Adjustable Dumbbell

Abstract

Improvements in an adjustable dumbbell to adjust the weight by insertion and removal of weights to one or both sides of the dumbbell. The weights are loaded into a carousel around the outside of the dumbbell handgrip. The weights can be place in opposing axial arrangement or can be placed in an uneven loading. A locking mechanism allows for a single rotation of the locking mechanism to secure and unlock all weights with a single rotation. The locking mechanism prevents the weights from falling or dislodging from the dumbbell axle when the dumbbell is being used. A rotating central axil allows for the heavy side of the dumbbell to rotate to a lower position. The rotating axil creates an eccentric weight placement for dynamic inertia exercises where a user can rotate or spin the eccentric weight around the handle of the dumbbell.

Description

PRIOR ART

U.S. patent Ser. No. 11/065,499 issued on Jul. 20, 2021, to Paul Chen and is titled Adjustable Dumbbell. This patent discloses an adjustable dumbbell assembly includes a dumbbell mechanism having two or more weight members engaged in a receptacle, and a handle bar engaged between the weight members, two catches slidably engaged in the handle bar and extendible out and engageable with the weight members for detachably attaching the weight members to the handle bar, two followers slidably engaged in the receptacle and each having a protrusion for engaging with the catches and for moving the catches to engage with the weight members. The weights in the patent stack on the outside of the dumbbell as opposed to around each side of the dumbbell.

U.S. Published application number 20170274240 was published on Sep. 28, 2017, to Alex Pong and is titled Easy to assemble/disassemble adjustable monetary coin-weighted dumbbell. This publication discloses an easily assembled and disassembled exercise dumbbell that derives the majority of its adjustable weight from the addition of monetary coins. The number of coins used determines the weight of the dumbbell, thereby making possible very small incremental increases in the dumbbell's effective total weight. The weight of the dumbbell's handle assembly can be multiplied up to nine times in its heaviest dumbbell configuration. While this publication is for an adjustable dumbbell it requires a user to insert coins of unknown weight.

U.S. Pat. No. 6,837,833 issued on Jan. 4, 2005, to Miles Elledge and is titled Specialty Weight Training Apparatus and Method. This patent discloses a dumbbell type apparatus comprises a hand gripping surface mounted on an axle and engaging a pair of spaced apart circular wheel-weights rotationally engaged with the axle. The weights provide peripheral outfacing surfaces for rolling the apparatus on a floor surface. Each of the weights has a non-concentrically placed center of mass, whereby with the hand gripping surface held in one hand, the apparatus may be rotated causing the wheel-weights to spin and to thereby exercise the arm holding the apparatus. This patent requires threading the weights into the end of the axle.

U.S. Pat. No. 8,900,104 issued on Dec. 2, 2014, to Andy Shozda and is titled Bullet-pocket Dumbbell Exercise Apparatus. This patent discloses an improved dumbbell exercise apparatus includes at least a pair of novel bullet-pocket configured weight plate members to be mounted in spaced end-wise relationship on a dumbbell bar, wherein each weight plate member is configured to include at least a pair of cylindrical pocket-like openings extending axially through the thickness dimension of the weight plates, respectively, in parallel and axially offset extension to each other is selectively axially inserted into an aligned cylindrical pocket opening, in order to add or adjust weight to the weight plate. While this patent discloses a dumbbell with bullet weights, the retention mechanism requires rotating the weight within the cylindrical opening.

What is needed is an adjustable dumbbell where weights are loaded around the sides of the dumbbell and retained with a single retention mechanism. The adjustable dumbbell in this document provides the solution.

BACKGROUND OF THE INVENTION

Adjustable dumbbells allow a user to quickly change the weight on a dumbbell without requiring the user to own a large number of dumbbells. Most adjustable dumbbells use a stack of weights that extend out the sides of the dumbbell. The weights are sequentially stacked on the sides until a desired amount of weight has been added. Some more modern adjustable dumbbells use a quick engaging and locking system that allows for a quick change of the weight.

