Patents by Inventor James D. Liebel

James D. Liebel 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).

  • Compression release engine brake slave piston drive train
    Patent number: 5479896
    Abstract: The slave piston drive train in a compression release engine braking system includes a slave piston with a rigidly connected extension. The end of the extension remote from the main body of the slave piston is spherically convex. A bearing pad or foot fits in swivel fashion on this spherically convex end. The outer surface of the foot opposite the spherically convex extension end is substantially flat and bears on a substantially flat surface on an exhaust valve rocker arm.
    Type: Grant
    Filed: August 26, 1994
    Date of Patent: January 2, 1996
    Assignee: Diesel Engine Retarders, Inc.
    Inventors: Kurt E. Freiburg, James D. Liebel
  • Compression release engine brake slave piston drive train
    Patent number: 5365916
    Abstract: The slave piston drive train in a compression release engine braking system includes a slave piston with a rigidly connected extension. The end of the extension remote from the main body of the slave piston is spherically convex. A bearing pad or foot fits in swivel fashion on this spherically convex end. The outer surface of the foot opposite the spherically convex extension end is substantially flat and bears on a substantially flat surface on an exhaust valve rocker arm.
    Type: Grant
    Filed: June 23, 1993
    Date of Patent: November 22, 1994
    Assignee: Jacobs Brake Technology Corporation
    Inventors: Kurt E. Freiburg, James D. Liebel