Dumbbell Head Impact Protection Structure

Abstract

Dumbbell assembly tends to break from its outer edge, despite having a cushioning coating. Present invention discloses and claims a “groove” structure that enhances the durability of the coating at minimal cost, reducing the frequency to re-coating dumbbell weight heads.

1 . Dumbbell head impact protection structure, comprising:
 a. a cylindrical dumbbell head having an annular groove removed from one end farthest from the handle bar; and,   b. a layer of coating material wrapped around said dumbbell head so that the coating has extra thickness at the place of said annular groove.   
   
   
       2 . Dumbbell head structure of  claim 1  wherein said annular groove is in the shape similar to a stair step. 
   
   
       3 . Dumbbell head structure of  claim 1  wherein the exposed surface of annular groove is machined to have small notches to enhance contact area with coating material. 
   
   
       4 . Dumbbell head structure of  claim 1  wherein the exposed surface of annular groove is machined to have small bumps to enhance contact area with coating material. 
   
   
       5 . Dumbbell head structure of  claim 1  wherein the exposed surface of annular groove is machined to have small notches and bumps to enhance contact area with coating material.