Patents by Inventor Burton R. Freeman

Burton R. Freeman 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: 4219301
    Abstract: A vertical conveyor comprising an upstanding support including spaced-apart, horizontally spaced, vertically disposed side frame members. A platform for supporting the object to be conveyed is positioned between the frame members and is vertically movable thereon from a lowermost position to an uppermost position. A first elongated power cylinder is mounted on the support adjacent one of the frame members and is substantially vertically disposed. A piston is positioned within the first power cylinder and has cables secured thereto which extend outwardly from opposite ends of the cylinder. The cables are connected to the upper and lower portions of the platform so that downward movement of the piston in the first power cylinder will cause the platform to be vertically moved upwardly and so that upward movement of the piston in the first power cylinder will cause the platform to be vertically moved downwardly.
    Type: Grant
    Filed: January 16, 1979
    Date of Patent: August 26, 1980
    Inventor: Burton R. Freeman