IP Library Granted Patent US 8,516,675
Granted Patent B2
US 8,516,675 · App. 13/024,122 · Granted Aug 27, 2013

Method of forming a golf club head with improved aerodynamic characteristics

Inventors: D. Clayton Evans (San Marcos, CA); Evan D. Gibbs (Encinitas, CA); Matthew T. Cackett (San Diego, CA); Steven M. Ehlers (Poway, CA)
Assignee: Callaway Golf Company
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Quick Facts
Patent No.
US 8,516,675
App. No.
13/024,122
Granted
Aug 27, 2013
Kind
B2
Abstract

A method for forming a driver type golf club head, the method comprising orienting a golf club head using a largest tangent circle method, forming a golf club head having an apex point positioned in a crown apex zone and designing a crown curve having some portion exist above a 5.25 inch radius arc, the radius arc beginning at the apex point and extending rearward toward the back end of the golf club head.

Claims (25)

1. A method for forming a driver type golf club head, the method comprising:

orienting a golf club head using a largest tangent circle method, wherein the largest tangent circle method comprises placing a club head into a Cartesian Coordinate System (CCS) comprising a X axis comprising a +X axis and a −X axis, a Y axis comprising a +Y axis and a −Y axis, and a Z axis comprising a +Z axis and a −Z axis, wherein three perpendicular planes exists, the three perpendicular planes being XY, YZ and XZ, and the three perpendicular planes intersecting at an origin point; the club head comprising a body, a hosel, a crown a sole and a face;

orienting a hosel axis line of the club head in the YZ plane passing through the origin point;

orienting the club head with the hosel axis line at an angle equal to a designed lie angle in relation to the −Y axis rotating around the +Z axis;

orienting the club head by pivoting the club head around the hosel axis line until a point on the sole is tangent to a plane parallel with the XY plane that has a greatest intersection point value on the Z axis;

viewing the club head along the X axis and projecting a crown silhouette curve and a sole silhouette curve onto a measurement plane which is parallel to the YZ plane;

placing a circle on the measurement plane between the projected crown silhouette curve and the projected sole silhouette curve, enlarging the circle until the circle has a maximum diameter;

creating a tangent line from a tangent point where the circle touches the projected crown silhouette curve to a tangent point where the circle touches the projected sole silhouette;

forming a golf club head having an apex point positioned in a crown apex zone; and

designing a crown curve having some portion exist above a 5.25 inch radius arc, the radius arc beginning at the apex point and extending rearward toward a back end of the golf club head.

2. The method according to claim 1 wherein the driver type golf club head has a volume of less than 400 cubic centimeters.

3. The method according to claim 1 wherein the body is composed of a stainless steel material.

4. The method according to claim 1 wherein the sole is composed of a metal material and the crown is composed of a non-metal material.

5. The method according to claim 1 wherein the body is composed of a titanium alloy material.

6. A method for forming a driver type golf club head, the method comprising:

orienting a golf club head using a largest tangent circle method, wherein the largest tangent circle method comprises a club head into a Cartesian Coordinate System (CCS) comprising a X axis comprising a +X axis and a −X axis, a Y axis comprising a +Y axis and a −Y axis, and a Z axis comprising a +Z axis and a −Z axis, wherein three perpendicular planes exists, the three perpendicular planes being XY, YZ and XZ, and the three perpendicular planes intersecting at an origin point; the club head comprising a body, a hosel, a crown, a sole and a face;

orienting a hosel axis line of the club head in the YZ plane passing through the origin point;

orienting the club head with the hosel axis line at an angle equal to a designed lie angle in relation to the −Y axis rotating around the +Z axis;

orienting the club head by pivoting the club head around the hosel axis line until a point on the sole is tangent to a plane parallel with the XY plane that has a greatest intersection point value on the Z axis;

viewing the club head along the X axis and projecting a crown silhouette curve and a sole silhouette curve onto a measurement plane which is parallel to the YZ plane;

placing a circle on the measurement plane between the projected crown silhouette curve and the projected sole silhouette curve, enlarging the circle until the circle has a maximum diameter;

creating a tangent line from a tangent point where the circle touches the projected crown silhouette curve to a tangent point where the circle touches the projected sole silhouette;

forming a golf club head having an apex point positioned in a crown apex zone;

the golf club head having a volume of approximately 400 cubic centimeters; and

designing a crown curve having some portion exist above a 5.25 inch radius arc, the radius arc beginning at the apex point and extending rearward toward a back end of the golf club head.

Assignments (8)
RELEASE OF SECURITY INTEREST AT REEL/FRAME 063665/0176 Recorded Jun 1, 2026
From: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
To: CALLAWAY GOLF COMPANY (F/K/A TOPGOLF CALLAWAY BRANDS CORP.); TRAVISMATHEW, LLC; OGIO INTERNATIONAL, INC.; WORLD GOLF TOUR, LLC
Reel/Frame 075834/0150 →
SECURITY INTEREST Recorded May 17, 2023
From: TOPGOLF CALLAWAY BRANDS CORP.; OGIO INTERNATIONAL, INC.; TOPGOLF INTERNATIONAL, INC.; TRAVISMATHEW, LLC; WORLD GOLF TOUR, LLC
To: BANK OF AMERICA, N.A.
Reel/Frame 063692/0009 →
SECURITY AGREEMENT Recorded May 16, 2023
From: TOPGOLF CALLAWAY BRANDS CORP. (FORMERLY CALLAWAY GOLF COMPANY); OGIO INTERNATIONAL, INC.; TOPGOLF INTERNATIONAL, INC.; TRAVISMATHEW, LLC; WORLD GOLF TOUR, LLC
To: BANK OF AMERICA, N.A, AS COLLATERAL AGENT
Reel/Frame 063665/0176 →
RELEASE (REEL 048172 / FRAME 0001) Recorded Mar 17, 2023
From: BANK OF AMERICA, N.A.
To: TOPGOLF CALLAWAY BRANDS CORP. (F/K/A CALLAWAY GOLF COMPANY); OGIO INTERNATIONAL, INC.
Reel/Frame 063622/0187 →
SECURITY INTEREST Recorded Jan 23, 2019
From: CALLAWAY GOLF COMPANY; CALLAWAY GOLF SALES COMPANY; CALLAWAY GOLF BALL OPERATIONS, INC.; OGIO INTERNATIONAL, INC.; CALLAWAY GOLF INTERACTIVE, INC.; CALLAWAY GOLF INTERNATIONAL SALES COMPANY; TRAVISMATHEW, LLC
To: BANK OF AMERICA, N.A.
Reel/Frame 048110/0352 →
SECURITY AGREEMENT Recorded Jan 4, 2019
From: CALLAWAY GOLF COMPANY; OGIO INTERNATIONAL, INC.
To: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 048172/0001 →
SECURITY INTEREST Recorded Feb 16, 2018
From: CALLAWAY GOLF COMPANY; CALLAWAY GOLF SALES COMPANY; CALLAWAY GOLF BALL OPERATIONS, INC.; OGIO INTERNATIONAL, INC.; CALLAWAY GOLF INTERACTIVE, INC.; CALLAWAY GOLF INTERNATIONAL SALES COMPANY
To: BANK OF AMERICA, N.A.
Reel/Frame 045350/0741 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 9, 2011
From: EVANS, D. CLAYTON; GIBBS, EVAN D.; CACKETT, MATTHEW T.; EHLERS, STEVEN M.
To: CALLAWAY GOLF COMPANY
Reel/Frame 025794/0345 →
Continuity (2)
Provisional Application 61303178 · Feb 10, 2010
Related Publication 20110192002A1 · Aug 11, 2011