Patents by Inventor Stefan Pendrick

Stefan Pendrick 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).

  • Railroad car truck spring jack
    Patent number: 5791033
    Abstract: A railroad car truck frame jack clamps a side frame, the clamps suspend a cross tube which in turn suspends one or more cylinders which raise a bolster plug thereby lifting the bolster relative to the side frame and decompressing the truck springs for repair or replacement, twisting loads being minimized in the preferred embodiment by a lost motion slot.
    Type: Grant
    Filed: November 27, 1996
    Date of Patent: August 11, 1998
    Assignee: Holland Company
    Inventors: Robert V. Norby, Henry F. Ninstil, Stefan Pendrick