Patents by Inventor Charlotte Vieillard

Charlotte Vieillard 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).

  • Patent number: 10753396
    Abstract: A Hybrid rolling bearing includes an inner raceway and an outer raceway and a plurality of rolling elements arranged therebetween. The outer raceway and the inner raceway are made from bearing steel, having a first surface RMS roughness Rq1. The rolling elements are made from a ceramic material and have second surface RMS roughnesses Rq2,i. At least one of the rolling elements has an increased surface RMS roughness Rq2,N, which is significantly higher than the RMS roughnesses Rq2,i, of the remaining rolling elements. The hybrid rolling bearing can be installed within a refrigerant compressor.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: August 25, 2020
    Assignee: Aktiebolaget SKF
    Inventors: Rudolf Hauleitner, Guillermo Enrique Morales Espejel, Antonio Gabelli, Aidan Kerrigan, Charlotte Vieillard
  • Publication number: 20190186541
    Abstract: A Hybrid rolling bearing includes an inner raceway and an outer raceway and a plurality of rolling elements arranged therebetween. The outer raceway and the inner raceway are made from bearing steel, having a first surface RMS roughness Rq1. The rolling elements are made from a ceramic material and have second surface RMS roughnesses Rq2,i. At least one of the rolling elements has an increased surface RMS roughness Rq2,N, which is significantly higher than the RMS roughnesses Rq2,i, of the remaining rolling elements. The hybrid rolling bearing can be installed within a refrigerant compressor.
    Type: Application
    Filed: September 5, 2018
    Publication date: June 20, 2019
    Inventors: Rudolf Hauleitner, Guillermo Enrique Morales Espejel, Antonio Gabelli, Aidan Kerrigan, Charlotte Vieillard
  • Patent number: 8967875
    Abstract: A bearing includes a liquid lubricant and at least one ceramic component, which, during operation of the bearing, is subject to rolling contact load. A tribological surface of the at least one ceramic component is impregnated with a sealant, such that the liquid lubricant is prevented from entering discontinuities in the tribological surface.
    Type: Grant
    Filed: November 25, 2010
    Date of Patent: March 3, 2015
    Assignee: Aktiebolaget SKF
    Inventors: Andriy Volodymyrovych Rychahivskyy, Charlotte Vieillard, Xiaobo Zhou
  • Patent number: 8927446
    Abstract: The present invention provides a ceramic material comprising: a first phase comprising zirconia, yttrium and cerium, wherein the yttrium and cerium are present in a molar ratio of 0.15 to 0.5 and in a combined amount of 5 to 15 mol %, a second phase comprising alumina, and a third phase comprising metal aluminate platelets.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: January 6, 2015
    Assignee: Aktiebolaget SKF
    Inventors: Lars Kahlman, Charlotte Vieillard, Jelena Sekulic, Knut Henrik Johansen, Hans Hillen Schjelderup
  • Patent number: 8771585
    Abstract: The invention concerns a method for manufacturing a ceramic material with pseudo-isotropic microstructure. The method for tailoring the microstructure for manufacturing of sintered ceramic components involves a spark plasma sintering (SPS) process. By performing the SPS process in at least two steps it is possible to separate densification from grain growth. An initial sintering step at a first temperature and a first pressure, followed by a controlled grain growth step at a higher temperature and lower pressure makes it possible to manufacture ceramic components with controlled microstructure and improved mechanical properties.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: July 8, 2014
    Assignee: AB SKF
    Inventors: Zhijian Shen, Saeid Esmaeilzadeh, Katarina Flodstrom, Charlotte Vieillard
  • Patent number: 8772190
    Abstract: The invention concerns a sintered ceramic component of silicon nitride or sialon suitable as rolling element in a bearing and a manufacturing method for making such ceramic components. The ceramic component has high density and a homogeneous and fine microstructure, giving the component excellent mechanical properties. Manufacturing of the sintered ceramic component by SPS is cost-effective and rapid.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: July 8, 2014
    Assignee: AB SKF
    Inventors: Zhijian Shen, Saeid Esmaeilzadeh, Katarina Flodstrom, Charlotte Vieillard
  • Publication number: 20130315520
    Abstract: The present invention relates a bearing comprising a liquid lubricant and at least one ceramic component (105, 115, 125), which, during operation of the bearing, is subject to rolling contact load. According to the invention, a tribological surface (110, 120, 130) of the at least one ceramic component is impregnated with a sealant, such that the liquid lubricant is prevented from entering discontinuities in the tribological surface.
