Elastic spherical hand muscle developer

Abstract

An elastic spherical hand muscle developer is constructed having an elastic spherical body formed of an inner layer and an outer layer, an air chamber defined within the spherical body and surrounded by the inner layer, an air valve embedded in the spherical body and adapted for pumping air into the air chamber, and at least one handle formed of a part of the inner layer and outer layer of the spherical body, each handle defining a through hole for the insertion of the hand.

What the invention claimed is:  
     
         1 . An elastic spherical hand muscle developer comprising an elastic spherical body, said spherical body having an inner layer and an outer layer, an air chamber defined within said spherical body and surrounded by said inner layer, and an air valve embedded in said spherical body and adapted for pumping air into said air chamber, wherein said spherical body has at least one through hole disposed outside said air chamber, forming a handle.  
     
     
         2 . The elastic spherical hand muscle developer as claimed in  claim 1  wherein said spherical body has one through hole disposed outside said air chamber, forming a handle, said handle comprising a first smoothly arched inner face and a second smoothly arched inner face disposed at two sides of said through hole.  
     
     
         3 . The elastic spherical hand muscle developer as claimed in  claim 1  wherein said spherical body has two through holes symmetrically disposed at two sides outside said air chamber, forming a respective handle, said handle having a first smoothly arched inner face and a second smoothly arched inner face disposed at two sides of the corresponding through hole.