin 170 is adapted to nest in the vertical
guide 138. When the retention pin 170 is nested in the vertical
guide 138 the lower portion 172 of the retention pin 170 is in
complementary engagement with the retention tabs 136. This
engagement prevents the selected weight plates 114 from sliding off
the end of the rod 160. In other exemplary embodiments additional
retention tabs 136 may be added to the vertical guide 138.
[0064] The depressions 162 are arranged in a straight line running
the along the exterior of the rod 160 for engagement with the
spring load pin 190 (shown in FIG. 13) of the locking mechanism
112. The depressions 162 may run the entire length of the rod 160
or only a portion of the rod 160. The spacing between the
depressions 162 corresponds to the distance between the retention
tabs 136 in the weight plate 114, when the weight plates 114 are in
a stacked configuration.
[0065] A locking mechanism 112 and support 124 of the exemplary
adjustable dumbbell is depicted in FIGS. 13-14. The locking
mechanism 112 depicted in FIG. 13 is in the unlocked position
allowing the rod 160 to be moved longitudinally. The locking
mechanism 112 depicted in FIG. 14 is in the locked position
preventing longitudinal movement of the rod 160. As described
above, a locking mechanism 112 may be attached to each end of the
handle 10, and adapted to slidably receive the rod 160 when in an
unlocked position. In this embodiment the locking mechanism
includes a pin 190 extending transverse to the rod 160. The pin 190
traverses the locking mechanism 112 and is disposed horizontally
therein so as to engage a depression 162 on the rod 160 when in a
locked position. The pin 190 includes a complementary portion 192
allowing longitudinal movement of the rod 160 when in an unlocked
position. As shown in FIGS. 13 and 14 the complementary portion 192
of the pin 190 is an area of decreased diameter as compared to the
remainder of the pin 190. In some exemplary embodiments, the pin
190 may be spring loaded forcing the pin into the locked position.
The pin 190 has a length such that an end portion may extend beyond
the body of the locking mechanism 112 when in both the locked and
unlocked position.
[0066] The aforementioned support 124 includes a receptacle 200
disposed therein and adapted to receive and support the locking
mechanism 112. The support 124 further includes a locking channel
202 and an unlocking channel 204 disposed in the sides of the
receptacle 200. The locking channel 202 is adapted to force the pin
190 into a locked position as the locking mechanism 112 is removed
from the receptacle 200. The unlocking channel 204 is adapted to
force the pin 190 into an unlocked position when the locking
mechanism 112 is placed in the receptacle 200. To ensure correct
movement of the pin 190 into the locked position as the locking
mechanisms 112 are removed from the receptacles 200, the locking
mechanisms 112 may have substantially square cross-section having
rounded corners. This shape prevents rotation of the locking
mechanism 112 within the receptacles 200. By eliminating rotation
of the locking mechanism 112 relative to the receptacle 200, it
ensures engagement of the pin 190 with the locking channel 202
moving the pin 190 into the locked position. It should be
understood by those skilled in the art that although a locking
mechanism 112 with a substantially square cross-section is
contemplated, the locking mechanism 112 have any shape preventing
rotation of the locking mechanism 112 within the receptacle while
allowing easy ingress and egress.
[0067] The locking mechanism 112, receptacle 200, and retention
member 116 also provide an important safety feature to the
adjustable dumbbell 100. If a user fails to properly nest the
retention pin 170 within the vertical guide 138 so as to contact
the lower portion 172 of the retention pin 170 with the retention
tab 136, the pin 190 located within the locking mechanism 112 will
not align properly with the series of depressions 162 in the rod
160. When the pin 190 is not aligned with the depressions 162 the
pin 190 is prevented from moving into the locked position. When a
user attempts to remove the locking mechanism 112 from the
receptacle 200 when the pin 190 is prevented from moving into the
locked position, the locking channel 202 prevents the locking
mechanism from exiting the receptacle 200. In this manner, the
adjustable dumbbell 100 prevents usage when the retention member
116 is not properly placed and locked to eliminate the possibility
of the weight plate 114 falling from the retention member 116
potentially injuring the user.
[0068] An exemplary embodiment of an adjustable dumbbell 100 of the
present invention is basically constructed as described above.
Operation of the adjustable dumbbell is described below.
