Golf club head

• US 9,981,163 B2
• Filed: 07/22/2016
• Issued: 05/29/2018
• Est. Priority Date: 11/10/2015
• Status: Active Grant

• Current Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Original Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Inventors: Wada, Kozue, Takechi, Takaharu
• Primary Examiner(s): Passaniti, Sebastiano
• Application Number:
  US15/217,597
• Publication Number:
  US 20170128789A1
• Time in Patent Office: 676 Days
• Field of Search: 473324-350, 473287-292
• CPC Class Codes: A63B 2053/0491 with added weights, e.g. changeable, replaceable
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0433 with special sole configurations
• CPC Class Codes: A63B 53/0466 wood-type
• CPC Class Codes: A63B 60/02 Ballast means for adjusting the centre of mass A63B60/24, A63B60/54 take precedence

Abstract

A golf club head comprises two weight members, and in a reference plan view where a sole part faces upward and a hosel hole central axis extension line is vertical, a reference imaginary straight line, a first imaginary straight line and a second imaginary straight line are set. The reference imaginary straight line passes through a central axis of a hosel hole and a head gravity center is determined when weight members are not attached. The first imaginary straight line passes through the central axis of the hosel hole and a center of the first opening part. The second imaginary straight line passes through the central axis of the hosel hole and a center of the second opening part. A first angle θ₁ between the reference and first imaginary straight lines is ±10 degrees or less, and a second angle θ₂ between the reference and second imaginary straight lines is larger than the first angle θ₁.

Claims

1. A golf club head, comprising:

a head main body that includes;

a hosel hole;

a first attachment part that has a first opening part for allowing a weight member to be removably attached thereto; and

a second attachment part that has a second opening part for allowing a weight member to be removably attached thereto;

two or more of first weight members that have different weights and can each be attached to the first attachment part; and

two or more of second weight members that have different weights and can each be attached to the second attachment part, wherein

there are two or more combinations each of which includes one of the first weight members and one of the second weight members, and has the same total weight,

assuming reference plan view in which the golf club head is viewed downward from a position vertically above the golf club head under a condition where a sole part faces upward and a hosel hole central axis extension line is vertical, a reference imaginary straight line, a first imaginary straight line and a second imaginary straight line are set with respect to the reference plan view,

the reference imaginary straight line passing through a central axis of the hosel hole and a head gravity center that is determined when neither the first weight members nor the second weight members are attached to the head main body,

the first imaginary straight line passing through the central axis of the hosel hole and a center of the first opening part, and

the second imaginary straight line passing through the central axis of the hosel hole and a center of the second opening part,

a first angle θ

₁ between the reference imaginary straight line and the first imaginary straight line is ±

10 degrees or less, and

a second angle θ

₂ between the reference imaginary straight line and the second imaginary straight line is larger than the first angle θ

₁.

2. The golf club head according to claim 1, wherein the second angle θ

₂ is 50 degrees or more and 90 degrees or less.

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

a difference (e-f) between distance (e) and distance (f) is 15 mm or less, the distance (e) being defined as, in a face-back direction of the head main body, from the head gravity center to the center of the first opening part and the distance (f) being defined as, in the face-back direction, from the head gravity center to the center of the second opening part, and

a difference (g-h) between distance (g) and distance (h) is 15 mm or less, the distance (g) being defined as, in a toe-heel direction of the head main body, from the head gravity center to the center of the first opening part and the distance (h) being defined as, in the toe-heel direction, from the head gravity center to the center of the second opening part.

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

the second angle θ

₂ is 55 degrees or more and 80 degrees or less.

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

a difference (e-f) between distance (e) and distance (f) is 15 mm or less, the distance (e) being defined as, in a face-back direction of the head main body, from the head gravity center to the center of the first opening part and the distance (f) being defined as, in the face-back direction, from the head gravity center to the center of the second opening part, and

a difference (g-h) between distance (g) and distance (h) is 15 mm or less, the distance (g) being defined as, in a toe-heel direction of the head main body, from the head gravity center to the center of the first opening part and the distance (h) being defined as, in the toe-heel direction, from the head gravity center to the center of the second opening part.

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

the first angle θ

₁ is ±

5 degrees or less.

7. The golf club head according to claim 6, wherein

the first angle θ

₁ is ±

2 degrees or less.

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

each of the first and second weight members has a head part, and

a diameter of the head part of the second weight member is larger than a diameter of the head part of the first weight member.