Patents by Inventor Willard O. Elmer

Willard O. Elmer 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).

  • High clearance self-propelled vehicle with variable clearance and variable wheel spacing
    Patent number: 4619340
    Abstract: A vehicle has a frame (2), wheel assemblies (3) connected to the frame, and a lateral support assembly (4) connected between each of the front wheel assemblies and the rear wheel assemblies. Each wheel assembly is pivotally connected by an upper pivot member (92) to an upright post (24). A collar (85) is slidable up and down on each post. Bracing hydraulic cylinders (115) connect between the support assembly and the wheel assemblies. A control circuit for the cylinders (115) with a control valve (177) maintains the wheel assemblies upright. Elevator hydraulic cylinders (127) transmit the weight of the frame to the wheels. A control circuit with position control valves (153) automatically adjusts the elevator hydraulic cylinders (127) to hold the frame at a preset elevation and a control circuit with position control valves (171) automatically adjusts the wheel spacing hydraulic cylinders (166) to hold the wheels at a preset spacing.
    Type: Grant
    Filed: January 14, 1985
    Date of Patent: October 28, 1986
    Inventors: Willard O. Elmer, Edgar J. Rickel