# US 10,864,403 B2 · Selectorized dumbbell with a weight selector having a continuous periphery that encloses an open interior

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- Number: US 10,864,403 B2
- Document ID: US10864403B2
- Status: Granted
- Kind: B2
- Application number: 16/232,428
- Filed: 2018-12-26
- Published: 2019-06-27
- Granted: 2020-12-15
- Earliest claimed: 2016-01-26
- Assignees: PowerBlock Holdings, Inc.
- Applicants: PowerBlock Holdings, Inc.
- Inventors: Carl K. Towley, III
- Web page: https://patentgrep.com/patent/US10864403B2

## CPC

- A63B 21/075: with variable weights {, e.g. weight systems with weight selecting means for bar-bells or dumb-bells}
- A63B 21/00065: {by increasing or reducing the number of resistance units}
- A63B 21/0726: {Dumb bells, i.e. with a central bar to be held by a single hand, and with weights at the ends}
- A63B 21/0728: {with means for fixing weights on bars, i.e. fixing olympic discs or bumper plates on bar-bells or dumb-bells}
- A63B 23/12: for upper limbs {or related muscles, e.g. chest, upper back or shoulder muscles (bench press exercises A63B21/078; for teaching music G09B15/06)}
- A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H)

## Abstract

A selectorized dumbbell has a plurality of nested weights that provide a stack of left weight plates and a stack of right weight plates. A handle is dropped between the stacks and a selector is inserted into one of a plurality of vertically spaced positions on the handle to couple a selected number of the weights to the handle. The selector has a continuous periphery enclosing an open interior. A user who is exercising with the dumbbell will be alerted to unintended dislodgement of the selector since a portion of the selector's periphery will contact a portion of the user's grip hand, wrist or forearm during such dislodgement. This prevents complete dislodgement and prompts the user to restore the selector to a fully installed position. Side walls of the selector may become curved when the selector is installed to provide an additional frictional force resisting dislodgement of the selector.

## Claims

### Claim 1

A selectorized dumbbell, which comprises:
(a) a plurality of nested weights that provide a stack of left weight plates and a stack of right weight plates;
(b) a handle;
(c) at least one selector that is insertable into a selected one of a plurality of vertically spaced positions to couple a selected number of the weights to the handle; and
(d) wherein arrays of vertically spaced, inwardly facing, left and right slots are carried on the handle with each left slot having a corresponding right slot at an identical elevation so that a plurality of corresponding sets of slots at different vertical elevations are provided by the arrays of slots with the sets of slots defining the plurality of vertically spaced positions into which the selector may be inserted, wherein the arrays of left and right slots are open to and communicate with a space or volume provided within the handle between left and right ends of the handle, and wherein the at least one selector is received within one selected set of the inwardly facing slots.

### Claim 2 (depends on 1)

The dumbbell of claim 1, wherein the at least one selector is a single selector which comprises a four sided plane figure having an open interior defined by three continuous sides and a fourth side that is at least partially continuous.

### Claim 3 (depends on 2)

The dumbbell of claim 2, wherein the fourth side is entirely continuous.

### Claim 4 (depends on 2)

The dumbbell of claim 2, wherein the plane figure comprises a square or rectangle.

### Claim 5 (depends on 1)

The dumbbell of claim 1, wherein the at least one selector is a single selector having three sides arranged in a U-shape.

### Claim 6 (depends on 1)

The dumbbell of claim 1, wherein the at least one selector comprises a pair of separate selectors.