This invention relates to the field of exercise equipment and specifically to hand held weights in the form of dumbbells.
Adjustable weight dumbbells are known that use an elongated, cylindrical bar as the handle. An inner collar is inset inwardly from each end of the bar with the collar being releasably fixed to the bar by some type of fastener or holding device. The inset provides a space on each end of the bar that is used to support one or more weight plates on the ends of the bar outboard of the inner collars. After the user stacks a desired number of weight plates on the ends of the bar, the user installs an outer collar on each end of the bar to hold the stacked weight plates on the ends of the bar to prevent the weight plates from sliding off the bar during exercise. The user adjusts the exercise mass of the dumbbell by changing the number of weight plates that are held between the inner and outer collars on each end of the bar. Typically, the weight plates are flat, circular plates having a central bore for slipping the weight plates onto the bar.
To use the dumbbell described above, the user merely grabs the center of the bar between the stacks of weight plates on the ends of the bar. Inherently, the user's hand is positioned centrally between the stacks of weight plates along a centerline of the bar, which is also a centerline of the stacked weight plates. The user can then lift and manipulate the dumbbell in any of the known ways to perform various weight training exercises, such as arm curls, arm presses, etc.
In the past, one manufacturer of dumbbells of the type described above has offered an optional U-shaped handle for converting this type of dumbbell to a kettlebell style. The bottoms of the spaced legs of the U-shaped handle were formed with circular bores that were designed to slide onto the bar that formed the usual handle for the dumbbell. The user would remove weight plates and the inner and outer collars from one end of the bar to provide access to the center of the bar. The user would then slip the U-shaped handle onto the bar from this end of the bar, namely the end of the bar from which the weight plates and collars had been removed, simply by telescoping or inserting the bores in the legs of the U-shape onto the bar and by then sliding the U-shaped handle inwardly to the center of the bar. The removed weight plates and collars could then be replaced onto the end of the bar from which they had been taken.
When so installed as described above, the U-shaped handle was captured between the inner collars on the bar. In addition, the legs of the U-shaped handle were long enough so that the base of the U-shaped handle, namely the connecting piece between the two legs of the handle, was positioned to be parallel to the bar but to be vertically displaced above the weight plates. Thus, the user could now grab the base of the U-shaped handle and swing or manipulate the dumbbell in the manner of a kettlebell. Thus, a standard adjustable weight dumbbell could be converted in this manner to a kettlebell type of exercise device.
Other adjustable weight dumbbells are known which are referred to as selectorized dumbbells, such as that shown in U.S. Pat. No. 5,637,034 as also shown in
In a selectorized dumbbell of the type described above and as shown in
One aspect of this invention relates to a selectorized dumbbell which comprises a plurality of nested weights comprising a stack of nested left weight plates and a stack of nested right weight plates separated by a gap. At least a first handle is provided with the handle having a hand grip extending along an axis with the handle further having opposite, substantially planar left and right ends that are rigidly joined to one another. The handle may be dropped down into the gap between the stacks of nested left and right weight plates such that the left end of the handle is adjacent an innermost left weight plate in the left stack of weight plates and the right end of the handle is adjacent an innermost right weight plate in the right stack of weight plates. A selector is movable into different positions relative to the handle and relative to the weight plates for coupling selected numbers of left weight plates to the left end of the handle and selected numbers of right weight plates to the right end of the handle. The hand grip of the first handle comprises an upwardly extending loop that is fixed at a bottom portion thereof between the left and right ends of the handle to join the left and right ends of the handle together and with the loop having a top gripping portion that is vertically positioned above the left and right ends of the handle and above top edges of the weight plates in the manner of a kettlebell exercise device.
Another aspect of this invention relates to a selectorized dumbbell, which comprises a plurality of nested weights comprising a stack of nested left weight plates and a stack of nested right weight plates separated by a gap. A handle is provided having a first hand grip extending along an axis with the handle further having opposite, substantially planar left and right ends joined to opposite ends of the hand grip with the left and right ends of the handle extending perpendicularly to the hand grip. The first hand grip of the handle extends substantially horizontally between top and bottom edges of the left and right ends of the handle such that the first hand grip of the handle will be located below top edges of the weight plates in the manner of a standard dumbbell. A selector is movable into different positions relative to the handle and relative to the weight plates for coupling selected numbers of left weight plates to the left end of the handle and selected numbers of right weight plates to the right end of the handle. A second hand grip is provided comprising a loop that is carried on the handle. The loop is movable relative to the handle between a first operative position in which a top gripping portion of the loop is vertically positioned above the left and right ends of the handle and above top edges of the weight plates in the manner of a kettlebell exercise device and a second non-operative position in which the top gripping portion of the loop is disposed between the left and right ends of the handle. The user can use the dumbbell in the manner of a kettlebell exercise device by moving the second hand grip comprising the loop into its first, operative position and by grasping the top gripping portion of the loop or in the manner of a standard dumbbell by disposing the top gripping portion of the loop in its second non-operative position and by grasping the first hand grip rather than the top gripping portion of the loop.
Yet another aspect of this invention relates to a selectorized dumbbell which comprises a plurality of nested weights comprising a stack of nested left weight plates and a stack of nested right weight plates separated by a gap. A handle is provided having opposite, substantially planar left and right ends that are rigidly joined to one another. The handle may be dropped down into the gap between the stacks of nested left and right weight plates such that the left end of the handle is adjacent an innermost left weight plate in the left stack of weight plates and the right end of the handle is adjacent an innermost right weight plate in the right stack of weight plates. The handle carries a pair or hand grips thereon comprising a first cylindrical bar type hand grip that in use is substantially horizontal and extends between the left and right ends of the handle and is disposed beneath top edges of the weight plates in the manner of a standard dumbbell and a second loop type hand grip that in use has a top gripping portion that that is vertically positioned above the left and right ends of the handle and above top edges of the weight plates in the manner of a kettlebell exercise device. A selector is movable into different positions relative to the handle and relative to the weight plates for coupling selected numbers of left weight plates to the left end of the handle and selected numbers of right weight plates to the right end of the handle.
