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Golf-club provided with a club-head having surfaces configured to be covered by air vortex flows

  • US 9,975,010 B2
  • Filed: 06/01/2016
  • Issued: 05/22/2018
  • Est. Priority Date: 04/28/2016
  • Status: Active Grant
First Claim
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1. A golf-club comprising:

  • a club-head including a face at which the club-head is arranged to collide in a first direction with a golf ball, a sole, and a ridge structure being on a surface of the sole,the ridge structure including a plurality of first ridges and a plurality of second ridges arranged at an interval, and a U shaped ridge from which the plurality of first ridges and the plurality of second ridges extend outwardly,the plurality of first ridges extending parallel to the first direction and the plurality of second ridges extending in a second direction perpendicular to the first direction,the interval being larger than a width of each of the plurality of the first ridges.

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