[0069] To select a desirable amount of weight plates 114 for an
exercise, a user extends the rod 160 from the handle 10 through the
lateral channels 140 of the weight plates 114 by manipulating the
retention pin 170. To extend the rod 160, the pin 170 is lifted so
as the clear the retention tabs 136. Once the desired number of
weight plates 114 has been selected the retention pin 170 is
lowered into the vertical guide 138 of the desired weight plate
114. The lower portion 172 of the retention pin 170 engages the
retention tab 136 preventing the selected weight plates 114 from
falling off the rod 160. Once the desired number of weight plates
114 has been selected on both sides of the adjustable dumbbell 100,
the user may lift the handle 10 and attached weight plates 114 from
the base 18. As the locking mechanisms 112 are removed from the
support 124, the pin 190 engages a depression 162 in rod 160
preventing longitudinal motion of the rod 160. After completion of
the exercise, the adjustable dumbbell 100 is lowered into the base
18 aligning the locking mechanisms 112 with the supports 124. As
the locking mechanisms 112 enter the support 124 the pin 190 is
forced into the unlocked position by the locking channel 204
allowing the rod 160 to move longitudinally.
[0070] Still another exemplary embodiment of an adjustable dumbbell
device 300 (adjustable dumbbell) according to the present invention
is illustrated in FIG. 15 and in the component drawings of FIGS.
16-22. As shown, the exemplary embodiment of the adjustable
dumbbell 300 includes a handle 10 having opposing locking
mechanisms 212 attached to the end portions thereof. A plurality of
selectable weight plates 214 positioned adjacent to the locking
mechanisms 212. A retention member 216 is disposed within each end
of the handle 10 and extends from the handle 10 through the weight
plates 214. A base 218 is provided and includes plate rests 222
used to support the weight plates 214 not in use. Located on the
plate rests 222 are a plurality of protrusions 224. The protrusions
224 are located along each side of the plate rests 222 and are
adapted to complementarily engage grooves 220 (shown in FIG. 16)
found on the weight plates 214. The protrusions 224 may be molded
into the plate rests 222 in unitary design or affixed to the plate
rests 222. The protrusions 224 maintain proper weight plate 214
spacing while in the base 218. In addition, the protrusions 224 may
prevent binding of the weight plates 214 during removal and
insertion from the base 218.
[0071] As shown in FIG. 15, the base 218 is adapted to cradle the
locking mechanism 212. The base 218 also included tray tabs 226.
The tab stops 226 serve to prevent the adjustable dumbbell 300 from
being removed from the base 218 while in the unlocked position.
This feature provides safety to the user during use of the
adjustable dumbbell 300.
[0072] As illustrated in FIGS. 16 and 17, other exemplary weight
plates 214 may be used with the adjustable dumbbells disclosed
herein. The weight plate 214 depicted in FIGS. 16 and 17 has a two
piece design. A first plate 214a is fastened to a second plate
214b. The plates 214a, 214b may be fastened to one another by
welding, adhesives, mechanical fasteners, or other means sufficient
to withstand the strains associated with use of the adjustable
dumbbells. The use of two plates 214a, 214b decreases the cost of
production and eliminates the need for expensive milling required
by some other exemplary weight plates 14, 114. The weight plate 214
includes a number of notches 34. As illustrated the notches 34 are
positioned on opposing sides of the weight plate 214 and are found
in both the first and second plates 214, 214a. As with other
exemplary embodiments the notches 34 are adapted to engage the
plate rests 22.
[0073] In addition, the weight plate 214 has grooves 220 formed
into at least one plate 214a, 214b. Although the grooves 220 are
shown in the first plate 214a, it should be understood that the
groove 220 may also be located in the second plate 214b. The
grooves 220 are positioned on opposing sides of the weight plate
214 and are adapted to engage the protrusions 224 (as shown in FIG.
15). The grooves 220 are designed to interact with the protrusions
224 in order to properly align the weight plates 214 when not in
use. In addition, the use of the groove 220 and protrusions 224 may
prevent binding of the weight plates 214 when removed and returned
to the plate rests 222.
[0074] The weight plates 214 also include a vertical guide 138 that
intersects with a lateral channel 40 located near the center of the
weight plate 214. The vertical guide 138 extends from the outer
portion of the weight plate 214 and terminates on the lateral
channel 40. As shown in FIG. 16, 17, the lateral channel 40 has a
circular configuration and includes an opening 142. The lateral
channel 40 may be adapted to slidably receive an exemplary rod 160,
260 (as shown in FIG. 15). The lateral channel 40 has an interior
width greater than the width of the opening 142, thus keeping the
rod 260, disposed within the lateral channel 40. Although the
lateral channel 40 is shown in a circular configuration, it should
be understood by those skilled in the art that substantially any
shape may be used, including, but not limited to, rectangular and
triangular shapes.
