Patents by Inventor Jacob P. Den Hartog

Jacob P. Den Hartog 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).

  • Centrifuge with chatter suppression
    Patent number: 4069967
    Abstract: Chatter is suppressed in a solids-liquid separating centrifuge by including, in an external connection to a holder of the speed change gearing between the centrifuge bowl and conveyor, a spring and mass means which is torsionally resilient about the axis of the connection such that it will vibrate about that axis under chatter conditions at the chatter frequency, and which has a spring rate within +40% to -25% of the spring rate at which the spring and mass means will vibrate in resonance with the vibration during chatter of the bowl-gearing-conveyor assembly.
    Type: Grant
    Filed: October 14, 1976
    Date of Patent: January 24, 1978
    Assignee: Bird Machine Company, Inc.
    Inventors: Herbert L. Crosby, Jacob P. Den Hartog
  • Centrifuge with chatter suppression
    Patent number: 4069966
    Abstract: Chatter is suppressed in a solids-liquid separating centrifuge by including, in an external connection to a holder of the speed change gearing between the centrifuge bowl and conveyor, a spring and mass means which is torsionally resilient about the axis of the connection such that it will vibrate about that axis under chatter conditions at the chatter frequency, together with damping means acting in parallel with the spring and mass means to apply resistance to the torsional vibration thereof and thereby irreversibly extract energy therefrom.
    Type: Grant
    Filed: October 14, 1976
    Date of Patent: January 24, 1978
    Assignee: Bird Machine Company, Inc.
    Inventors: Herbert L. Crosby, Jacob P. Den Hartog