Patents by Inventor Delmar J. Richardson

Delmar J. Richardson 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).

  • Spray boom height adjustment
    Patent number: 4878616
    Abstract: A spray boom assembly has an elongate boom carrier supported on walking beams near its opposite ends. Each of the walking beams consists of a pair of parallelogram linkages extending respectively to the front and back of the boom carrier. The parallelogram linkages are linked by an hydraulic cylinder or actuator that can be extended to rotate the parallelogram linkages downwards about their pivotal connections to the boom carrier. This raises the boom carrier without changing its orientation.
    Type: Grant
    Filed: June 16, 1988
    Date of Patent: November 7, 1989
    Inventor: Delmar J. Richardson