This invention will be described more completely in the following Detailed Description, when taken in conjunction with the following drawings, in which like reference numerals refer to like elements throughout.
A selectorized dumbbell of the type with which this invention can be used is shown as 2 in
One characteristic of dumbbell 2 is the use of a plurality of nested weights 4. Each weight 4 comprises a left weight plate 6l, a right weight plate 6r, and a pair of side rails 8 that hold weight plates 6 in a spaced apart orientation. Side rails 8 are attached in any suitable manner to the front and back edges of the pair of weight plates 6 that form one of weights 4 at the same vertical height along the front and back edges.
Weights 4 are nested in the sense that the left and right weight plates 6l and 6r in each weight 4 are progressively spaced apart slightly further from one another. Thus, all of the left weight plates 6l are nested against one another in a set of nested left weight plates 6l and all of the right weight plates 6r are nested against one another in a set of nested right weight plates 6r. Obviously, to make this happen, side rails 8 used in each weight 4 in a set of weights 4 have progressively longer lengths. Side rails 8 used in the innermost weight will be the shortest with side rails 8 then becoming progressively longer as required to space weight plates 6 in the other weights 4 progressively further apart. This is shown in
A gap 12 is provided between the sets of nested left weight plates 6l and nested right weight plates 6r. A handle 14 can be dropped down into gap 12. Handle 14 has a pair of opposite left and right ends 18l and 18r that are connected together by spacers or cross tubes 20. The user can drop his hand down between the two upper cross tubes 20 to grip a hand grip 22 that extends between the ends 18l and 18r of handle 14 parallel to cross tubes 20. Hand grip 22 fixedly connects to the laterally spaced ends 18l and 18r of handle 14 approximately at the centers of the ends 18l and 18r of handle 14.
Each end 18l and 18r of handle 14 has a vertical array of slots 24 that traverse across the end 18l and 18r of handle 14 from the front to the back of handle 14. Slots 24 are substantially horizontal grooves or shelves cut or formed into the ends 18l and 18r of handle 14. Slots 24 are adapted to receive a pair of horizontal prongs on a selector 26 that is used to adjust how many weights are attached to handle 14.
Once handle 14 has been inserted by the user in gap 12, a desired number of weights 4 can be selectively coupled to handle 14 depending upon how selector 26 is positioned. If selector 26 is inserted into handle 4 beneath the lowermost side rails 8, then selector 26 will pick up all weights 4 when handle 14 is lifted. Moving selector 26 up will pick up fewer weights to thereby adjust the exercise mass carried by handle 14. Essentially, only those weights 4 whose side rails 8 are above the location of selector 26 will be coupled to handle 14.
It would be possible for dumbbell hand grip 22 and for kettlebell hand grip 28 to each be removable and replaceable from within handle 14, e.g. by unbolting or unscrewing one hand grip and by then installing the other hand grip. Thus, one would convert dumbbell 2 from its traditional dumbbell use to kettlebell use by swapping out just the hand grip portions 22 or 28 of handle 14. However, it would also be possible to sell and for a user to purchase two complete handles 14, one with a dumbbell hand grip 22 and the other with a kettlebell hand grip 28, with the user simply using whichever handle 14 that he or she desires at any given time. This latter alternative is attractive because the user does not have to bolt or unscrew anything to make the conversion. All the user has to do is pick up whichever handle 14 that has the hand grip style the user wishes to use and then drop that handle down into gap 12 of dumbbell 2.
As shown in
Kettlebell hand grips 28, 28′ as shown in the embodiments of
Handle 14 for a third embodiment of a dumbbell 2 according to this invention is shown in
Handle 14 of the third embodiment of dumbbell 2 has all the characteristics of the usual handle for a PowerBlock® dumbbell, namely spaced left and right ends 18l and 18r, upper cross tubes 20 and a dumbbell hand grip 22. However, in this embodiment, handle 14 includes a kettlebell hand grip 28″ forming a loop 30″ that is installed on handle 14 and is carried with handle 14 in addition to dumbbell hand grip 22. Kettlebell hand grip 28″ is selectively movable on handle 14 between a lowered, stowed position and a raised, accessible position. In the lowered, stowed position thereof as shown in
Kettlebell hand grip 28″ is U-shaped with loop 30″ being formed by the U-shape. Kettlebell hand grip 28″ has a pair of aligned circular openings 34 in the ends of the legs thereof. This allows kettlebell hand grip 28″ to be pivotally mounted on one of the cross tubes 20 of handle 14. The pivoting action of hand grip 28″ around cross tube 20, as indicated by arrow A in
A detent or lock mechanism is provided in handle 14 to securely hold kettlebell hand grip 28″ in its lowered, stowed position or in its raised, accessible position. Such detent or lock mechanism comprises spring biased pop pins 36 that are received in sockets 38 beneath cross tube 20 in each 18l and 18r of handle 14. See
One hole 40a is located on one side of opening 34 and is effective to lock hand grip in its lowered, stowed position as shown in
The embodiment of dumbbell 2 shown in
Various modifications of this invention will be apparent to those of skill in the art. Accordingly, the scope of this invention is to be limited only by the appended claims.
This application claims the benefit of one or more previously filed provisional applications identified as follows: Application Ser. No. 61/229,857 filed Jul. 30, 2009.
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Number | Date | Country | |
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20110028285 A1 | Feb 2011 | US |
Number | Date | Country | |
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61229857 | Jul 2009 | US |