Patents by Inventor Michael J. Karolek

Michael J. Karolek 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).

  • Three chamber hydraulic cylinder for an active vehicle suspension with integrated load leveling
    Patent number: 7234386
    Abstract: A hydraulic actuator for an active of semi-active vehicle suspension system has a cylinder with a piston therein. A piston rod is attached to the piston and extends out of the cylinder. First and second chambers are formed on opposites sides of the piston enabling the piston to be driven in a manner that counteracts vibrations in the vehicle, A third chamber is provided in the cylinder for connection to a load leveling apparatus. A novel structure reduces the overall length of the hydraulic actuator. A displacement sensor is incorporated into the hydraulic actuator to provide an electrical signal that indicated how far the piston rod extends from the cylinder.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: June 26, 2007
    Assignee: HUSCO International, Inc.
    Inventors: David James Schedgick, Michael J. Karolek