Patents by Inventor Udo Krug

Udo Krug 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: 9273727
    Abstract: A method for manufacturing a raceway element of a bearing assembly includes hardening a raceway element having a raceway surface by at least partially heating the raceway element, deep rolling the raceway surface using a first rolling element, and then deep rolling the raceway surface using a second rolling element. The first rolling element has at least one different dimension than the second rolling element. In the resulting raceway element, compressive residual stresses of at least 400 MPa are present at a depth from the raceway surface of 200 ?m or less, and between the raceway surface and a depth of 100 ?m from the raceway surface, the amount of the compressive residual stresses changes by 500 MPa or less.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: March 1, 2016
    Assignee: AKTIEBOLAGET SKF
    Inventors: Juergen Gegner, Udo Krug, Armin Olschewski, Arno Stubenrauch
  • Patent number: 9103369
    Abstract: A bearing assembly includes two tapered roller bearings having inner and outer rings and tapered rollers therebetween. The inner rings are mounted to a first machine part, and the outer rings are mounted on an adapter sleeve on a second machine part. The adapter sleeve has a first end axially fixed relative to the second machine part and a second end axially spaced from an axial stop of the second machine part by an axial gap. At a non-operating temperature, such as 20° C., the gap has a width of about 30 ?m to 250 ?m, and at an operating temperature of over 50° C. the gap disappears and the second end contacts the axial stop. The width of the gap at the non-operating temperature is selected to produce a predetermined preload on the bearing assembly at the operating temperature.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: August 11, 2015
    Assignee: AKTIEBOLAGET SKF
    Inventors: Udo Krug, Armin Olschewski, Armin Schlereth, Arno Stubenrauch
  • Publication number: 20150036960
    Abstract: A method for manufacturing a raceway element of a bearing assembly includes hardening a raceway element having a raceway surface by at least partially heating the raceway element, deep rolling the raceway surface using a first rolling element, and then deep rolling the raceway surface using a second rolling element. The first rolling element has at least one different dimension than the second rolling element. In the resulting raceway element, compressive residual stresses of at least 400 MPa are present at a depth from the raceway surface of 200 ?m or less, and between the raceway surface and a depth of 100 ?mm from the raceway surface, the amount of the compressive residual stresses changes by 500 MPa or less.
    Type: Application
    Filed: October 25, 2012
    Publication date: February 5, 2015
    Inventors: Juergen Gegner, Udo Krug, Armin Olschewski, Arno Stubenrauch
  • Publication number: 20140334756
    Abstract: A bearing assembly includes two tapered roller bearings having inner and outer rings and tapered rollers therebetween. The inner rings are mounted to a first machine part, and the outer rings are mounted on an adapter sleeve on a second machine part. The adapter sleeve has a first end axially fixed relative to the second machine part and a second end axially spaced from an axial stop of the second machine part by an axial gap. At a non-operating temperature, such as 20° C., the gap has a width of about 30 ?m to 250 ?m, and at an operating temperature of over 50° C. the gap disappears and the second end contacts the axial stop. The width of the gap at the non-operating temperature is selected to produce a predetermined preload on the bearing assembly at the operating temperature.
    Type: Application
    Filed: March 22, 2012
    Publication date: November 13, 2014
    Inventors: Udo Krug, Armin Olschewski, Armin Schlereth, Arno Stubenrauch
  • Publication number: 20110028266
    Abstract: A bearing arrangement has at least two anti-friction bearings which are spaced apart along a central axis. At least one bearing is configured as a tapered roller bearing, the tapered roller bearing having a number of frustoconical rolling bodies. A cone angle between a line of symmetry of each rolling body and the central axis is between 20° and 33°.
    Type: Application
    Filed: June 30, 2010
    Publication date: February 3, 2011
    Applicant: AKTIEBOLAGET SKF
    Inventors: Thomas Friedrich, Wolfgang Husslein, Udo Krug