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:
Oct. 09, 2018
Filed:
Apr. 01, 2015
Koninklijke Philips N.v., Eindhoven, NL;
Peter Klaus Bachmaan, Aachen, DE;
Anand Kumar Dokania, Utrecht, DE;
Wilhelmus Cornelis Keur, Weert, NL;
Gereon Vogtmeier, Aachen, DE;
Willem Potze, Geldrop, NL;
Christian Herbert Blome, Hamburg, DE;
KONINKLIJKE PHILIPS N.V., Eindhoven, NL;
Abstract
The present invention relates to hydrodynamic bearings, X-ray tubes, X-ray systems, and a method of manufacturing a hydrodynamic bearing for an X-ray tube. The rotor of a hydrodynamic bearing is supported, in steady-state operation, by the pressure of lubricant which is pumped through grooves in the rotor. When the rotor is speeding up or slowing down, the pumping force will not be sufficient to lift the rotor clear of a stationary bushing, and damage, caused by direct contact of the metal surfaces of the bearing, can occur. Providing special coatings on the bearing surfaces can ameliorate this effect.