Patents by Inventor Luigi Bonalumi

Luigi Bonalumi 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).

  • Machine with at least two high operating force working shafts
    Patent number: 5092189
    Abstract: A machine with at least two working shafts, particularly a double-screw extruder machine, comprises associated with each shaft a gear rotated by a drive gear, coaxial to said shaft and gear by way of at least two idle gear wheels acting on said gear and disposed within the drive gear.Each idle gear wheel rotates about a shaft supported by a support member which is advantageously mobile in a plane orthogonal to the axis of the shaft and is disposed about this latter; between the drive gear and idle gear wheels there is provided a floating gear to transmit the drive force of the drive gear to said idle gear wheels.
    Type: Grant
    Filed: November 14, 1989
    Date of Patent: March 3, 1992
    Inventor: Luigi Bonalumi