Patents by Inventor Lyle L. Johnson

Lyle L. Johnson 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 interblock system
    Patent number: 5577876
    Abstract: A control apparatus controls movement of a lift arm and tool on a skid steer loader. Power actuators are coupled to the lift arm circuit and the tool circuit for moving the lift arm and tool along a path. A sensor is coupled to the skid steer loader for sensing a desired parameter and providing a signal indicative of the desired parameter. A power interrupter is coupled between the power actuators for the lift arm and tool and the sensor and interrupts power to the actuators based on the signal. A manually operable bypass mechanism is coupled to the power interrupter and the power actuators and is used to bypass the power interrupter to allow movement of the lift arm.
    Type: Grant
    Filed: February 22, 1994
    Date of Patent: November 26, 1996
    Assignee: Clark Equipment Company
    Inventors: Thomas Q. Haeder, Larry E. Albright, Orlan J. Loraas, William C. Shelbourn, Gerald M. Berg, Lyle L. Johnson, Thomas M. Sagaser, Knute K. Brock