Golf club heads with optimized characteristics and related methods

Patent metadata

Field	Value
Publication number	US-10080933-B2
Application number	US-201715413684-A
Country	US
Kind code	B2
Filing date	Jan 24, 2017
Priority date	Mar 14, 2013
Publication date	Sep 25, 2018
Grant date	Sep 25, 2018

Abstract

Embodiments of golf club heads comprising a head interior and a hosel structure, the head interior bounded by a head front portion, a head rear portion, a head heel portion, a head toe portion, a head top portion, and a head sole portion, the golf club heads further comprising various optimized characteristics, including optimizing the head center of gravity height and depth in relation to the head volume and mass, are presented herein. Other examples and related methods are also disclosed herein.

First claim

The invention claimed is:

1. A golf club head comprising:
a head body comprising:
a head front portion; a head rear portion;
a head heel portion; a head toe portion;
a head sole portion; a head top portion; and
a hosel structure having a bore for receiving a golf club shaft, the bore having a hosel axis;

a strikeface at the head front portion and comprising a face height and a strikeface centerpoint, the face height being between 33 mm and 71 mm and the strikeface centerpoint positioned at a midpoint of the face height;
a head volume measured in cc's and comprising a head volume magnitude greater than 420 cc;
a head center of gravity;
a first optimization characteristic; and
a second optimization characteristic;
wherein:
when the golf club head is at an address position over a ground plane:
a head vertical axis extends through the head center of gravity and is orthogonal to the ground plane; and
a head horizontal axis extends through the head center of gravity, and is orthogonal to the head vertical axis;
a loft plane of the golf club head is tangent to the strikeface centerpoint;
a front plane of the golf club head extends through the strikeface centerpoint, parallel to the hosel axis, and orthogonal to the ground plane;
a head depth plane extends through the strikeface centerpoint, parallel to the head horizontal axis and perpendicular to the loft plane;
a horizontal MOI is defined as the moment of inertia about the head horizontal axis;
a hosel MOI is defined as the moment of inertia about the hosel axis, the hosel MOI is greater than approximately 2800 g·cm 2 ;
a CG height axis extends through the head center of gravity and intersects the head depth plane perpendicularly at a first intersection point;
a head CG height of the head center of gravity is measured, along the CG height axis, between the head center of gravity and the first intersection point;
a head CG depth of the head center of gravity is measured, parallel to the ground plane and orthogonal to the front plane, between:
a second intersection point located at an intersection between the front plane and the ground plane; and
a third intersection point located at an intersection between the head vertical axis and the ground plane;

an absolute value of the head CG height is less than or equal to approximately 5.08 mm;
the head CG depth is approximately 41 mm to approximately 102 mm;
the first optimization characteristic is defined by (a) the head volume magnitude added to (b) a ratio between the head CG depth divided by the absolute value of the head CG height;
wherein

the first optimization characteristic is greater than or equal to 425 cc; and
the second optimization characteristic is defined by (a) the horizontal MOI being greater than or equal to 39% off the hosel MOI.

2. The golf club head of claim 1 , wherein:
the hosel structure further comprises a hosel diameter, the hosel diameter being greater than approximately 0.50 inch.

3. The golf club head of claim 1 , wherein:
the head CG depth is greater than approximately 45 mm.

4. The golf club head of claim 1 , wherein:
when the golf club head is at an address position over the ground plane:
a top plane of the golf club head extends through the strikeface centerpoint, parallel to the ground plane;
a head CG upper limit of the head center of gravity is measured, along the head vertical axis, between a fourth intersection point located at an intersection between the head vertical axis and the top plane; and
the head center of gravity; and

the head CG upper limit is less than approximately −8 mm.

5. The golf club head of claim 1 , wherein:
the head body further comprises one or more weight members distributed towards the head sole portion; and
the one or more weight members comprise an adhesive material disposed on an inner surface of the head sole portion.

6. The golf club head of claim 5 , wherein each of the one or more weight members comprises at least one of:
a mass of approximately 2 grams to approximately 50 grams; and
a volume of approximately 1 cc to approximately 30 cc.

7. The golf club head of claim 1 , wherein:
the head body further comprises one or more weight members distributed towards the head sole portion;
the one or more weight members comprise a mixture of an adhesive material and a metal powder; and
the one or more weight members are disposed on an inner surface of the head sole portion.

8. The golf club head of claim 1 , wherein:
the head body further comprises one or more weight members distributed towards the head sole portion;
the one or more weight members comprise one or more mass elements disposed within one or more volumes of adhesive material, the one or more mass elements being adhered to an inner surface of the head sole portion by the adhesive material.

9. The golf club head of claim 1 , wherein:
the head body comprises a driver-type body; and
the head center of gravity is located between the head depth plane and the head sole portion.

10. A golf club head comprising:
a head body comprising:
a head front portion; a head rear portion;
a head heel portion; a head toe portion;
a head sole portion; a head top portion;
a hosel structure having a bore for receiving a golf club shaft, the bore having a hosel axis; and
a face portion at the head front portion comprising:
a strikeface centerpoint;
a strikeface perimeter; and
a face height bounded by the strikeface perimeter, the strikeface centerpoint being positioned at a midpoint of the face height;

a head center of gravity; and
at least one of:
a first optimization characteristic;
a second optimization characteristic; and
a third optimization characteristic;

wherein:
when the golf club head is at an address position over a ground plane:
a head vertical axis extends through the head center of gravity and is orthogonal to the ground plane; and
a head horizontal axis extends through the head center of gravity, and is orthogonal to the head vertical axis;
a loft plane of the golf club head is tangent to the strikeface centerpoint;
a front plane of the golf club head extends through the strikeface centerpoint, parallel to the hosel axis, and orthogonal to the ground plane;
a head depth plane extends through the strikeface centerpoint, parallel to the head horizontal axis and perpendicular to the loft plane;
a horizontal MOI is defined as the moment of inertia about the head horizontal axis;
a hosel MOI is defined as the moment of inertia about the hosel axis, the hosel MOI is greater than approximately 2800 g·cm 2 ;
a CG height axis extends through the head center of gravity and intersects the head depth plane perpendicularly at a first intersection point;
a head CG height of the head center of gravity is measured, along the CG height axis, between the head center of gravity and the first intersection point;
a head CG depth of the head center of gravity is measured, parallel to the ground plane and orthogonal to the front plane, between:
a second intersection point located at an intersection between the front plane and the ground plane; and
a third intersection point located at an intersection between the head vertical axis and the ground plane;

the head CG depth is approximately 41 mm to approximately 102 mm;
the face height is approximately 33 mm to approximately 71 mm, measured parallel to the loft plane;
the first optimization characteristic comprises:
an absolute value of the head CG height being less than or equal to approximately 5.08 mm;

the second optimization characteristic comprises:
a CG performance ratio of less than or equal to 0.56, as defined by (a) 76.2 mm minus the face h

Assignees

• Karsten Mfg Corp

Inventors

• Stokke Ryan M
• Schweigert Bradley D

Classifications

• A63B2053/0433

  Human Necessities · mapped topic

• A63B53/02

  Joint structures between the head and the shaft · CPC title

• A63B2053/0412

  Human Necessities · mapped topic

• A63B53/0466 Primary

  wood-type · CPC title

• A63B2053/0491

  with added weights, e.g. changeable, replaceable · CPC title