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:
Dec. 15, 2015
Filed:
Feb. 27, 2012
Ryohei Shigematsu, Yokohama, JP;
Miho Nakazono, Yokohama, JP;
Ryohei Shigematsu, Yokohama, JP;
Miho Nakazono, Yokohama, JP;
NHK SPRING CO., LTD., Yokohama, JP;
Abstract
A fiber reinforced plastic spring is provided, in which broken pieces can be prevented from being scattered when breaking without using any additional member and variation in load when breaking can be reduced. FRP spring has a layered structure having basic unit consisting of a positive direction orientating layer and a negative direction orientating layer. By appropriately setting an absolute value of orientating angles of each layer, fibers in the positive direction orientating layer and the negative direction orientating layer can be entangled mutually, and thus, the spring as a whole exhibits pseudo-ductility in a breakage condition. Elastic modulus and strength available for use as a spring can be obtained and breaking at a resin portion between fibers can be prevented in each layer.