    Type: Application
    Filed: November 25, 2010
    Publication date: November 28, 2013
    Applicant: AKTIEBOLAGET SKF
    Inventors: Andriy Volodymyrovych Rychahivskyy, Charlotte Vieillard, Xiaobo Zhou
  • Publication number: 20120163744
    Abstract: The present invention provides a ceramic material comprising: a first phase comprising zirconia, yttrium and cerium, wherein the yttrium and cerium are present in a molar ratio of 0.15 to 0.5 and in a combined amount of 5 to 15 mol %, a second phase comprising alumina, and a third phase comprising metal aluminate platelets.
    Type: Application
    Filed: June 30, 2009
    Publication date: June 28, 2012
    Applicant: AKTIEBOLAGET SKF
    Inventors: Lars Kahlman, Charlotte Vieillard, Jelena Sekulic, Knut Henrik Johensen, Hans Hillen Schjelderup
  • Publication number: 20110266719
    Abstract: The invention concerns a sintered ceramic component of silicon nitride or sialon suitable as rolling element in a bearing and a manufacturing method for making such ceramic components. The ceramic component has high density and a homogeneous and fine microstructure, giving the component excellent mechanical properties. Manufacturing of the sintered ceramic component by SPS is cost-effective and rapid.
    Type: Application
    Filed: August 29, 2008
    Publication date: November 3, 2011
    Applicant: AB SKF
    Inventors: Zhijian Shen, Saeid Esmaeilzadeh, Katarina Flodstrom, Charlotte Vieillard
  • Publication number: 20110260368
    Abstract: The invention concerns a method for manufacturing a ceramic material with pseudo-isotropic microstructure. The method for tailoring the microstructure for manufacturing of sintered ceramic components involves a spark plasma sintering (SPS) process. By performing the SPS process in at least two steps it is possible to separate densification from grain growth. An initial sintering step at a first temperature and a first pressure, followed by a controlled grain growth step at a higher temperature and lower pressure makes it possible to manufacture ceramic components with controlled microstructure and improved mechanical properties.
    Type: Application
    Filed: August 29, 2008
    Publication date: October 27, 2011
    Applicant: AB SKF
    Inventors: Zhijian Shen, Saeid Esmaeilzadeh, Katarina Flodstrom, Charlotte Vieillard
  • Patent number: 7798724
    Abstract: A bearing includes an inner bearing ring on which a raceway is formed. The ring includes at least a first component of light metal material and at least a second component of fully dense ceramic material, where the first component and the second component are separate entities joined together, and where the second component forms at least part of the raceway. The first component includes two lightweight metal parts interconnected by a screw thread which can be tightened to induce compressive pre-stress in the second component to compensate for low tensile strength of the ceramic material.
    Type: Grant
    Filed: July 15, 2005
    Date of Patent: September 21, 2010
    Assignee: AB SKF
    Inventors: Johannes Franciscus Van De Sanden, Martinus Maria Jozef Noordman, Alexander Jan Carel De Vries, Peggy Suzanne Charlotte Vieillard
  • Publication number: 20080101735
    Abstract: A bearing comprises at least one bearing ring on which a raceway is formed. The ring comprises at least a first component of light metal material and at least a second component of fully dense ceramic material, where the first component and the second component are separate entities joined together, and where the second component comprises at least part of the raceway.
    Type: Application
    Filed: July 15, 2005
    Publication date: May 1, 2008
    Applicant: AB SKF
    Inventors: Johannes Franciscus Van De Sanden, Martinus Maria Jozef Noordman, Alexander Jan Carel De Vries, Peggy Suzanne Charlotte Vieillard
  • Patent number: 6702473
    Abstract: An improved rolling bearing, in particular one being used in aqueous environment, such as water and steam, comprising an outer race, an inner race, rolling elements, and a retainer holding said rolling elements in a spaced relation from each other, wherein the races of the bearing are made of stellite, the rolling elements are made of hot-isostatic-pressed alumina-zirconia composites, and the retainer is made of poly-ether ether ketone comprising graphite fibers, graphite powder, and polytetrafluoroethylene.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: March 9, 2004
    Assignee: Aktiebolaget SKF
    Inventors: Lars Kahlman, Robin Cundill, Charlotte Vieillard, Maarten Noordman
  • Publication number: 20020168125
    Abstract: The present invention relates to an improved rolling bearing, in particular one being used in aqueous environment, such as water and steam, comprising an outer race, an inner race, rolling elements, and a retainer holding said rolling elements in a spaced relation from each other, wherein the races of the bearing are made of stellite, the rolling elements are made of hot-isostatic-pressed alumina-zirconia composites, and the retainer is made of poly-ether ether ketone comprising graphite fibers, graphite powder, and polytetrafluoroethylene.
    Type: Application
    Filed: December 18, 2001
    Publication date: November 14, 2002
    Inventors: Lars Kahlman, Robin Cundill, Charlotte Vieillard, Maarten Noordman