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:
Nov. 09, 1993
Filed:
Feb. 21, 1992
Applicant:
Inventors:
Yukihito Ichikawa, Nagoya, JP;
Koji Fushimi, Gifu, JP;
Assignee:
NGK Insulators, Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ; F16C / ;
U.S. Cl.
CPC ...
384 26 ; 219 8624 ; 219 93 ; 3849071 ;
Abstract
A ceramic guide pin having a guide portion, wherein at least the guide portion has a surface so shaped, microscopically, that top portions of outwardly projected portions of the surface are in the shape of gently curved surfaces. The ceramic guide pin can be produced by a process which comprises the steps of preparing a shaped body of a ceramic guide pin by forming or machining in dimensions calculated from the desired finished dimensions and a firing shrinkage allowance factor, sintering said shaped body, and subjecting the sintered body to barrel polishing.