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:
Mar. 19, 2013
Filed:
Nov. 02, 2006
Ronald R. Akers, Guntersville, AL (US);
Robert John Madeira, Commerce Township, MI (US);
Gary M. Campbell, Albertville, AL (US);
Dennis Mckinney, Boaz, AL (US);
Richard Mckelvey, Albertville, AL (US);
Ronald R. Akers, Guntersville, AL (US);
Robert John Madeira, Commerce Township, MI (US);
Gary M. Campbell, Albertville, AL (US);
Dennis McKinney, Boaz, AL (US);
Richard McKelvey, Albertville, AL (US);
Ajax Tocco Magnethermic Corporation, Warren, OH (US);
Abstract
An apparatus and method for hardening the concentric main bearing surfaces and orbital pin bearing surfaces of a crankshaft for an internal combustion engine. The apparatus includes an inductor that is connected to a high frequency power source with a power controller to cause the power source to direct a given power to the inductor at given rotational heating positions of the crankshaft. A master controller creates output signals to control the power controller. The apparatus and method includes a first multi-surface hardening station with inductors for all of the main bearing surfaces, a second multi-surface hardening station with inductors for some of the orbital pins and a third multi-surface hardening station with inductors for the remaining orbital pins. Total indicator run out (TIR) is measured after the first station to adjust the heating process in the third station to produce a straight crankshaft.