Golf club head

• US 10,252,120 B2
• Filed: 04/14/2017
• Issued: 04/09/2019
• Est. Priority Date: 05/19/2016
• Status: Active Grant

• Current Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Original Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Inventors: Ban, Wataru
• Primary Examiner(s): Hunter, Alvin A
• Application Number:
  US15/487,704
• Publication Number:
  US 20170333766A1
• Time in Patent Office: 725 Days
• Field of Search: 473324-350
• 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 striking face, a crown portion, and a sole portion,

wherein the striking face 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),

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

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.

2. The golf club head according to claim 1, wherein

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

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

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

4. The golf club head according to claim 1, wherein

the plurality of first grooves are straight grooves extending in a toe-heel direction and are parallel to each other, and

the plurality of second grooves are straight grooves extending in the toe-heel direction and are parallel to each other.

5. The golf club head according to claim 1, wherein

the plurality of first grooves are formed as concentric arcs and their arrangement direction is in a toe-heel direction, and

the plurality of second grooves are formed as concentric arcs and their arrangement direction is in the toe-heel direction.

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

wherein the striking face 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),

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

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.

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

the striking face 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.