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:
Nov. 29, 2005
Filed:
Jun. 05, 2002
Jaak Stefaan Van Den Sype, Dobbs Ferry, NY (US);
Alan Russell Barlow, Ridgefield, CT (US);
Edison Viotto, São Paulo, BR;
Jaak Stefaan Van den Sype, Dobbs Ferry, NY (US);
Alan Russell Barlow, Ridgefield, CT (US);
Edison Viotto, São Paulo, BR;
Praxair Technology, Inc., Danbury, CT (US);
Abstract
This invention is directed to a process and apparatus for producing high productivity carburizing. A process is introduced that uses a gas mixture made up of CO, H, CO, HO, CHand N, such that the product of the % CO and % His greater than about 1600; the ratio of CO/COis greater than 10; and the ratio of H/HO is greater than about 10. The gas mixture is controlled for a short time. A reactor for generating a gas mixture for carburizing steel is also introduced. This reactor is composed of a cylindrically symmetric body; a first central tube containing electrical heating elements for gas flow; a second central tube concentrically disposed around the first central tube; and a plurality of catalyst beds disposed in an annular space in a segmented fashion around the second central tube.