Patents Represented by Attorney Seed IP Intellectual Property Law Group PLLC
  • Patent number: 7553085
    Abstract: A fluid bearing includes hydrostatic pads formed in a surface and positioned to exert a separating force, and a land formed on the surface of the insert and configured to act as a bushing to allow rotation while the first and second pads are pressurized at less than a hydrostatic balance force. Pressurized fluid to the pads of the insert is controlled to prevent operation in full hydrostatic mode. More particularly, a separating force generated by surface force of the pads is controlled such that the separating force does not exceed a force exerted on the bearing. The fluid pressure is also controlled to keep the separating force within a selected margin of the force exerted on the bearing, to control wear of the bearing. Control of the separating force is achieved by selectively pressurizing individual hydrostatic pads, thereby effectively varying the active hydrostatic area of the bearing.
    Type: Grant
    Filed: April 28, 2006
    Date of Patent: June 30, 2009
    Assignee: The United States of America as represented by the United States Environmental Protection Agency
    Inventor: Charles L. Gray, Jr.