Patents by Inventor Jeanne M. Yaunke

Jeanne M. Yaunke 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).

  • Hydraulic crowd control mechanism for a mining shovel
    Patent number: 7174826
    Abstract: A crowd control mechanism for a power shovel includes an extendible dipper handle having an extended position and a retracted position. A double acting hydraulic cylinder having a an extendible ram has one of the cylinder and the ram fixed to the dipper handle and the other of the cylinder and the ram is stationary relative to the dipper handle. At least one of the cylinder and the ram have at least one of a blind end port and a rod end port, and at least one of the cylinder and the ram have the other of the blind end port and the rod end port, wherein hydraulic fluid flowing into the cylinder through the blind end port urges the ram toward an extended position to extend the dipper handle, and hydraulic fluid flowing into the rod end port urges the ram toward a retracted position to retract the dipper handle. Hydraulic fluid flowing into and out of the cylinder is controlled by one or more pilot operated poppet valves.
    Type: Grant
    Filed: January 24, 2005
    Date of Patent: February 13, 2007
    Assignee: Bucyrus International, Inc.
    Inventors: Timothy R. Kerrigan, Carl D. Gilmore, Matthew Brueck, Jeanne M. Yaunke, Michael Haws, Michael G. Onsager