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. 14, 1992
Filed:
Aug. 18, 1989
Applicant:
Inventor:
Fumio Kagawa, Shiojiri, JP;
Assignees:
Showa Denko K.K., Tokyo, JP;
Tanken Seiko K.K., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16J / ; C01B / ; C04B / ;
U.S. Cl.
CPC ...
277 96 ; 277 962 ; 277D / ; 423345 ; 501 81 ; 501 88 ;
Abstract
A silicon carbide sintered body for a mechanical seal which has independent pores having an average pore diameter of from 10 to 40 .mu.m and a porosity of from 4 to 13 vol %. The mechanical seal includes a stationary sliding ring and a rotary sliding ring, with at least one of the rings being the silicon carbide sintered body. The silicon carbide sintered body is preferably made of .alpha.-silicon carbide powder.