Patent ID: 8585560

Claim:
A device for developing hands muscles, the device comprising: a central body defining a hollow, the central body thus acting as a container, the central body defining a plurality of orifices; a plurality of flexible transparent tubes, each flexible transparent tube defining a longitudinal axis, a proximal end attached to the central body and a distal end, each flexible transparent tube being open at the proximal and distal ends; a plurality of moving parts, each moving part being in one of the transparent tubes, each moving part including a body, and a plurality of projections, each projection defining a proximal end attached to the body, and a distal end in contact with corresponding transparent tube, wherein the proximal end of each projection defines a first distance from the proximal end of the corresponding transparent tube, and the distal end of the projection defines a second distance from the proximal end of the corresponding transparent tube, the second distance being greater than the first distance, the projection being configured to vary a degree of inclination with respect to the longitudinal axis of the corresponding transparent tube while in contact with the corresponding transparent tube, the moving part being thereby configured to move toward the proximal end of the corresponding transparent tube when the corresponding transparent tube is compressed by a user.