Multi-piece solid golf ball

Details Multi-piece solid golf ball Multi-piece solid golf ball

1999-07-14

2001-02-20

Chapman, Jeanette (Department: 3711)

Games using tangible projectile

Golf

Ball

C473S374000

Reexamination Certificate

active

06190269

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a multi-piece solid golf ball. More particularly, it relates to a multi-piece solid golf ball having soft and good shot feel when hit at not only high club head speed but also low club head speed, and having excellent flight performance by exhibiting a high launch angle and a low amount of spin.
BACKGROUND OF THE INVENTION
Many types of golf balls are commercially selling and are typically classified into solid golf balls such as a two-piece golf ball, three-piece golf ball a and the like, and thread wound golf balls. Recently, the two-piece golf ball and three-piece golf ball been designed to attain a long flight distance, while maintaining soft and good shot feel at the time of hitting in comparison to the conventional thread golf ball. Therefore, the two-piece solid golf ball and three-piece golf ball are generally approved of or employed by many golfers. The three-piece golf ball, when compared with the two-piece golf ball, has better shot feel while maintaining excellent flight performance, because the three-piece golf ball can include a broader hardness distribution. The three-piece golf ball has soft and good shot feel when hit by a driver, but has hard and poor shot feel when hit at low club head speed, such as when hit by a putter.
OBJECTS OF THE INVENTION
A main object of the present invention is to provide a multi-piece solid golf ball having soft and good shot feel when hit at not only high club head speed but also low club head speed, and excellent flight performance by attaining a high launch angle and low amount of spin.
According to the present invention, the object described above has been accomplished by adjusting the contact area with a club face of a golf club and a ratio of spin amount to launch angle (spin amount/launch angle) when hit by a No. 1 wood club at a head speed of 40 m/second, and a ratio of spin amount/launch angle when hit by a No. 5 iron club at a head speed of 34 m/second to specified ranges, thereby providing a multi-piece solid golf ball having soft and good shot feel when hit at not only high head speed but also low head speed, and excellent flight performances.
This object as well as other objects and advantages of the present invention will become apparent to those skilled in the art from the following description with reference to the accompanying drawings.


REFERENCES:
patent: 5255922 (1993-10-01), Proudfit
patent: 5304608 (1994-04-01), Yabuki et al.
patent: 5607366 (1997-03-01), Yokota et al.
patent: 5733205 (1998-03-01), Higuchi et al.

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