Golf ball

• US 5,143,377 A
• Filed: 08/02/1991
• Issued: 09/01/1992
• Est. Priority Date: 02/04/1991
• Status: Expired due to Term

• Current Assignee: SRI Sports Limited (Sumitomo Rubber Industries Limited)
• Original Assignee: Sumitomo Rubber Industries Limited
• Inventors: Ohshima, Shinji, Oka, Kengo
• Primary Examiner(s): Grieb, William H.
• Assistant Examiner(s): Wong, Steven B.
• Application Number:
  US07/739,458
• Time in Patent Office: 396 Days
• Field of Search: 273/232, 273/62, 273/233, 40/327
• US Class Current: 473/383
• CPC Class Codes: A63B 37/0004 Surface depressions or protrusions
• CPC Class Codes: A63B 37/00065 located around the pole or the equator
• CPC Class Codes: A63B 37/0009 Polygonal
• CPC Class Codes: A63B 37/0026 Balata
• CPC Class Codes: A63B 37/0052 Liquid cores
• CPC Class Codes: A63B 37/0096 Spin rate

Abstract

A golf ball having circular dimples and noncircular dimples arranged in different percentages depending on the spherical zones, whereby a favorable aerodynamic property is obtained by eliminating the difference in trajectories between line hitting and face hitting.

Claims

1. A golf ball having dimples on the surface thereof and at least one great circle path which does not intersect the dimples in a spherical zone defined by said great circle to each circumference formed in correspondence with a central angle of less than approximately 15°

with respect to said great circle, represented as an (L) spherical zone and a spherical zone other than said (L) spherical zone represented as an (F) spherical zone, whereby noncircular dimples are arranged in said (L) spherical zone in an amount more than 60% of all dimples arranged in said (L) spherical zone and circular dimples are arranged in said (F) spherical zone in an amount more than 60% of all dimples arranged in said (F) spherical zone.

2. The golf ball as claimed in claim 1, wherein the surface configuration of each of said noncircular dimples is a regular polygonal.

3. The golf ball of claim 1, wherein only noncircular dimples are arranged in the (L) zone while circular dimples are arranged more than noncircular dimples in the (F) zone.