Composite-metal golf club head

• US 5,624,331 A
• Filed: 10/30/1995
• Issued: 04/29/1997
• Est. Priority Date: 10/30/1995
• Status: Expired due to Fees

• Current Assignee: Pro-Kennex, Inc.
• Original Assignee: Pro-Kennex, Inc.
• Inventors: Liao, Hsueh-Cheng, Chung, Wu-Hsiang, Lo, Kun-Nan
• Primary Examiner(s): Graham, Mark S.
• Application Number:
  US08/544,965
• Time in Patent Office: 547 Days
• Field of Search: 273/167 H, 273/167 R, 273/78, 273/173, 473/324, 473/329, 473/345, 473/346, 473/347, 473/348, 473/344, 473/350
• US Class Current: 473/345
• CPC Class Codes: A63B 2209/00 Characteristics of used materials
• CPC Class Codes: A63B 2209/023 Long, oriented fibres, e.g. wound filaments, woven fabrics, mats
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0416 Heads having an impact surface provided by a face insert
• CPC Class Codes: A63B 53/0437 with special crown configurations
• CPC Class Codes: A63B 53/0466 wood-type

Abstract

A composite-metal wood-style golf club head having a metal casing with at least two openings in the crown in which composite covers are disposed. The portion of the metal casing between the covers defines a bar-like stiffener that extends between the face and the back in a direction generally perpendicular to the face. The metal stiffener braces and reinforces the face against flexure during impact with the ball, while the composite covers optimize weight distribution and provide other advantages. The club head may include a composite core with a relative thick portion behind the hitting face to further reinforce the hitting face against flexure.

Claims

1. A composite-metal wood-style golf club head having a crown, a hitting face, a back, a sole, a heel, a toe, a total surface area, and a total weight, comprising:

a generally hollow metal head casing, said metal head casing having first and second openings with an elongated stiffener portion between said first and second openings and extending over said crown between said hitting face and said back; and

at least one composite element disposed within said head casing and having portions disposed in said first and second openings.

2. The composite-metal wood-style golf club recited in claim 1, wherein said at least one composite element comprises:

a first composite cover disposed in said first opening; and

a second composite cover disposed in said second opening.

3. The composite-metal wood-style golf club recited in claim 1, further comprising a composite core within said head casing.

4. The composite-metal wood-style golf club recited in claim 3, wherein a portion of said core adjacent said hitting face has a thickness of at least 2.0 min.

5. The composite-metal wood-style golf club recited in claim 1, wherein said openings are in said crown.

6. The composite-metal wood-style golf club recited in claim 1, wherein said portion of said metal casing defining said hitting face has a thickness of approximately 1.5 min.

7. The composite-metal wood-style golf club recited in claim 1, wherein a portion of said head casing extends from said back to said crown and adjoins an end of said stiffener on said crown.

8. The composite-metal wood-style golf club recited in claim 1, wherein said stiffener has a generally rectangular cross-sectional shape.

9. The, composite-metal wood-style golf club recited in claim 1, wherein said stiffener is generally perpendicular to said hitting face.

10. The composite-metal wood-style golf club recited in claim 1, wherein said stiffener has a width equal of between 3% and 15% of distance between said heel and said toe.

11. The composite-metal wood-style golf club recited in claim 10, wherein said stiffener has a thickness of between 2% and 20% of said width.

12. The composite-metal wood-style golf club recited in claim 1, wherein the combined surface area of said first and second composite covers is between 15% and 50% of said total surface area.

13. The composite-metal wood-style golf club recited in claim 1, wherein the combined weight of said first and second composite covers is between 7% and 20% of said total weight.

14. A composite-metal wood-style golf club head having a crown, a hitting face, a back, a sole, a heel, a toe, a total surface area, and a total weight, comprising:

a generally hollow metal head casing, said metal head casing having first and second openings in said crown with an elongated stiffener portion between said first and second openings extending over said crown and generally perpendicular to said hitting face;

a first composite cover disposed in said first opening;

a second composite cover disposed in said second opening; and

composite core within said head casing.

15. The composite-metal wood-style golf club recited in claim 14, wherein a portion of said core adjacent said hitting face has a thickness of at least 3.0 mm.

16. The composite-metal wood-style golf club recited in claim 15, wherein said portion of said metal casing defining said hitting face has a thickness of at least 1.0 mm.

17. The composite-metal wood-style golf club recited in claim 14, wherein said stiffener has a width of between 3% and 15% of the distance between said heel and said toe.

18. The composite-metal wood-style golf club recited in claim 14, wherein said stiffener has a thickness of between 2% and 20% of said width.

19. The composite-metal wood-style golf club recited in claim 14, wherein the combined surface area of said first and second composite covers is between 15% and 50% of said total surface area.

20. The composite-metal wood-style golf club recited in claim 14, wherein the combined weight of said first and second composite covers is between 7% and 20% of said total weight.

21. A method for manufacturing a composite-metal wood-style golf club head having a crown, a hitting face, a back, a sole, a heel, a toe, a total surface area, and a total weight, comprising:

forming a generally hollow metal head casing, said metal head casing having first and second openings with an elongated stiffener portion between said first and second openings and extending over said crown between said hitting face and said back;

forming at least one composite element; and

inserting said at least one composite element into said head casing with portions of said at least one composite element disposed in said first and second openings, thereby forming a head assembly; and

heating said head assembly.

22. The method for manufacturing a composite-metal wood-style golf club head recited in claim 21, wherein:

said step of forming at least one composite element comprises the step of forming a first composite cover and a second composite cover; and

said step of inserting said at least one composite element into said head casing comprises the steps of inserting said first composite cover into said first opening and inserting said second composite cover into said second opening.

23. The method for manufacturing a composite-metal wood-style golf club head recited in claim 22, wherein:

said step of forming at least one composite element further comprises the step of forming a composite core; and

said step of inserting said at least one composite element into said head casing further comprises the step of inserting said composite core into said head casing.