Golf ball

Details Golf ball Golf ball

2007-05-29

2007-05-29

Trimiew, Raeann (Department: 3711)

Games using tangible projectile

Golf

Ball

Reexamination Certificate

active

11293277

ABSTRACT:
Two-tiered dimples8of a golf ball have a first recessed part X and a second recessed part Y. The first recessed part X substantially forms a part of a spherical shape. The first recessed part X includes a first opening14,a side wall curved face16and a flat face18.The second recessed part Y is substantially a regular quadrangular pyramid. This second recessed part Y includes a second opening20,a slope22and a bottom face24.The second opening20is a regular tetragon. The first recessed part X improves aerodynamic symmetry of the golf ball. The second recessed part Y improves a dimple effect. Proportion of the number of the two-tiered dimples8to total number of the dimples is equal to or greater than 70%.

REFERENCES:
patent: 5338039 (1994-08-01), Oka et al.
patent: 5470076 (1995-11-01), Cadorniga
patent: 6709349 (2004-03-01), Sullivan
patent: 7041013 (2006-05-01), Ohama et al.
patent: 7094162 (2006-08-01), Sajima
patent: 2004/0152541 (2004-08-01), Sajima
patent: 2003-290392 (2003-10-01), None

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