Patents by Inventor Bryan Michael Harper

Bryan Michael Harper 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).

  • Multi-stage hydraulic cylinder assembly
    Patent number: 9151304
    Abstract: A cushion arrangement for smoothing stage changes in an hydraulic cylinder and including at least one compression chamber of variable volume with a movable and/or deformable chamber wall element displaceable by at least one of the pistons when approaching the transition zone between first and second stages of displacement. The compression chamber is operatively connected to a gas volume to be compressed upon displacement of the chamber wall element.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: October 6, 2015
    Assignee: Liebherr-Mining Equipment Company
    Inventors: Bryan Michael Harper, James Arthur Whitfield, Jr.
  • MULTI-STAGE HYDRAULIC CYLINDER ASSEMBLY
    Publication number: 20120255432
    Abstract: A cushion arrangement for smoothing stage changes in an hydraulic cylinder and including at least one compression chamber of variable volume with a movable and/or deformable chamber wall element displaceable by at least one of the pistons when approaching the transition zone between first and second stages of displacement. The compression chamber is operatively connected to a gas volume to be compressed upon displacement of the chamber wall element.
    Type: Application
    Filed: March 14, 2012
    Publication date: October 11, 2012
    Applicant: Liebherr-Mining Equipment Company
    Inventors: Bryan Michael Harper, James Arthur Whitfield, JR.