Patents by Inventor Robert Tonry

Robert Tonry 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: 5906060
    Abstract: An improved manually pushed snow shovel in which the user's natural pushing force acts to alleviate stalling friction. A version of a manually pushed snow shovel having features of this invention comprises a blade with a leading edge, a handle attached to the blade, and at least one, although two are preferred, ski runner(s) attached to the blade. The ski runner(s) are attached such that when in the shovel is in use, the leading edge of the blade is at or behind the portion of bottoms of the ski runner(s) normally in contact with the ground. This ensures that the shovel pivot point or point of downward vertical force from the snow load is forward of the leading edge relative to forward movement of the shovel. As such, the user's natural forward pushing on the handle and hence indirectly to the blade results in the leading edge moving upwards away from the ground upon encountering increased friction due to heavy snow or rough ground surfaces.
    Type: Grant
    Filed: September 10, 1997
    Date of Patent: May 25, 1999
    Inventor: Robert Tonry