Patents by Inventor LeRoy A. Maxfield

LeRoy A. Maxfield 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).

  • Patent number: 5411450
    Abstract: A system for shifting gears in an auxiliary transmission is provided. The system enables shifting between gears of an auxiliary transmission without stopping the vehicle and without requiring a clutch between drive-line components. The system is activated by the operator while the vehicle is moving and includes safety features that preclude downshifting when the vehicle is traveling above a predetermined speed. The system is fully compatible with automatic main transmissions. An electronic control system monitors the rotational velocities or frequencies of the input and output shafts for clutchless shifting while the vehicle is moving.
    Type: Grant
    Filed: April 1, 1993
    Date of Patent: May 2, 1995
    Assignee: Oshkosh Truck Corporation
    Inventors: Andrew B. Gratton, Anthony A. Bachhuber, LeRoy A. Maxfield, Jeffrey M. Miller
  • Patent number: 5209003
    Abstract: An auger type snow blower assembly having an auger with two sets of rotating ribbon spokes which transfer snow from the auger to an impeller inlet located at the mid-portion of the auger assembly, the ribbon spokes terminating a substantial distance short of the center of the auger assembly whereby snow lying directly in the center of the path of the auger assembly may move directly to the impeller inlet without contact with the ribbons. Further, the ribbons revolve around a generally cone-shaped structure at the ends of the auger assembly whereby the ribbons and the stationary cones cooperate to impel snow entering the auger assembly toward the impeller inlet. The auger assembly further includes a bi-directional, variable speed hydraulic drive system for the ribbon system consisting of variable forward speeds and reverse speeds, the forward speeds including a low ribbon speed high torque speed, and a high ribbon speed low torque speed, together with pressure relief valves to avoid the use of shear pins.
    Type: Grant
    Filed: November 4, 1991
    Date of Patent: May 11, 1993
    Assignee: Oshkosh Truck Corporation
    Inventors: LeRoy Maxfield, Donald H. Verhoff, David R. Church