Multi-component putter

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 upper portion of the putter type golf club head comprises a toe end, a heel end, a strike face, a rear wall, a back edge, a crown, and an under surface;

the lower portion comprises a front periphery, a rear periphery, a sole, a toe side wing, and a heel side wing, wherein the toe side wing and the heel side wing extend beyond the rear wall of the upper portion;

wherein the rear periphery, toe side wing, and heel side wing form a gap, wherein the gap is bounded by the rear periphery, toe side wing, and heel side wing;

the lower portion further comprises a front toe mass and a front heel mass, wherein both the front toe mass and the front heel mass extend upwardly from the lower portion to the upper portion;

wherein the under surface, strike face, and rear wall of the upper portion form a first cavity proximate the toe end and a second cavity proximate the heel end, wherein the first and second cavities extend inward from the under surface towards the crown, but do not reach the crown; and

wherein the front toe mass and the front heel mass are configured to mate with the first and second cavities, respectively.

2. The putter type golf club head of claim 1 , wherein the toe side wing and heel side wing extend perpendicularly from the rear periphery such that a first right angle is formed at a junction of the toe side wing and the rear periphery and a second right angle is formed at a junction of the heel side wing and the rear periphery.

3. The putter type golf club head of claim 1 , wherein the crown extends away from the strike face, over the front periphery of the lower portion, and to the back edge of the upper portion.

4. The putter type golf club head of claim 1 , wherein the crown further comprises an alignment trough adjacent the rear wall and approximately perpendicular to the strike face;

wherein the alignment trough is bounded by the back edge, the rear wall, and the crown.

5. The putter type golf club head of claim 4 , wherein the alignment trough comprises a width of approximately 4.27 cm.

6. The putter type golf club head of claim 1 , wherein the club head further comprises a mass and a volume;

wherein the lower portion comprises less than 40% of the volume of the club head and at least 45% of the mass of the club head.

7. The putter type golf club head of claim 1 , wherein the club head comprises a heel-to-toe moment of inertia between 5000 g·cm 2 -6500 g·cm 2 .

8. The putter type golf club head of claim 1 , wherein the front toe mass and front heel mass are integral with the lower portion.

9. The putter type golf club head of claim 1 , wherein the first material comprises any one or 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.

10. The putter type golf club head of claim 1 , wherein the second material comprises any one or 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.

11. The putter type golf club head of claim 1 , wherein the first density of the first material is less than 6.0 g/cc.

12. The putter type golf club head of claim 1 , wherein the second density of the second material is greater than 7.0 g/cc.

13. The putter type golf club head of claim 1 , 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.

14. The putter type golf club head of claim 1 , further comprising a toe wing mass and a heel wing mass;

wherein the toe wing mass extends upwardly from the lower portion toward the upper portion and is positioned along at least a portion of the toe side wing; and

wherein the heel wing mass extends upwardly from the lower portion toward the upper portion and is positioned along at least a portion of the heel side wing.

15. 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 upper portion of the putter type golf club head comprises a toe end, a heel end, a strike face, a rear wall, a back edge, a crown, and an under surface;

the lower portion comprises a front periphery, a rear periphery, a sole, a toe side wing, and a heel side wing, wherein the toe side wing and the heel side wing extend beyond the rear wall of the upper portion;

the lower portion further comprises at least one front adhesion portion extending upwardly from the lower portion to the upper portion;

wherein the under surface forms at least one cavity extending inward from the under surface towards the crown; and

wherein the at least one cavity and the at least one front adhesion portion comprise geometries configured to mate with one another to join the upper portion and lower portion.

16. The putter type golf club head of claim 15 , wherein the toe side wing and heel side wing extend perpendicularly from the rear periphery such that a first right angle is formed at a junction of the toe side wing and the rear periphery and a second right angle is formed at a junction of the heel side wing and the rear periphery.

17. The putter type golf club head of claim 15 , wherein the club head further comprises a mass and a volume;

wherein the lower portion comprises less than 40% of the volume of the club head and at least 45% of the mass of the club head.

18. The putter type golf club head of claim 15 , wherein the club head comprises a heel-to-toe moment of inertia between 5000 g·cm 2 -6500 g·cm 2 .