SUMMARY OF THE INVENTION

It is an object of the adjustable dumbbell to allow for the weight of the dumbbell to be adjusted by insertion and removal of weights to one or both sides of the dumbbell. The weights are loaded into a carousel around the outside of the dumbbell handgrip. The weights can be place in opposing axial arrangement or can be placed in an uneven loading. The individual weights can range from ½ pound to 2 or more pounds. While a minimum of one opening in the carousel can be used in a preferred embodiment would be 6, 8, or more openings to accept weight.

It is an object of the adjustable dumbbell to have a locking mechanism on the outside ends of the dumbbell. The locking mechanism allows for a single rotation of the locking mechanism to secure and unlock all weights with a single rotation. The locking mechanism prevents the weights from falling or dislodging from the dumbbell axle when the dumbbell is being used. The maximum total wight is based upon the number of cavities on the outside of the dumbbell.

It is another object of the adjustable dumbbell to use a central axial bearing on the handle. The rotating central axil allows for the heavy side of the dumbbell to rotate to a lower position. This ensures that the handle only exerts normal load from the weights. If the weight does not rotate the rotational axis of the load can change as the dumbbell is lifted in an arm curl exercise.

It is another object of the adjustable dumbbell to have a form factor that is smaller on overall length that adjustable dumbbells that stack weights of the sides of the dumbbell. Because the weights are placed in a radial relationship around the carousal the length of the adjustable dumbbell is nor changed by the addition or removal of weights. The weights are further nested into the carousal so the outside diameter of the dumbbell may also be minimally or not affected by addition or removal of weights.

It is still another object of the adjustable dumbbell to create an eccentric weight placement for dynamic inertia exercises where a user can rotate or spin the eccentric weight around the handle of the dumbbell. The imbalanced weight can be easily increased and decreased to change the intensity of the exercise.

Various objects, features, aspects, and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments of the invention, along with the accompanying drawings in which like numerals represent like components.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 shows a perspective view of an adjustable dumbbell.

FIG. 2 shows an end view of the adjustable dumbbell, the opposing end view being essentially a mirror image.

FIG. 3 is a cross-sectional view taken from 3-3 in FIG. 2.

FIG. 4 is an inside perspective view of one side of the adjustable dumbbell.

FIG. 5 shows a perspective view of the outside of one side of the adjustable dumbbell.

FIG. 6 is a perspective view of a slug weight, the locking plunger cog and the locking knob.

FIG. 7 is the adjustable dumbbell in use with some slug weights installed to create an eccentric or imbalance.

FIG. 8 shows a perspective view of another embodiment of the adjustable dumbbell.

FIG. 9 shows an end view of the adjustable dumbbell from FIG. 8, the opposing end view being essentially a mirror image.

FIG. 10 is a cross-sectional view taken from 10-10 in FIG. 9.

FIG. 11 is an inside perspective view of one side of the upper carousel.

FIG. 12 shows a perspective view of the cog locking mechanism.

FIG. 13 is a perspective view of a slug weight holder.

FIG. 14 is an underside perspective view of a slug weight holder from FIG. 13.

FIG. 15 is a perspective view of a kettle bag using the weights.

FIG. 16 is a view inside the kettle bag.

FIG. 17 is an exploded view of the kettle bag and weights.

FIG. 18 is a perspective view of weighted hose.

FIG. 19 is a perspective view of the weighted hose showing internal construction.

DETAILED DESCRIPTION OF THE INVENTION

It will be readily understood that the components of the present invention, as generally described and illustrated in the drawings herein, could be arranged and designed in a wide variety of different configurations. Thus, the following more detailed description of the embodiments of the system and method of the present invention, as represented in the drawings, is not intended to limit the scope of the invention but is merely representative of various embodiments of the invention. The illustrated embodiments of the invention will be best understood by reference to the drawings, wherein like parts are designated by like numerals throughout.

