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. 02, 1996
Filed:
Jun. 01, 1994
Takao Nakagawa, Kawaguchi, JP;
Masaharu Tachibana, Kawaguchi, JP;
Mihoko Yamashita, Kawaguchi, JP;
Yasuo Nozaki, Kawaguchi, JP;
Toshihiro Sato, Kawaguchi, JP;
Across Co., Ltd., Kawaguchi, JP;
Abstract
A spring member made of a carbon fibers/carbon composite material in which carbon fibers are dispersed in a matrix of graphite, and a process for producing such a spring member. The process includes the steps of: (a) forming raw preformed yarns; (b) shaping the raw preformed yarns in a form of a yarn member, a taper member or a sheet member; (c) coiling the thus shaped member around a core rod together with a coiling spacer; (d) molding the coiled member by hot pressing at about 300.degree. C.-2000.degree. C. under a given pressurized pressure; and graphitizing the coiled member at 1500.degree. C.-3000.degree. C., after carbonizing at 700.degree.-1200.degree.C. if necessary.