Games using tangible projectile – Golf – Club or club support
Reexamination Certificate
2005-09-06
2005-09-06
Passaniti, Sebastiano (Department: 3711)
Games using tangible projectile
Golf
Club or club support
C473S329000, C473S330000, C473S332000, C473S345000, C473S349000, C473S409000
Reexamination Certificate
active
06939248
ABSTRACT:
A wood golf club head is adapted to achieve the maximum flight distance or optimum trajectory of a golf ball, by incorporating features to achieve an appropriate correlation between launch angle and backspin speed of a golf ball that is struck by the club head. A wood golf club head is designed to achieve a launch angle and a backspin speed of a golf ball located in an angle-spinspeed region defined by an ellipse having a center point O(21, 1800), length of a major axis L equal to2100(rpm), length of a minor axis S equal to 5.7(deg), and tilt angle θ of the major axis measured in a counterclockwise direction from the vertical axis equal to 0.25(deg), wherein the horizontal coordinate designates the launch angle(deg) of the golf ball, the vertical coordinate designates the backspin speed(rpm) of the golf ball, and the horizontal and vertical axes have the same numerical scale. Preferably, the wood golf club head has a face formed of a low friction material and a loft angle of 13 to 20 degrees.
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Fujikawa Yoshihiro
Naruo Takeshi
Fasse W. F.
Fasse W. G.
Mizuno Corporation
Passaniti Sebastiano
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