Games using tangible projectile – Golf – Club or club support
Reexamination Certificate
2011-01-04
2011-01-04
Hunter, Alvin A (Department: 3711)
Games using tangible projectile
Golf
Club or club support
C473S348000, C473S349000
Reexamination Certificate
active
07862453
ABSTRACT:
The invention prevents a resin member from being broken so as to improve durability. The invention provides a golf club head (1) in which at least a part of a crown portion (4) forming an upper surface of the head is formed by a resin member (FR) made of a fiber reinforced resin in which a fiber is oriented in a matrix resin. The resin member (FR) includes a one-way fiber reinforced resin layer in which the fiber is oriented in one direction, and a fiber intersection lamination portion which is laminated so as to differentiate a direction of the fiber. At least two one-way fiber reinforced resin layers which are adjacent in a thickness direction are intersected at an angle of 30 to 130 degrees of the fiber. Further, a compressive strength of the fiber of the one-way fiber reinforced resin layer which is arranged in an innermost side in the fiber intersection lamination portion is set to be equal to or more than 1.3 GPa.
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Kouno Masaru
Kumamoto Tomio
Birch & Stewart Kolasch & Birch, LLP
Hunter Alvin A
SRI Sports Limited
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