Patents by Inventor Hansrudolf Hartmann

Hansrudolf Hartmann 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).

  • Press for dewatering a humid substance, in particular residual refuse
    Patent number: 7398886
    Abstract: A press for the dehumidification of humid matter, in particular of residual waste is disclosed, which comprises a worm gear whereby the residual waste may be compressed mechanically. During transport with the aid of the worm gear, the humid matter is subjected to a drying medium, preferably pressurized air or a vacuum, whereby it is delivered from the press.
    Type: Grant
    Filed: September 3, 2002
    Date of Patent: July 15, 2008
    Inventors: Christian Widmer, Hansrudolf Hartmann