Patents by Inventor Robert E. Hummer

Robert E. Hummer 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: 5368319
    Abstract: An elevator cart is arranged to include a first tubular frame mounting a second tubular frame thereto in a reciprocating relationship relative to the first tubular frame to permit selective lifting of a workpiece on the second tubular frame relative to the first tubular frame. To this end, a handle is pivotally mounted to the first tubular frame simultaneously displacing an actuator link that in turn is arranged to rotate simultaneously a plurality of cam rods, with each cam rod having a plurality of cam members in abutment with the second tubular frame to effect a lifting and lowering of the second tubular frame upon pivoting of the handle.
    Type: Grant
    Filed: May 24, 1993
    Date of Patent: November 29, 1994
    Inventor: Robert E. Hummer