Patents by Inventor Douglas Ruffner

Douglas Ruffner 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).

  • IMPROVED DESIGN OF INTEGRATED ELECTRO-HYDRAULIC POWER UNIT
    Publication number: 20070053780
    Abstract: An electro-hydraulic power unit with an improved hydraulic fluid flow through the unit. The unit accomplishes the improved fluid flow by having an inlet port in a housing that is fluidly connected to an electric motor that has a rotor with vanes cast thereon and at least one opening within the rotor. A hydraulic pump inlet is fluidly connected to the electric motor such that the vanes of the electric motor will supply hydraulic fluid to the hydraulic pump inlet.
    Type: Application
    Filed: September 2, 2005
    Publication date: March 8, 2007
    Applicant: SAUER-DANFOSS INC.
    Inventors: Douglas Ruffner, Michael Gandrud, Jeff Herrin