While this technology is susceptible of embodiment in many different forms, there is shown in the drawings and will herein be described in detail several specific embodiments with the understanding that the present disclosure is to be considered as an exemplification of the principles of the technology and is not intended to limit the technology to the embodiments illustrated. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the technology. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It will be further understood that the terms “comprises,” “comprising,” “includes,” and/or “including,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that like or analogous elements and/or components, referred to herein, may be identified throughout the drawings with like reference characters.

Item Numbers and Description
20 adjustable dumbbell    21 slug weight(s)
22 upper slug             23 lower slug
24 recess                 25 bullet weight
40 handle                 41 bearing
42 handle shaft           43 lock
44 lock recess            60 carousal
61 pockets                62 cushion
63 recess                 64 boss
65 lower carousal         66 upper carousel
67 upper carousel stop    68 spring extension
69 slot                   70 button
71 movement               72 translation cog
73 ball                   74 spring
75 outer diameter         76 reduced diameter
77 bolt                   78 cylindrical boss
79 rotation limiter       80 locking knob
81 knob bolt              82 bearing plug
83 spring                 84 nut
85 bearing                86 plunger cog
87 plunger arm            88 follower
89 curved slot            90 insert
91 grip recess            92 insert
93 spread                 94 push
95 rotate                 96 out
96 move                   97 eccentric motion
98 rotation               99 slide
100 holder                101 inner wall
102 outer finger          103 radius
104 flex                  105 gap
108 ribs                  109 holes
200 kettle bag            201 cylindrical bucket
202 handle                203 top cover
204 zipper                205 flexible bands
206 horizontal cushion(s) 207 elastomeric frame
208 pocket(s)             300 weighted hose
301 tube bag              302 zipper
303 slider                304 flexible band(s)
305 flexible band(s)

FIG. 1 shows a perspective view of an adjustable dumbbell 20. This figure shows a preferred embodiment with identically sized cylindrical slug weights 21 inserted into multiple pockets 61 in each side of the carousal 60. A rotatable handle 40 connects carousals 60 on opposite sides of the handle 40. The weight (or resistance) is adjusted by varying the number of slug weights 21 used. The slug weights 21 are prevented from sliding out of the pockets 61 in the carousal 60 by a locking knob 80 that is turned to lock the slug weight(s) 21 in the carousel 60 or opened to allow for removal of one or more of the slug weights 21. Turning the locking knob 80 aligns cutouts with one or more slug weights 21 for removal. The locking mechanism is shown and described in other figures herein.

FIG. 2 shows an end view of the adjustable weight 20, the opposing end view being essentially a mirror image and FIG. 3 is a cross-sectional view taken from 3-3 in FIG. 2. The dumbbell 20 is essentially construct from two identical halves joined by a handle 40. In the preferred embodiment the handle 40 has a curved radius that is narrower on the middle portion of the handle 40. Each end of the handle 40 has a bearing 41 that allows the end carousel(s) 60 to spin or turn independently of the handle 40. In the lower end of FIG. 3 the lower portion of the handle 40 shows a lock 43 or crown shaped ring that is slid 99 into a lock recess to stop rotation or spinning of a carousel 60 ends relative to the handle 40.

The carousal 60 connects to the handle shaft 42 and the handle 40 through the bearing 41. None or a plurality of slug weights 21 can be placed in the pocket(s) 61 of the carousel 60. In the embodiment shown there are six weights 21 in the carousel 60. While this embodiment shows that the carousel 60 can retain up to six weights, the carousel 60 can be designed to hold as few as two weights 21 to more than six weights 21. In the preferred embodiment, the weights 21 are about 2 pounds or 1 Kg each, but the weights 21 can be greater or lesser than 2 pounds or 1 Kg depending upon the design requirements or the needs of the consumer. The weights can range from 0.5 Kg to 2 Kg each. It is also contemplated that the weights 21 can be different weights but have essentially the same geometry with a lower slug 23 and upper slug 22 connected through a recess 24. The recess 24 is engaged with a plunger cog 86 that is controlled by the locking knob 80 to retain and release one or a plurality of weights 21.

