GOLF CLUB HEAD

• US 20170333766A1
• Filed: 04/14/2017
• Published: 11/23/2017
• Est. Priority Date: 05/19/2016
• Status: Active Application

• Current Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Original Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Inventors: BAN, Wataru
• Granted Patent: US 10,252,120 B2
• Time in Patent Office: Days
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0445 Details of grooves or the like on the impact surface
• CPC Class Codes: A63B 53/0466 wood-type

Abstract

A wood type golf club head includes a face portion, a crown portion, and a sole portion. The face portion includes an impact area, a toe-side area on a toe side with respect to the impact area, and a heel-side area on the heel side with respect to the impact area. At least one groove is formed in the toe-side area and/or the heel-side area. The depth of the groove is 0.025 mm (inclusive) to 0.508 mm (inclusive). A groove area occupancy in the toe-side area is different from a groove area occupancy in the heel-side area.

Claims

1. A wood type golf club head comprising a face portion, a crown portion, and a sole portion,

wherein the face portion includes an impact area, a toe-side area on a toe side with respect to the impact area, and a heel-side area on a heel side with respect to the impact area,

at least one groove is formed in the toe-side area and/or the heel-side area,

a depth of the groove is 0.025 mm (inclusive) to 0.508 mm (inclusive), and

a groove area occupancy in the toe-side area is different from a groove area occupancy in the heel-side area.

2. The golf club head according to claim 1, wherein a plurality of first grooves as the at least one groove are formed in the toe-side area,

a plurality of second grooves as the at least one groove are formed in the heel-side area,

a shortest distance between adjacent first grooves is less than three times a width of the first groove, and

a shortest distance between adjacent second grooves is less than three times a width of the second groove.

3. The golf club head according to claim 1, wherein a groove corresponding to the groove is not formed in the impact area.

4. The golf club head according to claim 1, wherein a plurality of first grooves as the at least one groove are formed in the toe-side area,

a plurality of second grooves as the at least one groove are formed in the heel-side area, and

the number of the first grooves and the number of the second grooves are different from each other, whereby a groove area occupancy in the toe-side area is different from a groove area occupancy in the heel-side area.

5. The golf club head according to claim 1, wherein a plurality of first grooves as the at least one groove are formed in the toe-side area,

a plurality of second grooves as the at least one groove are formed in the heel-side area, and

a pitch of adjacent first grooves and a pitch of adjacent second grooves are different from each other, whereby a groove area occupancy in the toe-side area is different from a groove area occupancy in the heel-side area.

6. A wood type golf club head comprising a face portion, a crown portion, and a sole portion, wherein

the face portion includes an impact area, a toe-side area on a toe side with respect to the impact area, and a heel-side area on a heel side with respect to the impact area,

a plurality of grooves are formed in the toe-side area and/or the heel-side area,

a depth of each groove of the plurality of grooves is 0.025 mm (inclusive) to 0.508 mm (inclusive), and

a shortest distance between adjacent grooves of the plurality of grooves is less than 1.905 mm.