Multi-component putter

Abstract

An embodiment of a putter type golf club head with an upper and lower portion, made from two different materials, is enclosed herein. Other embodiments are described herein.

What is claimed is: 
     
         1 . A putter type golf club head comprising:
 an upper portion and a lower portion;
 wherein the upper portion is made from a first material having a first density and the lower portion is made from a second material having a second density; 
 wherein the first density is less than the second density; 
   the lower portion comprises a toe mass and a heel mass, and defines a loft plane;
 wherein the toe mass and the heel mass are integral to the lower portion; and 
 the toe mass and heel mass extend from the lower portion, in a direction away from a ground plane, and toward the upper portion; and 
   the upper portion is affixed to the lower portion, is farther from a ground plane than the lower portion, and is spaced rearward from the loft plane, such that the lower portion does not reside along the loft plane;   a volume and a mass;
 wherein the lower portion comprises less than 30% of the volume of the putter type golf club head; and wherein the lower portion comprises greater than 50% of the mass of the putter type golf club head. 
   
     
     
         2 . The putter type golf club head of  claim 1 , wherein the first density of the first material is less than 6.0 g/cc. 
     
     
         3 . The putter type golf club head of  claim 1 , wherein the second density of the second material is greater than 7.0 g/cc. 
     
     
         4 . The putter type golf club head of  claim 1 , wherein the second density of the second material is at least 2 times greater than the first density of the first material. 
     
     
         5 . The putter type golf club head of  claim 1 , wherein the first material comprises any one or a combination of the following: 8620 alloy steel, S25C steel, carbon steel, maraging steel, 17-4 stainless steel, 303 stainless steel, 304 stainless steel, stainless steel alloy, tungsten, aluminum, aluminum alloy, ADC-12, or any metal suitable for creating a golf club head. 
     
     
         6 . The putter type golf club head of  claim 1 , wherein the second material comprises any one or a combination of the following: 8620 alloy steel, S25C steel, carbon steel, maraging steel, 17-4 stainless steel, 303 stainless steel, 304 stainless steel, stainless steel alloy, tungsten, aluminum, aluminum alloy, ADC-12, or any metal suitable for creating a golf club head. 
     
     
         7 . The putter type golf club head of  claim 1 , wherein the first material is ADC-12 and the second material is 304 stainless steel. 
     
     
         8 . A putter type golf club head comprising:
 an upper portion and a lower portion;   wherein the upper portion is made from a first material having a first density and the lower portion is made from a second material having a second density;   wherein the first density is less than the second density;   the lower portion comprises a toe end, a heel end opposite the toe end, a front surface, a rear wall opposite the front surface, a rear portion, and an under surface;
 wherein a recess extends inward from the front surface towards the rear wall; 
   the upper portion comprises a hitting surface, an adhesion surface opposite the hitting surface, and a lower edge;
 wherein the lower edge protrudes in a direction away from the hitting surface; 
   wherein the adhesion surface is affixed within the recess of the lower portion;   wherein the front surface and the hitting surface align to form a strike face;   wherein the putter type golf club head comprises a sole formed by the lower edge of the upper portion and the under surface of the lower portion; and   wherein the first material and the second material are both metallic materials.   
     
     
         9 . The putter type golf club head of  claim 8 , further comprising a center of gravity and a y-axis extending vertically through the center of gravity;
 wherein a moment of inertia measured about the y-axis is at least 15% greater than a similar putter constructed of a single material and comprising identical mass and volume.   
     
     
         10 . The putter type golf club head of  claim 8 , wherein the first material comprises any one or a combination of the following: 8620 alloy steel, S25C steel, carbon steel, maraging steel, 17-4 stainless steel, 303 stainless steel, 304 stainless steel, stainless steel alloy, tungsten, aluminum, aluminum alloy, or ADC-12. 
     
     
         11 . The putter type golf club head of  claim 8 , wherein the second material comprises any one or a combination of the following: 8620 alloy steel, S25C steel, carbon steel, maraging steel, 17-4 stainless steel, 303 stainless steel, 304 stainless steel, stainless steel alloy, tungsten, aluminum, aluminum alloy, and ADC-12. 
     
     
         12 . The putter type golf club head of  claim 8 , wherein the first density of the first material is less than 6.0 g/cc. 
     
     
         13 . The putter type golf club head of  claim 8 , wherein the second density of the second material is greater than 7.0 g/cc. 
     
     
         14 . The putter type golf club head of  claim 8 , wherein the upper portion comprises an alignment feature selected from the group consisting of: a line, a circle, a dashed line, a triangle, and a channel. 
     
     
         15 . The putter type golf club head of  claim 8 , wherein the lower portion comprises an alignment feature selected from the group consisting of: a line, a circle, a dashed line, a triangle, and a channel. 
     
     
         16 . The putter type golf club head of  claim 8 , wherein the club head comprises a heel-to-toe moment of inertia between 5000 g·cm 2 -6500 g·cm 2 . 
     
     
         17 . The putter type golf club head of  claim 8 , wherein the adhesion surface and the hitting surface are parallel. 
     
     
         18 . The putter type golf club head of  claim 8 , wherein the rear wall does not make up a portion of the sole. 
     
     
         19 . The putter type golf club head of  claim 8 , wherein the upper portion and lower portion are joined in any one or combination of the following methods: welding, soldering, brazing, swedging, adhesion, epoxy, or mechanical fastening.