Wood-type golf club head

• US 20070049400A1
• Filed: 07/31/2006
• Published: 03/01/2007
• Est. Priority Date: 08/23/2005
• Status: Active Grant

• Current Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Original Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Inventors: Matsunaga, Hideo, Shimazaki, Hideo, Imamoto, Yasunori
• Granted Patent: US 7,749,101 B2
• Time in Patent Office: Days
• US Class Current: 473/329
• CPC Class Codes: A63B 2053/0491 with added weights, e.g. changeable, replaceable
• CPC Class Codes: A63B 2209/00 Characteristics of used materials
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0412 Volume
• 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 wood-type golf club head includes a metal sole portion, an elastic body and a weight member. At least one recess is defined in the metal sole portion to extend in a front-rear direction over at least half-length of a front-rear length of the sole portion. The elastic body is embedded in the recess. The weight member is fixed to the recess to cover the elastic body. The weight member is flush with the sole portion. A total area of the recess is in a range of 10% to 60% of that of the sole portion.

Claims

1. A wood-type golf club head comprising:

a metal sole portion;

an elastic body; and

a weight member, wherein;

at least one recess is defined in the metal sole portion to extend in a front-rear direction over at least half length of a front-rear length of the sole portion,

the elastic body is embedded in the recess,

the weight member is fixed to the recess to cover the elastic body,

the weight member is flush with the sole portion, and

a total area of the recess is in a range of 10% to 60% of that of the sole portion.

2. The wood-type golf club head according to claim 1, wherein:

the weight member is made of a tungsten alloy, and

weight member is press-fitted into the recess.

3. The wood-type golf club head according to claim 1, wherein:

a step portion is formed above a bottom portion of the recess,

the weight member abuts against the step portion, and

the elastic body is embedded on a deep side of the step portion.

4. The wood-type golf club head according to claim 1, further comprising:

a crown portion having a thickness in a range of 0.4 mm to 0.6 mm.

5. The wood-type golf club head according to claim 1, wherein:

the sole portion includes a stainless steel, and

the weight member has a specific gravity in a range of 9 to 12.