Patents by Assignee Rotochopper, Inc.
  • Patent number: 8066213
    Abstract: Advantageously, certain embodiments of the present invention provide a system that allows easy replacement of one or more worn rotor teeth and/or rotor tooth mount(s) mounted on a waste fragmenting machine. The present invention may further provide a system that allows minimization of stress during fragmentation on the attachment mechanisms between the mount and the rotor.
    Type: Grant
    Filed: March 22, 2010
    Date of Patent: November 29, 2011
    Assignee: Rotochopper, Inc.
    Inventor: Todd J. Marquardsen
  • Publication number: 20100155513
    Abstract: An auxiliary powerfeed is disclosed, which is designed to work in conjunction with other feeding devices found on a horizontal grinder, which typically include a horizontal feed conveyor and a powerfeed drum. The auxiliary powerfeed features a rotating drum on which are mounted rigid tines (or teeth) arranged in a staggered pattern. The drum is rotationally mounted within a pivotally mounted lift arm. The lift arm holds the axial shaft of the drum at each end. A set of hydraulic cylinders is mounted to the lift arm, one on each end of the drum. During operation, as a bale or other object comes into contact with the auxiliary powerfeed, the drum automatically lifts until it reaches the top of the object, the limit of its lift path, or a predetermined height that optimizes efficacy for a particular application. In some cases, the auxiliary powerfeed automatically operates differently with different feedstock consistencies.
    Type: Application
    Filed: December 18, 2009
    Publication date: June 24, 2010
    Applicant: Rotochopper, Inc.
    Inventors: Jamey Brick, Patrick Burg, Nicholas Lieser
  • Patent number: 7325759
    Abstract: A method for reducing impact damage to a waste fragmentation machine is provided in various embodiments. In general, material that is potentially ungrindable, e.g., unacceptably dense, may be inadvertently allowed to enter into the grinding chamber within the machine where it encounters a high-speed rotor. The high-speed rotor comprises rotor teeth that impact the material to fragment or comminute it to an acceptable size. A vibration detector is placed in proximity with the rotor's bearing(s) and, after taking a daily baseline sample, monitors the fragmentation process. If the vibration level goes beyond an alert upper limit, the operator may be alerted via visual and/or audible annunciation that potentially ungrindable material may be in the grinding or fragmenting chamber. The operator may then examine the waste material and, if necessary, remove any potentially ungrindable material.
    Type: Grant
    Filed: May 26, 2005
    Date of Patent: February 5, 2008
    Assignee: Rotochopper, Inc.
    Inventor: Douglas G. Meyer