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. 06, 2004
Filed:
Mar. 29, 2001
Takashi Matsumoto, Kagawa, JP;
Toshiomi Fukuda, Kagawa, JP;
Shin-ichi Ozaki, Kagawa, JP;
Yuji Takimoto, Kagawa, JP;
Toyo Tanso Co., Ltd., Osaka, JP;
Abstract
A mechanical seal member formed by applying slurry, in which boron carbide powder and silicon powder are mixed and dispersed onto the entire surface of a carbon material having an average pore radius of at least 1.0 &mgr;m and formed into a hollow tubular or cylindrical product shape and firing the resultant product to form a carbon-silicon carbide composite material extending from the entire surface toward the interior of the product shape and a thin coating, 3 to 30 &mgr;m thick, consisting mainly of silicon carbide and boron carbide and spread on the surface of the composite material. The carbon-silicon carbide composite material is formed uniformly from the surface to the center, because the member is small in size with a section, parallel to the center axis, of up to 7×7 mm. A siliconization ratio on the surface of the composite material is 30 to 55% in area ratio. A carbon base material density is at least 1.7 g/cm and after siliconization 2.0 to 2.5 g/cm . A mechanical seal member may be produced by impregnating metal or resin into pores of this carbon-silicon composite material.