The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 09, 2014
Filed:
Feb. 21, 2013
K.k. Endo Seisakusho, Tsubame, JP;
Junichi Amano, Tsubame, JP;
Toru Tamaki, Tsubame, JP;
K.K. Endo Seisakusho, Niigata, JP;
Abstract
There is provided a golf club head capable of reliably preventing a backspin rate from varying in rainfall. A plurality of fine grooves are formed on a face surface. When observing a cross-sectional surface perpendicular to the face surfaceinvolving a vertical line passing through the center G of gravity of the golf club headwith the golf club headset at preset loft and lie angles, an average width of the fine groovesin the cross-sectional surface is 100 μm or less and an average pitch thereof in the cross-sectional surface is 100 μm or less. Hence, the discharge of water can be accelerated by a capillary phenomenon, making it possible to reliably prevent a backspin rate of a golf ball from varying in rainfall.