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. 07, 1987
Filed:
Apr. 16, 1985
Tadashi Dohnomoto, Toyota, JP;
Yoshitaka Takahashi, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
This composite material is composed essentially of a matrix metal which is copper or an alloy thereof, and a reinforcing fiber material which is a collection of alumina - silica type short fibers in which the included amount of alumina is about 40% by weight or more, with the total amount of non fibrous particles included in the collection of fibers being less than or equal to about 7% by weight, with the total amount of non fibrous particles with diameter greater than or equal to about 150 microns included in the collection of fibers being less than or equal to about 1% by weight, and with the volume proportion of the short fiber material being from about 0.5% to about 30%. Optionally and preferably, this volume proportion of short fiber material is from about 1.0% to about 25%, or from about 0.5% to about 10%, or even better from about 1.0% to about 5%. And the total amount of non fibrous particles can be less than or equal to about 4% by weight; and the total amount of non fibrous particles with diameter greater than or equal to about 150 microns can be less than or equal to about 0.6% by weight. The reinforcing fiber material can be fibers containing a substantial amount of silica, or alternatively can be a fiber material substantially made only of alumina; and may contain a substantial amount of, or consist substantially only of, alpha alumina. The matrix material may be pure copper, brass, or bronze.