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US 10,207,161 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.
Claims14
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 between 12 degrees and 35 degrees;
- 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 club head experiences a drag force FD when subjected to an air speed of 98 mph in a direction perpendicular to a plane extending through the geometric center of the strikeface, parallel to the hosel axis, and positioned at 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 the sum of the crown-to-sole moment of inertia and the heel to toe moment of inertia Ixx+Iyy;
- and
- the club head satisfies relation A and one or more of relations B and C:
- A
- .
-
- F
- D
- +
- 0.3
- 0.0002
-
- (
- I
- xx
- +
- I
- yy
- )
- <
- 1
- B
- .
-
- F
- D
- <
- 1.0
-
-
- lbf
- C
- .
-
- I
- xx
- +
- I
- yy
- >
- 5000
-
-
- g
- ·
- cm
- 2
- .
51 more elements
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 between 12 degrees and 35 degrees;
- 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 club head experiences a drag force FD when subjected to an air speed of 98 mph in a direction perpendicular to a plane extending through the geometric center of the strikeface, parallel to the hosel axis, and positioned at 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 the sum of the crown-to-sole moment of inertia and the heel to toe moment of inertia Ixx+Iyy;
- and
- the club head satisfies relation A and one or more of relations B and C:
- A
- .
-
- F
- D
- +
- 1.65
- 2
-
- (
- head
-
-
- CG
-
-
- depth
- )
- <
- 1
- B
- .
-
- F
- D
- <
- 1.0
-
-
- lbf
- C
- .
-
- head
-
-
- CG
-
-
- depth
- >
- 1.0
-
-
- inches
- .
51 more elements
Dependencies are inferred from the claim text.