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US 7,611,423 B2Granted
Golf club head
AssigneeBridgestone Sports Co., Ltd.
InventorsHideo Matsunaga, Wataru Ban, Hideo Shimazaki
Life of this patent
Estimating the term…
Abstract
This invention provides a golf club head having a first viscoelastic body made of a first viscoelastic material and a second viscoelastic body made of a second viscoelastic material with a loss coefficient the temperature dependence of which is different from that of a loss coefficient of the first viscoelastic material.
Claims9
An iron type golf club head comprising:
- a head main body;
- a face plate fixed to a front surface side of said head main body to form a face surface;
- a cavity portion formed in said head main body, said cavity portion open to the front surface side;
- and
- a plurality of viscoelastic bodies disposed within said cavity portion,
- wherein said plurality of viscoelastic bodies are made of viscoelastic materials with loss coefficients the temperature dependences of which are different,
- wherein said plurality of viscoelastic bodies are arranged along a rear surface of said face plate, and
- wherein each viscoelastic body is in tight contact with the rear surface of said face plate.
5 more elements
An iron type golf club head comprising:
- a head main body;
- a face plate fixed to a front surface side of said head main body to form a face surface;
- a cavity portion formed in said head main body, said cavity portion open to the front surface side;
- a first viscoelastic body disposed within said cavity portion;
- and
- a second viscoelastic body disposed within said cavity portion,
- wherein said first and second viscoelastic bodies are made of viscoelastic materials with loss coefficients the temperature dependences of which are different,
- wherein said second viscoelastic body includes a portion covering a circumferential surface of said first viscoelastic body, and
- wherein said first viscoelastic body and said portion of said second viscoelastic body are in tight contact with a rear surface of said face plate.
6 more elements
Dependencies are inferred from the claim text.