Patents by Inventor Lindsay F. Radcliffe

Lindsay F. Radcliffe 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).

  • Levelling machine
    Patent number: 4871025
    Abstract: An improved ground levelling machine (10) for levelling small areas of ground comprising a main frame (11), a pivotal sub-frame (15) trailing said main frame (11) and pivotally connected thereto, a scraper blade (40) carried by the main frame (11), a hopper (27) carried on the main frame (11) for the supply of soil, sand or other filling material, a plurality of ground-engaging wheels (16) supporting the sub-frame (15), power means (22) to effect pivotal movement of the sub-frame (15) relative to the main frame (11) and to thereby raise and lower the main frame (11) relative to the ground, and control means (59) for controlling the operation of the power means (11) and to in turn control the elevation of the scraper blade (40) relative to a preselected reference plane.
    Type: Grant
    Filed: November 9, 1987
    Date of Patent: October 3, 1989
    Inventors: Trevor K. Mayfield, Lindsay F. Radcliffe