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:
Sep. 24, 2002
Filed:
Sep. 28, 2001
Helmut Hans Ruhland, Eschweiler, DE;
Ulrich Bertram, Bergheim, DE;
Ford Global Technologies, Inc., Dearborn, MI (US);
Abstract
A valve for an internal combustion engine has a valve stem, a valve cone and a valve disk, with the valve cone having a recess to receive the valve disk, and the valve cone and valve disk together forming a cavity. The valve disk has a lesser diameter than the recess in the valve cone, so that an insulation gap is formed between the recess in the valve cone and the valve disk edge. As a result the valve cone and valve stem are thermally insulated relative to the valve disk, which results in an advantageous, lower operating temperature at the valve cone. Particularly in the case of direct-injection internal combustion engines, this reduces the tendency to coking at the valve cone.