The locking knob 80 is held by a knob bolt 81 that passes through the locking knob 80, a bearing 85, a spring 83 and is threaded into a nut 84. The spring 83 provides tension to the weight retention mechanism. A bearing plug 82 has pins that fit within followers that move individual plunger cog(s) 86 into an out of the recess 24 in each weight 21. Another figure in this document provides greater clarity for the operation and rotation of the locking knob 80 to extend and retract the plunger cog(s) 86 in unison.

FIG. 4 is an inside perspective view of one side of the adjustable dumbbell 20 and FIG. 5 shows a perspective view of the outside of one side of the adjustable dumbbell 20. The weights 21 have been placed in different positions to show features with the carousel 60. With the outer handle removed, in FIG. 4, a portion of the handle shaft 42 and the bearing 41. The outer race of the bearing is fixed to the outer handle (not shown in this figure), and the inner race of the bearing is secured to the handle shaft 42 and carousel 60.

In these figures the weights are shown with the upper slug 22, lower slug 23 and the recess 24. While a particular shape of the weight is shown with a flat end on the upper slug 22 portion and a rounded nose on the lower slug 23 portion, as long as the weight has a cylindrical recess 24 the weight can take nearly any shape. The weight can be fabricated from a solid weighted metal a homogeneous weighted elastomeric or with a weight molder or encapsulated in within a shell. In this embodiment the rounded lower slug 23 portion nests in a complementary shaped rounded pocket 61 in the carousel 60.

The locking knob 80 is shown recessed within the weights. A portion of the plunger cog 86 is shown extending from under the knob 80 and aligned to enter the recess 24 of the weight. As the locking knob 80 is turned, each plunger cog 86 is moved from under the locking knob 80 and into (or out of) the recess 24 in their respective weight. In the preferred embodiment the locking knob 80 controls only its associated carousel 60.

FIG. 6 is a perspective view of a slug weight 21, the locking plunger cog 86 and the locking knob 80 with the carousal removed. The slug weight 21 is shown with the upper slug 22 and lower slug 23 separated by recess 24. Some of the plunger cogs 86 have been removed to show the curved slot 89 where a follower 88 on the bottom of the plunger arm 87. The locking knob 80 has a plurality of curved slots 89 that correspond to the number of cavities in the carousal for the weights 21.

The locking knob 80 has a number of grip recesses 91 that provides easier grip and rotation of the locking knob 80. A central cylindrical boss 78 extends from the underside of the locking knob 80 and has a central hole for the knob bolt (not shown in this figure) to pass therethrough. On one side of the central cylindrical boss 78 is a rotation limiter 79 post that limits rotation of the locking knob.

To operate the locking mechanism for the weights 21 the locking knob 80 is rotated 95. The rotation moves the follower 88 on the plunger cog 86 to move in the curved slot 89 in the knob 80. This will then move 96 the plunger cog 86 into or out of the recess, depending upon the direction of rotation 95 of the locking knob 80. Rotation of the locking knob 80 moves each of the plurality of plunger cogs 86 radially outward or radially inward. The amount of rotation 95 is limited by the arc length of the curved slot 89 as well as by travel of the cylindrical boss 79 in a travel limiter (not shown).

FIG. 7 is the adjustable dumbbell 20 in use with some slug weights 21 installed to create an eccentric or imbalance. In this figure four slug weights 21 are shown installed with two weights in each carousal 60 side. As the adjustable dumbbell 20 is lifted in an exercise such as a curl, the bearings in the handle 40 allow the carousals 60 to rotate 98 as gravity forces the weights 21 to remain at the lowest side of the adjustable dumbbell 20. This also allows a user to exercise with an eccentric motion 97 where the user can grip the handle 40 and exert rotational 98 motion to the eccentric imbalance of the carousals 60. The rotational 98 motion to a carousal with a radially imbalanced eccentric number of weights enables eccentric motion 97 or dynamic inertia exercise by imparting centripetal motion or forces to the handle 40.

