Patents by Inventor Ralph W. Zollers

Ralph W. Zollers 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: 5417517
    Abstract: A vibrating tamping float for smoothing the top surface of freshly poured concrete, pushing coarse aggregates down into the concrete while allowing cream to surface, and reducing a formation of large air pockets in the concrete, includes a float body having a bottom surface and a pushing device for pushing coarse aggregates down into the concrete while allowing cream to surface. The pushing device includes a plurality of ribs mounted on the bottom surface of the float body. The ribs have a ramp on front and rear portions thereof for providing a smooth entrance into the concrete and pushing coarse aggregates downward as they are slid back and forth in the concrete. A vibrator is provided on the float body for vibrating the float body to reduce a formation of large air pockets in the concrete, to aid in pushing the coarse aggregates on the surface down into the concrete, and to aid in leveling-off and smoothing the top surface of the concrete.
    Type: Grant
    Filed: April 14, 1993
    Date of Patent: May 23, 1995
    Inventor: Ralph W. Zollers