Golf club head with improved center of gravity

Abstract

A golf club head with a variable center of gravity is disclosed herein. More specifically, the present invention discloses a wedge type golf club head wherein the center of gravity of the golf club head is adjustable along an x-axis in a heel to toe direction utilizing weights that are placed substantially near a sole portion of the golf club head. The resulting golf club head may generally have a more toe biased center of gravity location, especially when compared to a traditional golf club head. The present invention also discloses an innovative way to construct the golf club head to achieve those desirable center of gravity locations by utilizing various attachment techniques with different materials having different densities.

What is claimed is: 
     
         1 . A golf club head comprising:
 a chassis further comprising a hosel near a heel side of said golf club head, a striking face portion near a frontal portion of said golf club head, and a rear opening at a rear portion of said golf club head;   a metallic back piece configured to at least partially fit in said rear opening, and   a metallic weight pad configured to at least partially fit in said rear opening further comprising a female rivet socket,
 wherein said rear opening further comprises a male rivet stud protruding out from a rear surface of said rear opening, adapted to engage said female rivet socket, 
 wherein said male rivet stud and said female rivet socket engage one another to retain said weight pad to said chassis, 
 wherein an internal surface of said metallic back piece further comprises a plurality of back piece cutouts, adapted to receive a supplemental weight, 
 wherein said plurality of back piece cutouts are all of different shapes, requiring different shapes of said supplemental weight depending on which specific plurality of back cutout is engaged, and 
   a supplemental weight adapted to at least partially engage said at least one of said plurality of back piece cutouts.   
     
     
         2 . The golf club head of  claim 1 , wherein said supplemental weight only partially fills said at least one of said plurality of back piece cutouts. 
     
     
         3 . The golf club head of  claim 1 , wherein said supplemental weight completely fills said at least one of said plurality of back piece cutouts. 
     
     
         4 . The golf club head of  claim 1 , wherein said back piece conceals said male rivet stud and said female rivet socket from view when combined with said weight pad to fill said rear opening. 
     
     
         5 . The golf club head of  claim 4 , wherein said weight pad is made out of a first material having a density of greater than about 7.8 g/cm 3 . 
     
     
         6 . The golf club head of  claim 5 , wherein at least one of said back piece or said weight pad further comprises a plurality of tabs, creating a gap between said at least one of said back piece and said chassis or said weight pad and said chassis. 
     
     
         7 . The golf club head of  claim 6 , wherein both said back piece and said weight pad further comprises a plurality of tabs. 
     
     
         8 . The golf club head of  claim 7 , wherein said plurality of tabs on both said back piece and said weight pad are adapted to engage said chassis. 
     
     
         9 . The golf club head of  claim 8 , wherein said gap is filled with an adhesive. 
     
     
         10 . The golf club head of  claim 1 , wherein said an internal surface of said weight pad further comprises a weight pad cutout, adapted to receive a supplemental weight. 
     
     
         11 . The golf club head of  claim 10 , wherein, said supplemental weight only partially fills said at least one of said weight pad cutout. 
     
     
         12 . The golf club head of  claim 11 , wherein said supplemental weight completely fills said at least one of said weight pad cutout. 
     
     
         13 . A golf club head comprising:
 a chassis further comprising a hosel near a heel side of said golf club head, a striking face portion near a frontal portion of said golf club head, and a rear opening at a rear portion of said golf club head;   a metallic back piece configured to at least partially fit in said rear opening, and   a metallic weight pad configured to at least partially fit in said rear opening further comprising a female rivet socket,
 wherein said rear opening further comprises a male rivet stud protruding out from a rear surface of said rear opening, adapted to engage said female rivet socket, 
 wherein said male rivet stud and said female rivet socket engage one another to retain said weight pad to said chassis, and 
   wherein at least one of said back piece or said weight pad further comprises a plurality of tabs, creating a gap between said at least one of said back piece and said chassis or said weight pad and said chassis.   
     
     
         14 . The golf club head of  claim 13 , wherein both said back piece and said weight pad further comprises a plurality of tabs. 
     
     
         15 . The golf club head of  claim 14 , wherein said plurality of tabs on both said back piece and said weight pad are adapted to engage said chassis. 
     
     
         16 . The golf club head of  claim 15 , wherein said gap is filled with an adhesive. 
     
     
         17 . The golf club head of  claim 16 , wherein a surface area of said rear opening is substantially similar to a combined internal projected surface area of said back piece and said metallic weight pad. 
     
     
         18 . The golf club head of  claim 17 , wherein said metallic weight pad is located at an upper toe portion of said golf club head. 
     
     
         19 . The golf club head of  claim 18 , wherein an internal surface of said metallic back piece further comprises a plurality of back piece cutouts, adapted to receive a supplemental weight,
 wherein said plurality of back piece cutouts are all of different shapes, requiring different shapes of said supplemental weight depending on which specific plurality of back cutout is engaged, and   a supplemental weight adapted to at least partially engage said at least one of said plurality of back piece cutouts.   
     
     
         20 . The golf club head of  claim 19 , wherein said supplemental weight only partially fills said at least one of said plurality of back piece cutouts.