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. 04, 2005
Filed:
Sep. 06, 2002
Hiroyasu Abe, Hamamatsu, JP;
Masayuki Kato, Iwata-gun, JP;
Yasumasa Shimizu, Hamamatsu, JP;
Yasuyuki Semba, Hamamatsu, JP;
Hiroyasu Abe, Hamamatsu, JP;
Masayuki Kato, Iwata-gun, JP;
Yasumasa Shimizu, Hamamatsu, JP;
Yasuyuki Semba, Hamamatsu, JP;
Yamaha Corporation, Shizuoka-ken, JP;
Abstract
A prescribed number of bars are arranged in a percussion instrument such as a xylophone and marimba, wherein each bar is formed by a base layer, a fiber reinforced plastic layer, and a surface layer that are combined together using an epoxy adhesive therebetween. Both the base layer and surface layer is made of the prescribed hardwood material such as rosewood, hard birch, padauk, and Chinese quince, while the fiber reinforced plastic layer is formed by laminating one or more fiber reinforced plastic sheets, each of which is formed by impregnating and hardening thermosetting epoxy resin with fibers. All fibers can be aligned in a single direction slanted to the longitudinal direction of the bar. Alternatively, fibers are woven in two directions rectangularly crossing each other in a cloth form. Thus, it is possible to improve bars in striking durability as well as in sound quality and design.