FIG. 8 shows a perspective view of another embodiment of the adjustable dumbbell 20. This figure shows another preferred embodiment with identically sized cylindrical slug weights 25 inserted into multiple pockets 61 in each side of the lower carousal 65. A rotatable handle 40 connects the carousals on opposite sides of the handle 40. A cushion 62 extends around each carousal. The weight (or resistance) is adjusted by varying the number of slug or bullet weights 25. The weights 25 are prevented from dislodging out of the pockets 61 in the upper carousal 66 and lower carousal 65 by a button 70 that is depressed to unlock the weight(s) 25 from the pockets 61 and a tab that in the lower carousal 65 that extending into a recess 63 in each weight 25. The locking mechanism is shown and described in other figures herein.

FIG. 9 shows an end view of the adjustable dumbbell from FIG. 8, the opposing end view being essentially a mirror image, FIG. 10 is a cross-sectional view taken from 10-10 in FIG. 9.

The dumbbell is essentially construct from two identical halves joined by a handle 40. In this preferred embodiment the handle 40 has is cylindrical. Each end of the handle 40 has a bearing 41 that allows the end carousel(s) to spin or turn separately and independently of the handle 40. In the lower end of FIG. 10 the lower portion of the handle 40 shows a lock 43 or that is slid 99 into a lock recess 44 to stop rotation or spinning of each carousel end relative to the handle 40. An elastomeric bumper 62 extends around each of the lower carousel(s) 65. Each weight 25 has a rounded end of the lower slug 23 and a flat end at the upper slug 22 end that are separated by a recess 24. The carousels are secured to the handle shaft 42 with a fastener or bolt 77 through a bearing plug 82.

The carousal 60 connects to the handle shaft 42 and the handle 40 through the bearing 41. None or a plurality of weights 25 can be placed in the pocket(s) 61 of the lower carousel 65. In the cross section there are weights 25 in the lower side of the figure and the pockets 61 in the upper portion of the cross-section are empty. While this embodiment shows that the carousel can retain up to six weights, the carousel can be designed to hold as few as two weights 25 to more than six weights 25. In the preferred embodiment, the weights 25 are about 2 pounds or 1 Kg each, but the weights 25 can be greater or lesser than 2 pounds or 1 Kg depending upon the design requirements or the needs of the consumer. The weights can range from 0.5 Kg to 2 Kg each. It is also contemplated that the weights 25 can be different weights but have essentially the same geometry with a recess 63 that is configured to engage in the boss 64 and the weights 24 have a recess 24 that extends at least partially around the weight 25. The recess 24 is engaged with a plunger cog 86 that is controlled by the button 70 to retain and release one or a plurality of weights 25.

The upper carousal 66 retains the button 70 and cog extending mechanism. The button 70 is held in an extended position with a spring 83. As the button 94 is pushed 94 a ball 73 is guided into a smaller diameter of the button 70 and a spring 74 retracts the plunger cog 86 into the lower carousel 65 to release the weight(s) 25 on one side of the adjustable dumbbell 20. Other figure in this document provides greater clarity for the operation of the button to release the weights 25.

FIG. 11 is an inside perspective view of one side of the upper carousel 66 and FIG. 12 shows a perspective view of the plunge cog 86 locking mechanism. In these figures, only one side of the dumbbell is shown, and a large number of components have been removed to provide a clearer image of the operation of the button 70 to secure and release the weight(s) 25 in the upper carousel 66. A spring 74 is fitted in a slot 68 between a translation cog 72 and an upper carousel stop 67 in a slot 69 to bias, track and guide the spring extension 68 of the translation cog 72 in a retracted position. The sides of the translation cog 72 are further guided by the slot created in the openings in upper carousel 66 as the translation cog 72 moves 96.

