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. 12, 1999
Filed:
Sep. 23, 1997
Glenn Mark Krcek, Sterling Heights, MI (US);
Bruce Steven Shimanovski, Southfield, MI (US);
Sanjay Mahasukhlal Shah, Rochester Hills, MI (US);
George Thomas Winterhalter, Sr, Berkley, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A method for cutting an 'O' ring retention groove around the cutting edge of a hydropiercing die button. A groove machining tool is given a convex curved end surface the radius of which is slightly less than or, at most, substantially equal to the tightest concave radius that the end surface will have to sweep through as the groove is cut. Consequently, an accurate, slightly curved groove bottom surface is created for the 'O' ring, while the machining tool will not bind as it moves through the tightest concave portion of the cutting path.