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:
Mar. 20, 2012
Filed:
May. 28, 2010
Takeshi Ashino, Kobe, JP;
Takeshi Ashino, Kobe, JP;
SRI Sports Limited, Kobe-Shi, JP;
Abstract
A racket frameof the present invention includes fiber reinforced resinous layers. At least one of the fiber reinforced resinous layers is a layer (L) in which a rubber component is blended. A matrix of the layer (L) contains a rubber component. When a total weight of a matrix contained in the racket frameis defined as Wm (g) and a total weight of the rubber component contained in the frameis defined as Wg (g), a rate Rg (%) of the total weight Wg to the total weight Wm is 2.5(%) or greater and 17.5(%) or less. In this frame, a ratio [Rh/Rs] of plane rigidity Rh to throat rigidity Rs is 0.05 or greater and 0.2 or less. Preferably, the plane rigidity Rh is 30 (kgf/cm) or greater and 70 (kgf/cm) or less. Preferably, the throat rigidity Rs is 250 (kgf/cm) or greater and 800 (kgf/cm) or less.