A spring 83 biases the button 70 in an extended position where the balls 73 press against the larger outer diameter 75 of the button 70. The large outer diameter 75 of the button 70 overcomes the spring 74 forces to hold the translation cog(s) 72 in an extended position where the plunger cog 86 extends into the recess 24 of each weight 25 to prevent the weigh 25 from dislodging when using the dumbbell.

When the button 70 is pushed 94 in, the spring 74 pushes each ball 73 to follow into the reduced diameter 76 of the button for movement 71 of the plunger cog 86 to move 96. This releases the plunger cog 86 from the recess 24 of the weight 25 thereby allowing the weight 25 to be removed, or alternatively allows for a weight 25 to be inserted into the carousel of the dumbbell.

FIG. 13 is a perspective view of a slug weight 25 holder 100 and FIG. 14 is an underside perspective view of a slug weight 25 holder 100 from FIG. 13. The holder 100 allows for storage or transportation of one to six weights 25. While the holder 100 is shown and described for holding six weights 25, it could be designed to hold as few as two weights 25 to more than 6 weights 25. The holder 100 is essentially a formed or molded shape with outer fingers 102 having an inner wall 101 at a radius 103 that corresponds to the inside diameter of the recess 24 of the weight 25. When a weight 25 is inserted between the fingers 102 the fingers 102 will flex 104 to allow the weight 25 to be inserted into the holder 100. The gap 105 is sized to allow the fingers to spread 93 without contacting an adjacent finger. While the weight 25 is shown with the recess 63 on one particular side of the holder 100, the weight 25 can be inserted in either orientation. One side of the holder 100 is shown with ribs 108. Finger holes 109 allow the holder 100 to be held for transportation.

FIG. 15 is a perspective view of a kettle bag 200 using the weights 25, FIG. 16 is a view inside the kettle bag 200 and FIG. 17 is an exploded view of the kettle bag 200 and weight(s) 25. The kettle bag 200 allows a user to install as many weights 25 as desired to perform exercises that can be accomplished with a kettle bag having a fixed weight. These exercises can include, but not be limited to, deadlift, swing, clean & press, squats, row, lunge, walk and snatch.

The weights 25 are shown retained in two levels with horizontal cushion 206 spacers that prevent impact between weights and from surfaces outside of the kettle bag 200. The kettle bag 200 has an outer shell with a handle 202. The outer cylindrical bucket 201 shell has a zipper 204 top where weights 25 can be inserted and removed. While a zipper is shown other forms of closing the lid 203 are contemplated including, but not limited to, snaps, buckle and hook-and-loop fasteners.

In FIG. 16 the weights 25 are retained in position with flexible bands 205. Up to 5 weights 25 are retained in the flexible bands 205 and a sixth weight 25 is retained within the center of the 5 encircled and retained weight 25. In FIG. 17 the weights 25 are secured in an elastomeric frame 207 where the weights 25 are surrounded inserted 92 and secured in pockets 208. The two layers of elastomeric frames 207 and horizontal cushions 206 are inserted 90 into the cylindrical bucker 201.

FIG. 18 is a perspective view of weighted hose 300 and FIG. 19 is a perspective view of the weighted hose 300 showing internal construction. The weighted hose uses none, one or more of the weights 25 that are secured within the hose body or tube bag 301. A zipper 302 extends along the length of the tube bag 301. A slider 303 allows the zipper 302 to be opened or closed. While a zipper 302 is shown other forms of closing the elongated bag 301 are contemplated including, but not limited to, snaps, buckle and hook-and-loop fasteners. Because the bag is flexible, (some) weights 25 can be placed at one or both ends and the user can “crush” the tube for gripping or wrapping the center of the tube over a portion of the user's body or neck.

