MULTI-MATERIAL GOLF CLUB HEAD

• US 20180111027A1
• Filed: 12/21/2017
• Published: 04/26/2018
• Est. Priority Date: 11/18/2015
• Status: Active Grant

• Current Assignee: Acushnet Company (FILA Holdings Corp.)
• Original Assignee: Acushnet Company (FILA Holdings Corp.)
• Inventors: Funaki, Takeshi Casey, Takehara, Doug M., Ferguson, Gentry
• Granted Patent: US 10,569,143 B2
• Time in Patent Office: Days
• CPC Class Codes: A63B 2053/0491 with added weights, e.g. changeable, replaceable
• CPC Class Codes: A63B 2209/00 Characteristics of used materials
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0437 with special crown configurations
• CPC Class Codes: A63B 53/0466 wood-type
• CPC Class Codes: A63B 60/02 Ballast means for adjusting the centre of mass A63B60/24, A63B60/54 take precedence

Abstract

A golf club head made out of multi-material is disclosed herein. More specifically, the golf club head in accordance with the present invention has at least a portion of the body of the golf club head that is further comprised out of a base layer and a lightweight cover layer. The base layer may have a plurality of cutouts to help reduce unnecessary mass and the lightweight cover layer may be made out of an ultra-lightweight material to further reduce the unnecessary mass. The resulting golf club head may generally have a deep CG wherein the CG-B location is about 37 mm, and a CG-C location is greater than about 25 mm.

Claims

1. A golf club head comprising:

a striking face portion located at a frontal portion of said golf club head;

a body portion attached to an aft portion of said striking face portion further comprising a bridge member creating a heel body portion and a toe body portion; and

a weighting member located at a rear aft portion of said bridge member of said body portion,

wherein said golf club head has a Center of Gravity location having a CG-C location greater than about 25 mm,

wherein said weighting member has a mass of greater than about 20 grams, and

wherein said weighting member is invisible from an external portion of said golf club head.

2. The golf club head of claim 1, wherein said weighting member has a mass of greater than about 22.5 grams.

3. The golf club head of claim 2, wherein said weighting member has a mass of greater than about 25 grams.

4. The golf club head of claim 3, wherein said CG-C location is greater than about 27.5 mm.

5. The golf club head of claim 4, wherein said CG-C location is greater than about 30 mm.

6. The golf club head of claim 5, wherein said heel body portion and said toe body portion further comprises a base layer and a lightweight cover layer, wherein said base layer further comprises a plurality of cutouts, and said lightweight cover layer has an Internal Exposure Percentage of between about 15% to about 60%.

7. The golf club head of claim 6, wherein said lightweight cover layer has an Internal Exposure Percentage of between about 25% to about 50%.

8. The golf club head of claim 7, wherein said lightweight cover layer has an Internal Exposure Percentage of between about 25% to about 45%.

9. The golf club head of claim 8, wherein said lightweight cover layer is made out of a material having a density of between about 4.0 g/cm³ and about 4.7 g/cm³.

10. The golf club head of claim 9, wherein said lightweight cover layer is made out of a material having a density of between about 4.1 g/cm³ and about 4.6 g/cm³.

11. The golf club head of claim 10, wherein said lightweight cover layer is made out of a material having a density of about 4.5 g/cm³.

12-1. The golf club head of claim 11, wherein said mass of said rear central portion is greater than a mass of said lightweight rear heel portion and said lightweight rear toe portion combined.

12. A golf club head comprising:

a frontal portion including a striking face portion, defined as any portion of said golf club head located forward of a bifurcation line, said bifurcation line is defined as a plane placed at a distance of 10 mm behind a hosel bore axis;

a rear portion further comprising a lightweight rear toe portion, a lightweight rear heel portion, and a rear central portion;

defined by a plurality of trifurcation lines placed at a distance of 15 mm on each side of a geometric center of a striking face;

wherein a mass of said rear central portion is greater than a mass of said lightweight rear heel portion,

wherein said mass of said rear central portion is greater than a mass of said lightweight rear toe portion,

wherein said rear central portion further comprises a weight member located at a rear portion of said central portion, said weight member having a mass of greater than about 5 grams, and

wherein said weighting member is invisible from an external portion of said golf club head.

13. The golf club head of claim 12, wherein said weighting member has a mass of greater than about 7 grams.

14. The golf club head of claim 13, wherein said weighting member has a mass of greater than about 9 grams.

15. The golf club head of claim 14, wherein said golf club head has a Center of Gravity location having a CG-C location greater than about 25 mm.

16. The golf club head of claim 15, wherein said CG-C location is greater than about 27.5 mm.

17. The golf club head of claim 16, wherein said CG-C location is greater than about 30 mm.

18. The golf club head of claim 12, wherein weight member said is retained using a fastener.

19. The golf club head of claim 18, wherein said weight member is retained using a brazing process.