Golf club head and manufacturing method for same

Patent metadata

Field	Value
Publication number	US-10792544-B2
Application number	US-201916555456-A
Country	US
Kind code	B2
Filing date	Aug 29, 2019
Priority date	Jan 18, 2013
Publication date	Oct 6, 2020
Grant date	Oct 6, 2020

Abstract

A golf club head includes a heel portion, a toe portion, a hosel, and a striking face. The striking face includes a plurality of scorelines each having an average depth no less than about 0.10 mm, a plurality of micro-grooves each having an average depth no greater than about 0.010 mm, and a plurality of textured surface treatment regions superimposed on the micro-grooves so as to at least partially intersect the micro-grooves.

First claim

What is claimed is:

1. A method comprising:
(a) mechanically milling a striking face of a golf club head having a central region and a toe region thereby forming a plurality of generally parallel arcuate grooves that extend at least partially into the toe region;
(b) forming a plurality of scorelines in the striking face, the scorelines extending horizontally and comprising an average scoreline width, a scoreline heel-ward extent that is coincident with a central region heel-ward extent, and a scoreline toe-ward extent that is coincident with a central region toe-ward extent; and
(c) forming by material removal a plurality of horizontally-oriented lines at least in the central region interspersed between, and spaced from, the plurality of scorelines, the plurality of horizontally-oriented lines having an average line width less than the average scoreline width.

2. The method of claim 1 , further comprising, subsequent to step (a) and prior to step (c), applying a media blast to a portion of the striking face.

3. The method of claim 1 , wherein the step (c) comprises forming the horizontally-oriented lines as to be substantially confined to the central region.

4. The method of claim 1 , wherein the step (c) further comprises forming the plurality of horizontally-oriented lines by mechanical milling.

5. The method of claim 1 , wherein the step (c) comprises forming the horizontally-oriented lines at a concentration of no less than 2 lines between each adjacently-located pair of scorelines of the plurality of scorelines.

6. The method of claim 5 , wherein the concentration is equal to 4 lines between each adjacently-located pair of scorelines of the plurality of scorelines.

7. The method of claim 1 , wherein the arcuate grooves cover a majority of the toe region of the striking face.

8. The method of claim 1 , wherein step (c) further comprises forming the horizontally-oriented lines to exhibit a generally U-shaped cross-section.

9. The method of claim 1 , wherein the golf club head comprises a loft no less than 35°.

10. The method of claim 1 , further comprising finishing the striking face to exhibit an average surface roughness Ra of between 120 μin and 170 μin.

11. The method of claim 1 , further comprising, subsequent to step (a) and prior to step (c), polishing a portion of the striking face.

12. A method comprising:
(a) mechanically milling a striking face of a golf club head having a central region and a toe region thereby forming a plurality of generally parallel arcuate grooves that extend at least partially into the toe region;
(b) subsequent to step (a), selectively smoothing the striking face to form a sharp vertical boundary of the plurality of arcuate grooves;
(c) forming a plurality of scorelines in the striking face, the scorelines extending horizontally and comprising an average scoreline width, a scoreline heel-ward extent that is coincident with a central region heel-ward extent, and a scoreline toe-ward extent that is coincident with a central region toe-ward extent; and
(d) forming by material removal a plurality of horizontally-oriented lines at least in the central region interspersed between, and spaced from, the plurality of scorelines, the plurality of horizontally-oriented lines having an average line width less than the average scoreline width.

13. The method of claim 12 , further comprising, subsequent to step (a) and prior to step (c), applying a media blast to a portion of the striking face.

14. The method of claim 12 , wherein the step (c) comprises forming the horizontally-oriented lines as to be substantially confined to the central region.

15. The method of claim 12 , wherein the step (c) further comprises forming the plurality of horizontally-oriented lines by mechanical milling.

16. The method of claim 12 , wherein the step (c) comprises forming the horizontally-oriented lines at a concentration of no less than 2 lines between each adjacently-located pair of scorelines of the plurality of scorelines.

17. The method of claim 16 , wherein the concentration is equal to 4 lines between each adjacently-located pair of scorelines of the plurality of scorelines.

18. The method of claim 12 , wherein the arcuate grooves cover a majority of the toe region of the striking face.

19. The method of claim 12 , wherein step (c) further comprises forming the horizontally-oriented lines to exhibit a generally U-shaped cross-section.

20. The method of claim 12 , wherein the golf club head comprises a loft no less than 35°.

Assignees

• Sumitomo Rubber Ind

Inventors

• Aguayo Roberto
• Brunski Jeffrey D
• Daraskavich Matthew R
• Park Sharon J

Classifications

• B23K26/0006 Primary

  taking account of the properties of the material involved (B23K26/32, B23K26/40 take precedence) · CPC title

• B23K26/0093

  combined with mechanical machining or metal-working covered by other subclasses than B23K · CPC title

• B23K2103/04

  Steel {or steel} alloys · CPC title

• B23K2103/02

  Iron or ferrous alloys · CPC title

• B23K2101/34

  Coated articles {; Surface treated articles} · CPC title