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:
Apr. 09, 2019
Filed:
Apr. 27, 2016
Sumitomo Rubber Industries, Ltd., Kobe-shi, Hyogo, JP;
Gifu University, Gifu-shi, Gifu, JP;
Takehiko Hyodo, Kobe, JP;
Yumi Kanemitsu, Kobe, JP;
Asami Nakai, Gifu, JP;
Akio Ohtani, Gifu, JP;
Tadashi Uozumi, Gifu, JP;
SUMITOMO RUBBER INDUSTRIES, LTD., Kobe-Shi, Hyogo, JP;
GIFU UNIVERSITY, Gifu-Shi, Gifu, JP;
Abstract
To provide a lightweight shaft having excellent strength, a shaft has one or a plurality of fiber reinforced resin layers. At least one of the fiber reinforced resin layers is produced by a filament winding method in which one or a plurality of fiber bundles are wound while tension is applied thereto. The fiber bundles each include a plurality of filaments. The tension applied to the fiber bundles is not less than 0.04 (gf) per filament. The tension is great. Preferably, at least one of the fiber reinforced resin layers is produced by a multi-filament winding method in which a plurality of the fiber bundles are simultaneously wound while being arranged side by side. Preferably, fibers forming the filaments are carbon fibers. Preferably, a resin composition included in each fiber reinforced resin layer is an epoxy resin composition.