Patents by Inventor David Zappetini

David Zappetini 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: 9102574
    Abstract: A composting machine, particularly for vermicompost, is elongated in shape. Grates with openings are laid into a frame of the machine, onto cross beams which correctly locate the grates to be closely adjacent to one another except along a longitudinal center line of the machine, where the spaced-apart grates form a guiding channel through the length of the machine. Within this travels a downwardly extending keel of a carriage that is moved through the length of the machine when a bottom layer of finished compost is to be harvested from the bottom of the mass of compost material. To the carriage is attached a cutting blade extending the width of the machine, driven by longitudinal tension lines under the control of a driving motor. A tensioner maintains tension in the cable.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: August 11, 2015
    Inventors: Jack L. Chambers, Thomas R. Craig, David Zappetini