[0075] Retention tabs 236 are disposed in the lower portion of the
vertical guide 138, near the intersection of the vertical guide 138
and the lateral channel 40. The retention tabs 236 are adapted to
complementarily engage the lower portion 272 of the retention pin
270 (shown in FIG. 15) of the retention member 216, to prevent the
selected weight plates 214 from sliding off the rod 260. As
discussed herein, the retention tabs 236 may be positioned at any
location within the vertical guide 138.
[0076] In the weight plate 214 embodiment presented in FIGS. 16, 17
the weight plates 214 also include plate tabs 240. As shown, the
plate tabs 240 extend from the lower portion of the face of the
plate weight 214. Although shown extending from the second plate
214b, one of skill in the art should understand that the plate tabs
240 may extend from either the first or second plates 214a, 214b.
The plate tabs 240 are created during the stamping process and are
adapted to nest inside the plate apertures 245 when the weight
plates 214 are in a stacked configuration. The plate apertures 245
are located on the side of the weight plates 214 opposite the plate
tabs 240. When the weight plates 214 are stacked the plate tabs 240
rest inside the plate apertures 245 preventing the weight plates
214 from spinning relative one to another. This prevents the weight
plates 214 from becoming unstable during use.
[0077] The handle 10 is described above in discussions related to
FIG. 5 and includes offset first and second passages 54, 56
disposed therein. The first and second passages 54, 56 are adapted
to slidably receive the rod 260.
[0078] As illustrated in FIG. 15, the adjustable dumbbell 300
includes a retention member 216. The retention members 216 are
slidably disposed within each of the handle's 10 passages 54, 56.
The retention member 216 is adapted to affix a selected number of
weight plates 214 to the handle 10 so that a user may adjust the
weight of the adjustable dumbbell 300. The retention member 216
includes several components depicted in more detail in FIGS.
18A-19B. The retention member 216 includes a rod 260; an attachment
member 264 (shown in FIG. 18A-19B); and a retention pin 270.
[0079] The rod 260 is adapted to be slidably disposed within the
passages 54, 56 of the handle 10 and includes a series of
depressions 262. The rod 260 is also adapted to pass through the
locking mechanisms 212 and be inserted into the first and second
passages 54, 56 within the handle 10. As the passages 54, 56 are
adapted to slidably receive the rod 260, the passages 54, 56 may be
contoured to the shape of the rod 260, preventing rotation of the
rod 260 within the handle 10.
[0080] In the embodiments shown in FIGS. 20A and 20B, the rod 260
has a body having a longitudinal axis. The rod 260 is adapted to be
slidably received by the lateral channel 40 in weight plates 214.
Although shown having a substantially circular cross-section, it
should be understood that the rod 260 may have a variety of
shapes.
[0081] The attachment member 264 is attached to the end of the rod
260. As illustrated in FIGS. 20A and 20B, the attachment member 264
may be attached to the rod 264 by a mechanical fastener, it should
also be understood that other means of affixing he attachment
member 264 to the rod 260 may be used, such as welds or adhesives.
Although shown with optional attachment member guides on the end of
the rod 260, it should be understood that these elements are
optional and the attachment member 264 may be affixed directly to
the rod 260 without them. In still other exemplary embodiments, the
attachment member 264 and the rod 260 may be a single unitary
piece. In this embodiment, the attachment member has a slot
266.
[0082] An exemplary retention pin 270 used in the retention member
216 is depicted in FIGS. 18A-19B. The retention pin 270 includes a
lower portion 272; this lower portion 272 is adapted to receive the
attachment member 264. A spring or other resilient member (not
shown in the Figures) may be interposed between the attachment
member 264 and the retention pin 270, thereby spring loading the
retention pin 270 and applying a downward force to the retention
pin 270.
[0083] The retention pin 270 is adapted to nest in the vertical
guide 138. When the retention pin 270 is nested in the vertical
guide 138 the lower portion 272 of the retention pin 270 is in
complementary engagement with the retention tabs 236. This
engagement prevents the selected weights plates 214 from sliding
off the end of the rod 260. In other exemplary embodiments,
additional retention tabs 236 may be added to the vertical guide
138.
