Title:
ボール
Document Type and Number:
Japanese Patent JP5427030
Kind Code:
B2
Abstract:
A ball includes a ball body having a spherical surface, and at least one projection extending from the surface of the ball body. The projection extends in such a manner that the projection forcibly separates a laminar boundary layer generated on the surface of the ball body, and transitions the laminar boundary layer to a turbulent boundary layer.
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| JPS5877766 | 【考案の名称】球具 |
Inventors:
Shinichiro Ito
Kazuya Seo
Takeshi Asai
Norihiro Yugi
Kazuya Seo
Takeshi Asai
Norihiro Yugi
Application Number:
JP2009511658A
Publication Date:
February 26, 2014
Filing Date:
April 10, 2008
Export Citation:
Assignee:
Morten Co., Ltd.
International Classes:
A63B41/00
Domestic Patent References:
| JP2005537034A | 2005-12-08 | |||
| JP2003513767A | 2003-04-15 | |||
| JPS61127764U | 1986-08-11 |
Attorney, Agent or Firm:
Keiko Marubayashi
Keisuke Marubayashi
Keisuke Marubayashi