Patents by Inventor Waldemar Urbatzka

Waldemar Urbatzka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Piston ring with chromium solid particle wear-prevention layer and corrosion-resistant flank surface
    Patent number: 9404578
    Abstract: A coated piston ring having a base body of chromium steel with more than 10 wt.-% chromium and having an inner circumferential surface, a first flank surface, a second flank surface and an outer circumferential surface. The first flank surface comprises a nitride diffusion layer with a layer thickness of from 5-300 ?m, a nitride connecting layer with a layer thickness of from 0.5-15 ?m on the nitride diffusion layer, and an oxide layer with a layer thickness of from 0.05-3 ?m on the nitride connecting layer. The second flank surface comprises the nitride diffusion layer, and the outer circumferential surface comprises the nitride diffusion layer and a chromium solid particle layer with 0.1-30 vol.-% solid particles, relative to the total volume of the chromium solid particle layer on the nitride diffusion layer.
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: August 2, 2016
    Assignee: Federal-Mogul Burscheid GmbH
    Inventors: Christian Herbst-Dederichs, Waldemar Urbatzka, Stefan Duerdoth, Peter-Klaus Esser
  • PISTON RING WITH CHROMIUM SOLID PARTICLE WEAR-PREVENTION LAYER AND CORROSION-RESISTANT FLANK SURFACE
    Publication number: 20150054222
    Abstract: A coated piston ring having a base body of chromium steel with more than 10 wt.-% chromium and having an inner circumferential surface, a first flank surface, a second flank surface and an outer circumferential surface. The first flank surface comprises a nitride diffusion layer with a layer thickness of from 5-300 ?m, a nitride connecting layer with a layer thickness of from 0.5-15 ?m on the nitride diffusion layer, and an oxide layer with a layer thickness of from 0.05-3 ?m on the nitride connecting layer. The second flank surface comprises the nitride diffusion layer, and the outer circumferential surface comprises the nitride diffusion layer and a chromium solid particle layer with 0.1-30 vol.-% solid particles, relative to the total volume of the chromium solid particle layer on the nitride diffusion layer.
    Type: Application
    Filed: December 7, 2012
    Publication date: February 26, 2015
    Inventors: Christian Herbst-Dederichs, Waldemar Urbatzka, Stefan Dürdoth, Peter-Klaus Esser