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. 13, 1995
Filed:
Nov. 18, 1993
Applicant:
Inventor:
Robert P DeTorre, White Oak, PA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23D / ; B23D / ;
U.S. Cl.
CPC ...
83500 ; 83675 ; 83676 ; 83694 ; 30350 ; 30357 ;
Abstract
Blades with tungsten carbide cutting edges have a surface at a relief angle and a surface at a reverse angle at the periphery. A smooth crown is provided at the intersection of the surfaces. The crown will contact and be included within an overlap of a cooperating offset steel blade. The relief angle may be between about 1 and 3 degrees and the reverse angle about 1/4 to 1 degree. The crown may have a finish of about 2-6 micro-inches. The contact between the blades during operation provides a polishing or self-sharpening effect. The tungsten carbide blades are used in rotating shear wheel devices and scissor cutting devices to cut tire cord fabric.