Patents by Inventor Kay Stapelbroek

Kay Stapelbroek 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).

  • Insert for a cylinder sleeve or a cylinder of an internal combustion engine
    Patent number: 7484493
    Abstract: An insert for a cylinder sleeve or a cylinder of an internal combustion engine is provided for narrowing the diameter of the cylinder sleeve or cylinder in the region of the upper dead center of a piston guided in the cylinder sleeve or cylinder. The insert is formed as an open, biased ring having a ring joint, which ring is held radially by means of its radial forces, which act outward, and axially by a recess in the cylinder sleeve or cylinder, in such a manner that the radial surface pressure is approximately the same on the circumference, whereby its ratio of ring wall thickness (d) to inside diameter (D) of the cylinder sleeve or the cylinder amounts to between 0.001 and 0.02.
    Type: Grant
    Filed: April 18, 2007
    Date of Patent: February 3, 2009
    Assignee: Mahle International GmbH
    Inventors: Ulrich Bischofberger, Kay Stapelbroek
  • Insert for a cylinder sleeve or a cylinder of an internal combustion engine
    Publication number: 20080150237
    Abstract: An insert for a cylinder sleeve or a cylinder of an internal combustion engine is provided for narrowing the diameter of the cylinder sleeve or cylinder in the region of the upper dead center of a piston guided in the cylinder sleeve or cylinder. The insert is formed as an open, biased ring having a ring joint, which ring is held radially by means of its radial forces, which act outward, and axially by a recess in the cylinder sleeve or cylinder, in such a manner that the radial surface pressure is approximately the same on the circumference, whereby its ratio of ring wall thickness (d) to inside diameter (D) of the cylinder sleeve or the cylinder amounts to between 0.001 and 0.02.
    Type: Application
    Filed: April 18, 2007
    Publication date: June 26, 2008
    Inventors: Ulrich Bischofberger, Kay Stapelbroek