[0084] In order to prevent unintentional movement of the retention
pin 270, the retention pin 270 may include a locking tab 268. The
locking tab 268 has a locked position as shown in FIGS. 18A, 18B
and an unlocked position as shown in FIGS. 19A, 19B. In the locked
position, the lower portion of the retention tab 268 inserts into
the slot 266 of the attachment member 270, preventing the retention
pin 270 from moving relative to the attachment member 264. To
unlock the locking tab 268, a user depresses the upper portion of
the locking tab 268 as shown in FIGS. 19A, 19B. When the locking
tab 268 is not resting in the slot 266 the retention tab may move
relative to the attachment member 264. To increase safety the
locking tab 268 may have an associated resilient member biasing the
locking tab 268 toward the locked position. In addition, the word
"Locked" may be written on the exposed portion 270a of the
retention tab 270, as the exposed portion is only visible when the
locking tab 268 is in the locked position.
[0085] The depressions 162 are arranged in a straight line running
along the exterior of the rod 260 for engagement with the pin 290
(shown in FIGS. 21, 22) of the locking mechanism 212. The
depressions 162 may run the entire length of the rod 260 or only a
pre-determined portion of the rod 260. The spacing between the
depressions 162 corresponds to the distance between the retention
tabs 236 in the weight plates 214 when the weight plates 214 are in
a stacked configuration.
[0086] The locking mechanism 212 of the exemplary adjustable
dumbbell 300 is depicted in FIGS. 21, 22. The locking mechanism 212
depicted in FIG. 21 is in the locked position preventing
longitudinal movement of the rod 260. The locking mechanism 212
depicted in FIG. 22 is in the unlocked position allowing the rod
260 to move longitudinally. As described above, the locking
mechanism 212 may be attached to each end of the handle 10, and
adapted to slidably receive the rod 260 when in the unlocked
position. In this embodiment, the locking mechanism 212 includes a
pin 290 extending transverse to the rod 260. The pin 290 traverses
the locking mechanism 212 and is disposed horizontally therein so
as to engage a depression 162 on the rod 260 when in the locked
position. Although shown in a horizontal configuration it should be
understood that in other exemplary embodiments the pin 290 need not
be horizontal, but rather only aligned with the depressions 162 in
the rod 260.
[0087] The pin 290 includes a complementary portion 292 allowing
longitudinal movement of the rod 260 when in the unlocked position.
As illustrated, the complementary portion 292 of the pin 290 is an
area of decreased diameter as compared to the remainder of the pin
290. In some exemplary embodiments, the pin 290 may be spring
loaded forcing the pin 290 into the locked position. The pin 290
has a length such that an end portion may extend beyond the body of
the locking mechanism 212 when in both the locked and unlocked
position.
[0088] As an additional safety feature, the pin 290 may have an
extended length and interact with the tray tabs 226. As shown in
FIG. 22, when the locking mechanism 212 is in the unlocked
position, the pin 290 will rest beneath the tray tabs 226. This
positioning prevents a user from lifting the adjustable dumbbell
300 from the base 218 in the unlocked position. However, upon
placing the pin 290 in the locked position, as shown is FIG. 21,
the pin 290 is free to pass the tray tab 226 allowing a user to
lift the adjustable dumbbell 300 from the base 218.
[0089] An exemplary embodiment of an adjustable dumbbell 300
according to the inventive concept is constructed as described
above. Operation of the adjustable dumbbell is described below.
[0090] To select a desirable amount of weight plates 214 for an
exercise, a user extends the rod 260 from the handle 10 through the
lateral channels 40 of the weight plates 214. To extend the rod
260, the locking tab 268 is moved into the unlocked position to
allow the retention pin 270 to be lifted upward. The retention pin
270 is then lifted so as to clear the retention tabs 236. Once the
desired number of weight plates 214 has been selected the retention
pin 270 is lowered into the vertical guide 138 of the desired
weight plate 214. The lower portion 272 of the retention pin 270
engages the retention tabs 236 preventing the selected weight
plates 214 falling of the rod 260. Once the retention pin 270 is
seated properly in the vertical guide 138, the user places the
locking tab 268 into the locked position, preventing unwanted
upward movement of the retention pin 270. The user then places the
pin 290 of the locking mechanism 212 into the locked position. When
in the locked position, the pin 290 engages the depressions 162 in
the rod 260, preventing longitudinal movement of the rod 260. Once
these steps have been repeated for both sides of the adjustable
dumbbell 300 the user may lift the adjustable dumbbell 300 from the
base 218. The removal is permitted after placing the pin 290 in the
locked position as it will clear the tray tabs 226 during removal.
After completion of the exercise the adjustable dumbbell 300 is
lowered back into the base 218.
[0091] While certain embodiments of the present invention are
described in detail above, the scope of the invention is not to be
considered limited by such disclosure, and modifications are
possible without departing from the spirit of the invention as
evidenced by the following claims:
* * * * *