Golf club and method of manufacture

• US 5,527,034 A
• Filed: 11/30/1993
• Issued: 06/18/1996
• Est. Priority Date: 11/30/1993
• Status: Expired due to Fees

• Current Assignee: Danny Ashcraft
• Original Assignee: Goldwin Golf U.S.A., Inc.
• Inventors: De La Cruz, Richard, Ashcraft, Danny C., Parente, Richard E.
• Primary Examiner(s): Grieb, William H.
• Application Number:
  US08/159,738
• Time in Patent Office: 931 Days
• Field of Search: 273/167 R, 273/167 A, 273/167 F, 273/167 G, 273/167 H, 273/167 K, 273/169, 273/172, 273/173, 273/174, 273/175, 273/80.4, 29/DIG. 18
• US Class Current: 473/330
• CPC Class Codes: A63B 2209/00 Characteristics of used materials
• CPC Class Codes: A63B 53/02 Joint structures between the head and the shaft
• CPC Class Codes: A63B 53/04 Heads
• CPC Class Codes: A63B 53/0466 wood-type
• CPC Class Codes: A63B 60/00 Details or accessories of golf clubs, bats, rackets or the like
• CPC Class Codes: A63B 60/02 Ballast means for adjusting the centre of mass A63B60/24, A63B60/54 take precedence
• CPC Class Codes: B27M 3/22 of sport articles, e.g. bowling pins, frames of tennis rackets, skis, paddles
• CPC Class Codes: Y10T 29/49799 Providing transitory integral holding or handling portion
• CPC Class Codes: Y10T 29/49861 Sizing mating parts during final positional association
• CPC Class Codes: Y10T 29/49996 Successive distinct removal operations

Abstract

A golf club head of the metal wood type has a body formed entirely from one billet of high strength aluminum alloy with a separate sole plate of the same or different material secured in a machined recess on the lower face of the body. The body has an internal, empty cavity machined through a lower wall of the body, and the walls are thicker than in conventional cast stainless steel metalwoods. The front, striking face is machined to any selected bulge and roll, loft and face angle.

Claims

1. A golf club head, comprising:

a forged aluminum alloy body having a striking face, an upper wall, a lower wall, and a peripheral skirt between the upper and lower walls; and

the body having an internal surface forming an internal cavity, whereby the internal cavity is milled out to provide selected head dimensions, a selected weight distribution about the club head, and a selected center of gravity position rearward from the striking face.

2. The head as claimed in claims 1, wherein the internal surface of the body is a milled surface.

3. The head as claimed in claim 2, wherein the body has at least some milled outer surfaces.

4. The head as claimed in claim 3, wherein the striking face of the body is a milled surface having a selected bulge and roll.

5. The head as claimed in claim 1, wherein the internal cavity has an opening in the lower wall of the body and a separate sole plate is secured across the cavity opening.

6. The head as claimed in claim 5, wherein the opening is of smaller dimensions than the maximum cross-sectional dimensions of said cavity.

7. The head as claimed in claim 5, wherein the lower wall of the body has a machined recess having a forward edge spaced rearwardly from said striking face and said sole plate is secured in said recess and has a front face flush with the forward edge of said recess and spaced rearwardly from said striking face.

8. The head as claimed in claim 1, wherein the internal cavity has an undercut.

9. A golf club head, comprising:

a forged aluminum alloy body having a striking face, a rear wall, an upper wall, a lower wall, a heel and a toe; and

the body having an internal surface forming an internal cavity, whereby the internal cavity is milled out to provide selected dimensions and weight distribution about the club head.

10. The head as claimed in claim 9, wherein the body is formed in one piece.

11. The head as claimed in claim 9, wherein the lower wall has an opening communicating with said internal cavity and a sole plate is secured across said opening.

12. The head as claimed in claim 11, wherein the cavity has an undercut at said opening.

13. The head as claimed in claim 11, wherein the lower wall has a recess extending from said rear wall over said opening and towards said front striking face and having a forward edge spaced rearwardly from said front striking face, and said sole plate is secured in said recess, said sole plate terminating short of said front striking face.

14. The head as claimed in claim 9, wherein said front, striking face has a wall thickness of more than 0.125 inches.

15. A golf club head, comprising:

a forged aluminum alloy body having a striking face, an upper wall, a lower wall, a rear wall, a heel and a toe;

the body having an internal hollow cavity having an inner surface portion spaced from said heel to provide a predetermined solid mass of material at said heel;

the heel having a bore extending inwardly from the upper wall at a predetermined angle, said bore having an inner closed end in said solid mass of material short of said cavity inner surface portion, the inner end of the bore being spaced from said cavity and said lower wall; and

a separate hosel tube secured in said bore, whereby the internal cavity is machined out to provide predetermined dimensions and predetermined weight distribution about said club head.

16. The golf club head as claimed in claim 15, wherein said hosel tube projects upwardly out of said bore a predetermined distance to provide a hosel for receiving a golf club shaft.

17. A wood-type golf club head, comprising:

a forged aluminum alloy body having a striking face, an upper wall, a lower wall, and a skirt between the upper and lower walls;

the club head characterized by a cavity, the cavity having an internal surface; and

means for providing the club head with selected weight distribution, the means located on the internal surface of the internal cavity.

18. The golf club head of claim 17, wherein the selected weight distribution means further provides a selected center of gravity position rearward from the striking face.

19. The club head of claim 17, wherein the striking face of the body has a selected bulge and roll.

20. The club head of claim 17, wherein the internal cavity has an opening in the lower wall of the body.

21. The club head of claim 20 further comprising a sole plate secured across the cavity opening.

22. The club head of claim 20, wherein the dimension of the opening is smaller than the maximum cross-sectional dimension of the cavity.

23. The club head of claim 22, wherein the lower wall of the body has a recess having a forward edge spaced rearwardly from the striking face and the sole plate is secured in the recess and has a front face flush with the forward edge of the recess and spaced rearwardly from the striking face.

24. The head as claimed in claim 17, wherein the internal cavity has an undercut.