Golf club head

Patent metadata

Field	Value
Publication number	US-12246226-B2
Application number	US-202217902437-A
Country	US
Kind code	B2
Filing date	Sep 2, 2022
Priority date	Sep 3, 2021
Publication date	Mar 11, 2025
Grant date	Mar 11, 2025

Abstract

A state of a head placed such that its shaft axis is vertical to a horizontal plane and a face normal line is parallel to a perpendicular plane on which the shaft axis lies is defined as a 0-degree state. A direction parallel to the perpendicular plane and parallel to the horizontal plane is defined as a projection direction. A projected area of the head projected in the projection direction when the head is rotated by θ° about the shaft axis toward a back side from the 0-degree state is denoted by WAθ. WAθ is divided by the shaft axis into an area Afθ and an area Abθ. Airflow causes a force acting on the area Afθ in a face-closing direction and a force acting on the area Abθ in a face-opening direction. (Af 90 −Ab 90 ) is −4500 (mm 2 ) or less. (Af 15 −Ab 15 ) is 4700 (mm 2 ) or less.

First claim

What is claimed is:

1. A right-handed golf club head comprising:
a face portion that forms a striking face;
a crown portion that forms a crown outer surface;
a sole portion that forms a sole outer surface;
a hosel portion that is configured to receive a shaft and that defines a shaft axis line, and
a protruding portion disposed on an outer surface of the golf club head, wherein
the striking face has a face center, and a normal line at the face center,
the golf club head has a head width in a face-back direction of greater than or equal to 100 mm,
the golf club head has a head length in a toe-heel direction of greater than or equal to 110 mm,
a state of the golf club head placed in such a manner that the shaft axis line is vertical to a horizontal plane and the normal line is parallel to a first perpendicular plane on which the shaft axis line lies is defined as a 0-degree state,
a direction that is parallel to the first perpendicular plane and is parallel to the horizontal plane is defined as a projection direction,
a projected area of the golf club head projected in the projection direction when the golf club head is rotated by θ° about the shaft axis line toward a back side from the 0-degree state is denoted by WAθ (mm 2 ), θ ranging from 0 to 90,
the projected area is divided by the shaft axis line into two regions,
of the two regions, a left-side region is defined as a first region, and a right-side region is defined as a second region,
an area of the first region is denoted by Afθ (mm 2 ),
an area of the second region is denoted by Abθ (mm 2 ),
a difference (Afθ−Abθ) is denoted by Sθ (mm 2 ),
S 90 is less than or equal to −4500 (mm 2 ),
S 15 is less than or equal to 4700 (mm 2 ), and
the protruding portion increases Ab 90 and does not increase Af 15 .

2. A golf club head comprising:
a face portion that forms a striking face;
a crown portion that forms a crown outer surface;
a sole portion that forms a sole outer surface;
a hosel portion that is configured to receive a shaft and that defines a shaft axis line, and
a protruding portion disposed on an outer surface of the golf club head,

wherein
the striking face has a face center, and a normal line at the face center,
the golf club head has a head width in a face-back direction of greater than or equal to 100 mm,
the golf club head has a head length in a toe-heel direction of greater than or equal to 110 mm,
a state of the golf club head placed in such a manner that the shaft axis line is vertical to a horizontal plane and the normal line is parallel to a first perpendicular plane on which the shaft axis line lies is defined as a 0-degree state,
a direction that is parallel to the first perpendicular plane and is parallel to the horizontal plane is defined as a projection direction,
a projected area of the golf club head projected in the projection direction when the golf club head is rotated by θ° about the shaft axis line toward a back side from the 0-degree state is denoted by WAθ (mm 2 ), θ ranging from 0 to 90,
the projected area is divided by the shaft axis line into two regions,
of the two regions, a region to which a force acting in such a direction that the striking face is opened is applied due to air resistance during downswing is defined as a first region, and a region to which a force acting in such a direction that the striking face is closed is applied due to the air resistance is defined as a second region,
an area of the first region is denoted by Afθ (mm 2 ),
an area of the second region is denoted by Abθ (mm 2 ),
a difference (Afθ−Abθ) is denoted by Sθ (mm 2 ),
a ratio ((S 90 |/|S 15 |) is greater than or equal to 1.00,
where |S 90 | means an absolute value of S 90 , and |S 15 | means an absolute value of S 15 , and
the protruding portion increases Ab 90 and does not increase Af 15 .

3. The golf club head according to claim 1 , wherein a value of θ at which Sθ is zero is less than or equal to 55°.

4. The golf club head according to claim 1 , wherein a value of θ at which a ratio (WAθ/Abθ) is 2.0 is less than or equal to 55°.

5. The golf club head according to claim 1 , wherein (S 15 −S 0 )/15 is greater than −35 (mm 2 /deg).

6. The golf club head according to claim 1 , having a head volume of greater than or equal to 400 cm 3 .

7. The golf club head according to claim 1 , having a face progression of greater than or equal to 13 mm and less than or equal to 23 mm, wherein
the face progression is a length from the shaft axis line to a frontmost point of the golf club head and is measured in the face-back direction.

8. The golf club head according to claim 1 , wherein the protruding portion is provided on the crown outer surface.

9. The golf club head according to claim 2 , wherein a value of θ at which Sθ is zero is less than or equal to 55°.

10. The golf club head according to claim 2 , wherein a value of θ at which a ratio (WAθ/Abθ) is 2.0 is less than or equal to 55°.

11. The golf club head according to claim 2 , wherein (S 15 −S 0 )/15 is greater than −35 (mm 2 /deg).

12. The golf club head according to claim 2 , wherein the protruding portion is provided on the crown outer surface.

Assignees

• Sumitomo Rubber Ind

Inventors

• Mizutani Naruhiro
• KOHNO Daisuke
• Nakamura Hirotaka
• Kodaka Jun

Classifications

• A63B2209/023

  Long, oriented fibres, e.g. wound filaments, woven fabrics, mats · CPC title

• A63B53/0466

  wood-type · CPC title

• A63B53/0437

  with special crown configurations · CPC title

• A63B53/0412 Primary

  Volume · CPC title

• A63B53/0408 Primary

  characterised by specific dimensions, e.g. thickness · CPC title