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:
Apr. 17, 2007
Filed:
Oct. 31, 2005
Ralph P. Poor, Toledo, OH (US);
Gary W. Barbee, Rossford, OH (US);
Stephen H. Verhoff, Monclova, OH (US);
James E. Brug, Toledo, OH (US);
Ralph P. Poor, Toledo, OH (US);
Gary W. Barbee, Rossford, OH (US);
Stephen H. Verhoff, Monclova, OH (US);
James E. Brug, Toledo, OH (US);
Surface Combustion, Inc., Maumee, OH (US);
Abstract
Vacuum carburizing of ferrous workpieces is performed at low pressure in a vacuum furnace using a carburizing hydrocarbon as the carburizing medium. The furnace is constructed to be generally transparent to the carburizing hydrocarbon so that cracking tends to occur at the workpiece which functions as a catalyst to minimize carbon deposits. The carburizing hydrocarbon is supplied in liquid form to an injector which injects the liquid carburizing hydrocarbon as a vapor to produce a uniform dispersion of the carburizing hydrocarbon about the workpiece, resulting in uniform carburizing of the workpieces.