Multiple-material golf club head with scarf joint
First Claim
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1. A golf club head comprising:
- a hollow body comprising a hosel, a striking face, a face extension, a bond flange extending away from the face extension, a sole, a rear flange extending away from the sole at an angle less than 90°
, and an upper opening; and
a composite crown,wherein the composite crown is affixed to the body with an adhesive to close the upper opening,wherein the face extension comprises a first front-to-back width,wherein the bond flange comprises a front region, a back region, and a second front-to-back width,wherein the front region does not comprise any convex or concave curvature,wherein the crown comprises a scarf region with a first average thickness, a transition region with a second average thickness, and a rear region with a first constant thickness,wherein the scarf region comprises a tapered edge,wherein the transition region comprises a rounded, convex curvature and a third front-to-back width,wherein each of the first and third front-to-back widths is greater than the second front-to-back width,wherein the second average thickness is greater than the first average thickness,wherein the second average thickness is greater than the first constant thickness,wherein the back region has a second constant thickness,and wherein the second constant thickness is greater than the first constant thickness.
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Abstract
A multiple-material golf club head with an improved scarf joint between the crown and the body is disclosed herein. The golf club preferably is a driver that has a metal body comprising a striking face, a sole, a return portion, a front flange, and a rear flange, and a composite crown having a scarf joint region, a transitional thickness region directly behind the scarf joint region, and a constant thickness region directly behind the transitional thickness region. The thickness distribution along the crown, in combination with the tapered edge of the scarf joint and its intersection with the front flange, greatly reduces the stress placed on critical portions of the club head and improves overall golf club head durability.
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Citations
20 Claims
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1. A golf club head comprising:
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a hollow body comprising a hosel, a striking face, a face extension, a bond flange extending away from the face extension, a sole, a rear flange extending away from the sole at an angle less than 90°
, and an upper opening; anda composite crown, wherein the composite crown is affixed to the body with an adhesive to close the upper opening, wherein the face extension comprises a first front-to-back width, wherein the bond flange comprises a front region, a back region, and a second front-to-back width, wherein the front region does not comprise any convex or concave curvature, wherein the crown comprises a scarf region with a first average thickness, a transition region with a second average thickness, and a rear region with a first constant thickness, wherein the scarf region comprises a tapered edge, wherein the transition region comprises a rounded, convex curvature and a third front-to-back width, wherein each of the first and third front-to-back widths is greater than the second front-to-back width, wherein the second average thickness is greater than the first average thickness, wherein the second average thickness is greater than the first constant thickness, wherein the back region has a second constant thickness, and wherein the second constant thickness is greater than the first constant thickness. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A driver-type golf club head comprising:
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a hollow metal body comprising a hosel, a striking face, a face extension, a bond flange extending away from the face extension, a sole, a rear flange extending away from an edge of the sole at an angle less than 90°
, and an upper opening; anda composite crown, wherein the face extension has a front-to-back width of at least 0.200 inch, wherein the bond flange has a front-to-back width of 0.100 to 0.400 inch and does not comprise any convex or concave curvature, wherein the crown is affixed to the body with an adhesive to close the upper opening, wherein the crown covers the entirety of the rear flange, wherein the crown comprises a scarf region with a first average thickness, a transition region with a second average thickness, and a rear region with a first constant thickness, wherein the transition region comprises a smoothly rounded bulge, wherein the second average thickness is greater than the first average thickness, wherein the second average thickness is greater than the first constant thickness, wherein the first constant thickness is no less than 0.020 inch and no more than 0.040 inch, wherein the scarf region comprises a tapered edge, wherein the scarf region increases in thickness from the tapered edge to the transition region, wherein the transition region comprises a maximum thickness area proximate the scarf region, and wherein the transition region has a front-to-back width of at least 0.500 inch. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification
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Current AssigneeCallaway Golf Company (Topgolf Callaway Brands Corp.)
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Original AssigneeCallaway Golf Company (Topgolf Callaway Brands Corp.)
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InventorsWatson, William C., Dawson, Patrick, DeMille, Brandon D., Rice, Bradley C.
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Primary Examiner(s)Passaniti, Sebastiano
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Application NumberUS15/062,698Time in Patent Office470 DaysField of Search473324-350, 473287-292US Class CurrentCPC Class CodesA63B 2209/00 Characteristics of used mat...A63B 53/0408 characterised by specific d...A63B 53/0466 wood-typeA63B 60/00 Details or accessories of g...
