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:
Dec. 22, 2009
Filed:
May. 20, 2008
Applicants:
Donald E. Krintzline, Tiffin, OH (US);
Mark W. Bordner, Attica, OH (US);
Inventors:
Donald E. Krintzline, Tiffin, OH (US);
Mark W. Bordner, Attica, OH (US);
Assignee:
National Machinery LLC, Tiffin, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D 22/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A machine, method and tooling to precision cold-form roller blanks for anti-friction bearings. The machine is a multistage progressive former using floating die cavities to enable simultaneous shaping of the ends of the roller with high accuracy and without flash. The tools and staged forming create an improved roller with an advantageous grain pattern and devoid of structural defects previously attributable to the presence of sheared end face material in the radiused corners of the blank and flash at its mid-section.