Patents by Inventor Nathan J. Alme

Nathan J. Alme 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).

  • Variable displacement hydrostatic pump and improved gain control thereof
    Patent number: 5226349
    Abstract: A variable displacement axial piston pump (11) is disclosed of the type including a displaceable cam member (39) to vary the pump displacement in response to operation of a fluid pressure actuated servo assembly (15). The servo assembly includes a servo piston (47), the position of which is controlled in response to control fluid in a pair of servo chambers (53,55). The flow of control fluid pressure from a charge pump (27) to the servo chambers is controlled by a manual controller (17), which includes a main control orifice (105). The nominal gain rate of the pump and servo assembly is determined largely by the main control orifice (105). The servo piston (47) defines a servo orifice (113) communicating between the servo chambers.
    Type: Grant
    Filed: July 15, 1992
    Date of Patent: July 13, 1993
    Assignee: Eaton Corporation
    Inventors: Nathan J. Alme, Robert C. Horst