Patents by Inventor Bernard Rafferty

Bernard Rafferty 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 control system with power loss ride through
    Patent number: 6981940
    Abstract: A control system for a centrifuge that allows the centrifuge to continue to run when there is a short duration failure or outage of the AC power source. The control system allows the centrifuge to be brought to a stop in a normal shutdown mode where there are longer duration failures or outages of the AC power source. This allows power to be maintained to the pump that lubricates the centrifuge bearings so that the bearings are lubricated during the coast down of the centrifuge and the differential speed of the centrifuge to be controlled during coast down allowing the centrifuge bowl to be cleared of solids so that the centrifuge can be immediately started up at lower vibration levels once power is restored.
    Type: Grant
    Filed: June 23, 2003
    Date of Patent: January 3, 2006
    Assignee: ABB Inc.
    Inventor: Bernard Rafferty
  • Centrifuge control system with power loss ride through
    Publication number: 20040259710
    Abstract: A control system for a centrifuge that allows the centrifuge to continue to run when there is a short duration failure or outage of the AC power source. The control system allows the centrifuge to be brought to a stop in a normal shutdown mode where there are longer duration failures or outages of the AC power source. This allows power to be maintained to the pump that lubricates the centrifuge bearings so that the bearings are lubricated during the coast down of the centrifuge and the differential speed of the centrifuge to be controlled during coast down allowing the centrifuge bowl to be cleared of solids so that the centrifuge can be immediately started up at lower vibration levels once power is restored.
    Type: Application
    Filed: June 23, 2003
    Publication date: December 23, 2004
    Applicant: ABB Inc.
    Inventor: Bernard Rafferty