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. 03, 1996
Filed:
Nov. 10, 1994
Yoshiyuki Yasutomi, Mito, JP;
Motoyuki Miyata, Hitachi, JP;
Shigeru Kikuchi, Naka-machi, JP;
Yukio Saito, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
To provide diagnosis of service life and maintenance requirements, a sintered ceramic body which in use is subjected to stress and undergoes change with time as a result of the stress is provided with an electrically conductive element in contact with the sintered ceramic material The element has a measurable electrical resistance which increases in dependence on the change of the ceramic body. This permits information to be obtained about said change of said body. Measuring means for the electrical resistance is connected to the conductive element. The electrically conductive element as seen in cross-section, may comprise a bundle of elongate members such as fibers or whiskers.