Patents by Inventor Rolf Wellandt

Rolf Wellandt 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).

  • Cooled piston for internal combustion engines
    Patent number: 6647861
    Abstract: The invention relates to a cooled piston for internal combustion engines. The inventive piston is provided with an annular cooling channel on the periphery of the piston head. Said cooling channel, at its end that is open towards the piston shaft, is closed by a correspondingly shaped wall part that is radially split at least once. The aim of the invention is to improve the supply of cooling oil in the cooling channel. To this end, the wall part at the end allocated to the split is provided with a respective recess and with an upturned S-bend section that serves to deflect the cooling oil jet.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: November 18, 2003
    Assignee: Mahle GmbH
    Inventors: Detlef Jacobi, Rolf Wellandt