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:
Feb. 04, 2014
Filed:
Mar. 18, 2009
Applicants:
Steffen Hoppe, Overath, DE;
Manfred Fischer, Leichlingen, DE;
Inventors:
Steffen Hoppe, Overath, DE;
Manfred Fischer, Leichlingen, DE;
Assignee:
Federal-Mogul Burscheid GmbH, Burscheid, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F16J 9/26 (2006.01);
U.S. Cl.
CPC ...
Abstract
A piston ring with a DLC coating comprises an adhesive layer on a base material from inside to outside, an amorphous metallic hydrocarbon layer and an amorphous non-metallic hydrocarbon layer, wherein primarily spbonds predominate in the metallic hydrocarbon layer and the non-metallic hydrocarbon layer comprises spand spbonds, the spbond fraction being higher than in the metallic hydrocarbon layer so that an electrical resistance of the DLC coating arises, said resistance being in the range greater than 5000 ohms, in particular greater than 5000 kohms.