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:
Jan. 31, 2012
Filed:
Aug. 21, 2008
Applicant:
Kensuke Tanaka, Saitama, JP;
Inventor:
Kensuke Tanaka, Saitama, JP;
Assignee:
Yonex Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A63B 67/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
A shuttlecock including a cap and a skirt part whereto an air passage hole is formed, wherein a rib is provided to the skirt part, adjacent to a rear end of the air passage hole in a generatrix direction of the skirt part, the rib having a shape wherein air pressure difference is generated between an air flow passing through the air passage hole to flow on an inside of the rib and an air flow not passing through the air passage hole but to flow on an outside of the rib, and an aerodynamic force directed from the inside of the rib to the outside is generated.