Hand-held centripetal exercise devices

Abstract

A hand-held centripetal exercise devices are shown and disclosed. In one embodiment, the device includes an outer shell having a smooth outer surface. The outer shell defines an internal volume. The device additionally includes a single ball sized to be contained within the internal volume. The single ball having a predetermined mass.

What is claimed is: 
     
         1 . A hand-held device for exercise, comprising:
 an outer shell having a smooth outer surface, the outer shell defining an internal volume; and   a single ball sized to be contained within the internal volume, the single ball having a predetermined mass.   
     
     
         2 . The device of  claim 1 , wherein the outer shell is formed of two hemispheres, each hemisphere having a smooth outer surface. 
     
     
         3 . The device of  claim 2 , wherein the two hemispheres are fixedly attached together forming a circumferential groove therebetween. 
     
     
         4 . The device of  claim 3 , wherein the outer surface of each of the two hemispheres are free from grooves, dimples, ridges, protuberances, bumps, and structures other than the circumferential groove. 
     
     
         5 . The device of  claim 1 , further comprising an outer layer enclosing the outer shell. 
     
     
         6 . The device of  claim 5 , wherein the outer layer is made of one or more rubber materials. 
     
     
         7 . A hand-held device for exercise, comprising:
 an outer shell having a smooth outer surface, the outer shell defining an internal volume, wherein the outer shell is formed of two hemispheres, each hemisphere having a smooth outer surface, wherein the two hemispheres are fixedly attached together forming a circumferential groove therebetween, and wherein the outer surface of each of the two hemispheres are free from grooves, dimples, ridges, protuberances, bumps, and structures other than the circumferential groove; and   only a single ball sized to be contained within the internal volume, the single ball having a predetermined mass.   
     
     
         8 . A hand-held device for exercise, comprising:
 an outer shell having a smooth outer surface, the outer shell defining an internal volume, wherein the outer shell is formed of two hemispheres, each hemisphere having an outer surface having a plurality of dimples, and wherein the two hemispheres are fixedly attached together forming a circumferential groove therebetween; and   only a single ball sized to be contained within the internal volume, the single ball having a predetermined mass.   
     
     
         9 . The device of  claim 8 , further comprising an outer layer enclosing the outer shell, the outer layer having a uniform thickness . 
     
     
         10 . The device of  claim 9 , wherein the outer layer is made of one or more rubber materials. 
     
     
         11 . The device of  claim 8 , wherein the outer surface of each of the two hemispheres are free from grooves ridges, protuberances, bumps, and structures other than the circumferential groove and the dimples.