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. 16, 2003
Filed:
Jun. 12, 2002
Welm Friedrichsen, Nordborg, DK;
Hans-Erik Kiil, Aabenraa, DK;
Claus Tjørnly Rasmussen, Nordborg, DK;
Sauer-Danfoss Holding A/S, Nordborg, DK;
Abstract
The invention concerns a hydraulic machine ( ) with a tooth set ( ), having a gear wheel ( ), which is arranged to be rotating and orbiting in a toothed ring ( ), the tooth set ( ) being arranged between two plates ( ) in the axial direction. It is desired to extend the life of such a machine, also when operated with an impurified hydraulic fluid. For this purpose, at least a section ( ) of the circumferential surface of one of the two components, toothed ring ( ) and gear wheel ( ), is made of a material, which is substantially harder than the material of the part of the other component, gear wheel ( ) and toothed ring ( ), bearing on this section.