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:
May. 15, 2007
Filed:
Dec. 18, 2002
Todd A. Trudeau, Menominee, MI (US);
Daniel W. Bancroft, Menominee, MI (US);
Cong Yue Qiao, Menominee, MI (US);
Douglas W. Dooley, Menominee, MI (US);
Todd A. Trudeau, Menominee, MI (US);
Daniel W. Bancroft, Menominee, MI (US);
Cong Yue Qiao, Menominee, MI (US);
Douglas W. Dooley, Menominee, MI (US);
L. E. Jones Company, Menominee, MI (US);
Abstract
A prehardened valve seat insert and a process for forming a prehardened valve seat insert for insertion into a cylinder head or an engine block of an internal combustion engine. The process comprises the steps of (a) forming the valve seat insert; (b) precision machining the valve seat insert to precise tolerances so that the valve seat insert can be installed in one of the cylinder head and the engine block without the need for additional seat machining; and (c) treating the valve seat insert to form a wear resistant surface layer prior to inserting the valve seat insert into one of the cylinder head and the engine block.