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:
Jun. 01, 1999
Filed:
Feb. 19, 1997
NGK Insulators, Ltd., , JP;
Abstract
A securing method including the steps of inserting a core into a depression portion of a metal member having an open end portion, and connecting the metal member to the core by compressing circumferentially the core and metal member by means of a compression die is disclosed. The improvement includes a step of compressing circumferentially the core and metal member in such a manner that an overall compression portion to be compressed by means of the compression die is divided into a plurality of compression regions arranged from the open end portion of the metal member to the other end portion, and a compression pressure is applied to the compression regions successively from the open end portion to the other end portion