The opened weighted hose 300 in FIG. 19 shows weights 25 secured with flexible bands 304 and some empty flexible bands 305. The bands engage into some, or all, of the recess 24 of each weight to reduce shifting of the weights and contact between adjacent weights 25. A user can install or remove weights 25 depending upon the exercise or the exercise intensity. Exercised can include, but not be limited to lift, swing, drag, toss, drop, heave and squats.

Thus, specific embodiments of an adjustable dumbbell and use of the weights have been disclosed. It should be apparent, however, to those skilled in the art that many more modifications besides those described are possible without departing from the inventive concepts herein. The inventive subject matter, therefore, is not to be restricted except in the spirit of the appended claims.

Claims

1. An adjustable dumbbell comprising: a handle with carousals on each side of said handle;each carousal having a plurality of recesses for temporally retaining a removable weight in each of said plurality of recesses, andwherein said carousal retains said removable weights in a radial arrangement with a locking mechanism, andsaid locking mechanism controls a plurality of plunger cogs that are configured to engage and disengage into at least a portion of each of said removable weights.

2. The adjustable dumbbell according to claim 1, wherein said locking mechanism includes separate slots for each of said plurality of recesses.

3. The adjustable dumbbell according to claim 2, wherein said locking mechanism is a button having at least a major outside diameter and a minor outside diameter.

4. The adjustable dumbbell according to claim 3, wherein each said plunger cog has a tracking feature that follows said major outside diameter and said minor outside diameter to extend and retrack each said plunger cog.

5. The adjustable dumbbell according to claim 4, wherein each said plunger cog includes a spring that biases each said plunger cog.

6. The adjustable dumbbell according to claim 3, wherein said button is biases in an extended position whereby said plurality of plunger cogs are biased to be engaged into said at least a portion of each of said removable weights.

7. The adjustable dumbbell according to claim 2, wherein each of said plurality of plunger cogs is controlled by a knob that moves each of said plurality of plunger cogs within a curved slot.

8. The adjustable dumbbell according to claim 7, wherein said rotation of said locking knob moves each of said plurality of plunger cogs radially outward or radially inward.

9. The adjustable dumbbell according to claim 8, further includes a spring that is configured to provides tension to said locking knob to retain said weights.

10. The adjustable dumbbell according to claim 1, wherein said removable weights have a first rounded end and a second flattened end that is configured to prevent improper insertion of said removable weight into said recesses.

11. The adjustable dumbbell according to claim 10, wherein said locking knob is configured to be recessed below said second flattened end when said removable weight is inserted into said adjustable dumbbell.

12. The adjustable dumbbell according to claim 11, wherein said plurality of recesses are rounded pockets that are configured to conform around said first rounded end of said removable weight.

13. The adjustable dumbbell according to claim 12, wherein said first rounded end has a recess that is configured to mate onto a boss in each od said plurality of recesses.

14. The adjustable dumbbell according to claim 1, wherein each said removable weight has a recess that extends around a circumference of said removable weight.

15. The adjustable dumbbell according to claim 1, wherein said handle is connected to each carousal with a bearing whereby said carousal is configured to rotate independent from said handle.

16. The adjustable dumbbell according to claim 15, further includes a locking mechanism on each carousal that prevents rotation of at least one of said carousals.

17. The adjustable dumbbell according to claim 1, wherein said locking mechanism is configured to collectively lock or unlock said removable weights.

18. The adjustable dumbbell according to claim 1, wherein carousal is configured to retain a radially imbalanced eccentric amount of said removable weights in a radial arrangement whereby said radially imbalanced eccentric amount of said removable weights rotates said carousals on said handle.

19. The adjustable dumbbell according to claim 18, wherein said radially imbalanced eccentric amount of weights is configured to enable eccentric exercise by imparting centripetal motion to said handle.

20. The adjustable dumbbell according to claim 1, wherein said weights are 0.5 Kg to 2 Kg each.