Method for making a golf club face
First Claim
1. A face for a golf club head, the face comprising an impact surface having a geometric center, the impact surface comprising:
- a central region including the geometric center of the impact surface, wherein the central region is disc-shaped, with a radius of at least about 6 mm, and is centered at the geometric center of the impact surface;
shallow markings located entirely within the central region, the shallow markings having a first depth, the central region being free of markings having a depth greater than the first depth; and
deep markings located outside the central region, the deep markings having a second depth greater than the first depth of the shallow markings.
13 Assignments
0 Petitions
Accused Products
Abstract
An improved face for a golf club head includes shallow and deep markings configured to provide a pleasing appearance when viewed head on, and to frame the central region of the impact surface of the face when viewed at address. Use of only shallow markings in the central region of the impact surface prevents existence of stress fractures resulting from use of deep markings in the central region. This allows for a face thinner than those incorporating conventional grooves in the central regions of their impact surfaces, resulting in both superior resistance to cracking and improved C.O.R. Specified methods of manufacture are particularly suited for making clubs incorporating these shallow and deep markings.
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Citations
28 Claims
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1. A face for a golf club head, the face comprising an impact surface having a geometric center, the impact surface comprising:
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a central region including the geometric center of the impact surface, wherein the central region is disc-shaped, with a radius of at least about 6 mm, and is centered at the geometric center of the impact surface; shallow markings located entirely within the central region, the shallow markings having a first depth, the central region being free of markings having a depth greater than the first depth; and deep markings located outside the central region, the deep markings having a second depth greater than the first depth of the shallow markings. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A face for a golf club head, the face comprising an impact surface, the impact surface comprising:
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a circular central region extending from a geometric center of the impact surface, wherein the central region has a radius of about 1.5 cm; a heel region and a toe region, wherein the central region is situated between the heel region and the toe region; horizontal grooves located in the heel region and the toe region, the grooves being straight and having a depth between about 0.15 mm and about 0.50 mm and substantially constant width; horizontal shallow markings located entirely within the central region, the shallow markings being straight and having a depth between about 0.01 mm and a first depth, the first depth being at least 0.05 mm less than the depth of the grooves, the central region being free of markings or grooves having a depth greater than the first depth; and wherein the grooves are collinear with and have width substantially equal to that of the shallow markings. - View Dependent Claims (24, 25)
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26. A face for a golf club head, the face comprising an impact surface, the impact surface comprising:
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a circular central region extending from a geometric center of the impact surface, wherein the central region has a radius of about 1.5 cm and is free of deep markings having a second depth; a heel region and a toe region, wherein the central region is situated between the heel region and the toe region; horizontal shallow markings located in the central region, the shallow markings being straight and having a first depth less than the second depth; and horizontal grooves located in the heel region and the toe region, the grooves being straight and having a depth between about 0.15 mm and about 0.50 mm and substantially constant width; wherein the grooves are collinear with and have width substantially equal to that of the shallow markings; and wherein the impact surface further comprises a horizontal framing groove above the central region, the framing groove being straight and having depth of about 0.20 mm.
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27. A face for a golf club head, the face comprising an impact surface, the impact surface comprising:
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a circular central region extending from a geometric center of the impact surface, wherein the central region has a radius of about 1.5 cm and is free of deep markings having a second depth; a heel region and a toe region, wherein the central region is situated between the heel region and the toe region; horizontal shallow markings located in the central region, the shallow markings being straight and having a first depth less than the second depth; and horizontal grooves located in the heel region and the toe region, the grooves being straight and having a depth between about 0.15 mm and about 0.50 mm and substantially constant width; wherein the grooves are collinear with and have width substantially equal to that of the shallow markings; and wherein an outer shallow marking is below the center region.
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28. A face for a golf club head, the face comprising an impact surface having a geometric center, the impact surface comprising:
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a disc-shaped central region a having a radius of at least about 6 mm, centered at the geometric center of the impact surface, wherein the central region is free of deep markings; shallow markings located in the central region, the shallow markings having a first depth insufficient to impart substantial spin to a golf ball striking the markings; and deep markings located outside the central region having a second depth, the second depth of the deep markings being greater than the first depth of the shallow markings.
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Specification