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US 11,957,964 B2Granted
Club head having balanced impact and swing performance characteristics
AssigneeKarsten Manufacturing Corporation
InventorsRyan M. Stokke, Sina Ghods
Life of this patent
Estimating the term…
Abstract
Described herein are embodiments of golf club heads having a balance of the following parameters: a low and back club head center of gravity position, a high moment of inertia, and low aerodynamic drag. Methods of manufacturing the embodiments of golf club heads having a balance of club head center of gravity position, moment of inertia, and aerodynamic drag are also described herein.
Claims26
A hollow body golf club head comprising:
- a body having a front end, a back end opposite the front end, a crown, a sole
- opposite the crown, a heel, a toe opposite the heel, a skirt adjoining the crown and the sole, and a hosel structure having a hosel axis extending centrally through a bore in the hosel structure;
- a strikeface positioned at the front end and defining a geometric center, a loft
- plane tangent to the geometric center, and a head depth plane extending through the geometric center from the heel to the toe, perpendicular to the loft plane;
- wherein:
- a loft angle of the club head is less than 16 degrees;
- a front radius of curvature of the club head is between 0.18 and 0.4 inches;
- a head center of gravity of the club head is located at a head CG depth
- from the loft plane, measured in a direction perpendicular to the loft plane, and at a head CG height from a head depth plane, measured in a direction perpendicular to the head depth plane;
- the head CG depth is greater than 1.4 inches;
- and
- the club head experiences a drag force (FD) less than 1.4 lbf when subjected to an air speed of 102 mph in a direction perpendicular to a plane extending through the geometric center of the strikeface, parallel to the hosel axis, and positioned at an angle corresponding to the loft angle from the loft plane;
- the club head has a crown-to-sole moment of inertia Ixx, a heel-to-toe
- moment of inertia Iyy, and a combined moment of inertia measured as a sum of the crown-to-sole moment of inertia and the heel to toe moment of inertia Ixx+Iyy;
- wherein the heel-to-toe moment of inertia Iyy is greater than 5000 g cm{circumflex over ( )}2;
- wherein the club head further satisfies relation A:
- F
- D
- +
- 2.7
- 0.0005
- (
- I
- xx
- +
- I
- yy
- )
- <
- 1
- A
- .
- the club head further comprising an embedded weight comprising a weight center positioned at one or more of the following locations:
- (a) within 0.4 inch of a perimeter of the club head;
- (b) greater than 2.3 inches from the head center of gravity;
- or
- (c) greater than 4.1 inches from the geometric center of the strikeface.
34 more elements
Dependencies are inferred from the claim text.