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:
Sep. 01, 1987
Filed:
Nov. 12, 1985
Applicant:
Inventors:
Shigenori Murate, Aichi, JP;
Yoshinori Hattori, Aichi, JP;
Assignee:
NGK Spark Plug Co., Ltd., Aichi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B24B / ;
U.S. Cl.
CPC ...
51317 ; 51-7 ; 51 19 ;
Abstract
A method of improving the impact resistance of a ceramic turbine rotor by rotating the rotor in a number of abrasive grindstones such that the edges of the rotor are rounded to a radius in the range of about 0.2 to 1 mm.