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:
May. 29, 1984
Filed:
Feb. 19, 1982
Applicant:
Inventor:
James A Repella, Southfield, MI (US);
Assignee:
Microdot Inc., Darien, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23D / ; B21D / ; B21D / ;
U.S. Cl.
CPC ...
29417 ; 29511 ; 2914 / ;
Abstract
The disclosure relates to a method of manufacturing an oil seal element from polytetrafluoroethylene and the like. A tubular billet having concentric inner and outer cylindrical surfaces is faced off at one end. An arcuate slit is cut in the end face of the billet at each of a plurality of angularly spaced positions. Indexing of the billet is synchronized with rotation of the slitting tool. A disk of desired thickness having arcuate slits on one of its faces is then sliced from the billet, thereby also facing the billet for the next slitting sequence.