Golf club head

• US 8,961,335 B2
• Filed: 02/15/2013
• Issued: 02/24/2015
• Est. Priority Date: 02/16/2012
• Status: Active Grant

• Current Assignee: Sumitomo Rubber Industries Limited
• Original Assignee: Dunlop Sports Co. Ltd. (Sumitomo Rubber Industries Limited)
• Inventors: Sugimoto, Yasushi
• Primary Examiner(s): BLAU, STEPHEN LUTHER
• Application Number:
  US13/768,194
• Publication Number:
  US 20130217514A1
• Time in Patent Office: 739 Days
• Field of Search: 473345-346, 473/332, 473/339, 473/348
• US Class Current: 473/332
• CPC Class Codes: A63B 2209/00 Characteristics of used materials
• CPC Class Codes: A63B 2209/02 with reinforcing fibres, e.g. carbon, polyamide fibres
• CPC Class Codes: A63B 53/042 the face insert consisting of a material different from that of the head
• CPC Class Codes: A63B 53/0433 with special sole configurations
• CPC Class Codes: A63B 53/0437 with special crown configurations
• CPC Class Codes: A63B 53/0466 wood-type
• CPC Class Codes: A63B 60/002 Resonance frequency related characteristics

Abstract

A hollow golf club head comprises a face portion with a face for hitting a ball on its front and a crown portion forming a top surface of the head, wherein the head comprises a face member including the face portion and made of a metallic material and a crown member attached to the face member to form the crown portion at least partially, the crown member includes a first member made of a metal material and a second member made of a fiber reinforced resin for supporting the first member so that the first member does not directly contact with the face member, the head has a primary natural frequency of from 3800 to 6500 Hz and an antinode when the head vibrates in the primary natural mode appears in the first member.

Claims

1. A hollow golf club head comprising

a face portion having a face for hitting a golf ball on its front and a crown portion forming a top surface of the head, wherein

the head comprises a face member including the face portion and made of a metallic material and a crown member attached to the face member to form the crown portion at least partially,

the crown member includes a first member made of a metal material and a second member made of a fiber reinforced resin for supporting the first member so that the first member does not directly contact with the face member,

the head has a primary natural frequency in a range of from 3800 to 6500 Hz and

an anti node when the head vibrates in the primary natural mode appears in the first member.

2. The head according to claim 1, wherein

the second member comprises a first opening in which the first member is disposed and a first periphery annularly extending so as to surround the first opening.

3. The head according to claim 1, wherein

the second member has a plate shape.

4. The head according to claim 1, wherein

the head is a wood type golf club head.