Patents by Inventor Randy Dwiggins

Randy Dwiggins 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).

  • Methods and systems for cement finishing mill control
    Patent number: 7591440
    Abstract: Methods and systems for controlling a cement finishing mill, and operating the mill at an optimal point, are disclosed. To determine an optimal point of operation, values of mill power and sound are collected and compared to values predicted by a model to determine if the mill is choking. This choking determination is used in one of two processes to determine an optimal point of operation for the mill. In the first process, as long as the mill is not choking, the amount of fresh feed input to the mill is incrementally increased; when choking occurs, the amount of fresh feed is decreased until choking ceases. In the second process, the amount of fresh feed input to the mill is increased and decreased in an oscillating manner over time, to find the amount of feed that results in the mill approaching, but never reaching, a choking state.
    Type: Grant
    Filed: August 15, 2005
    Date of Patent: September 22, 2009
    Assignee: Invensys Systems, Inc.
    Inventors: Alan Morrow, Fayyaz Hussain, Lewis Gordon, Randy Dwiggins
  • Methods and systems for cement finishing mill control
    Publication number: 20060060684
    Abstract: Methods and systems for controlling a cement finishing mill, and operating the mill at an optimal point, are disclosed. To determine an optimal point of operation, values of mill power and sound are collected and compared to values predicted by a model to determine if the mill is choking. This choking determination is used in one of two processes to determine an optimal point of operation for the mill. In the first process, as long as the mill is not choking, the amount of fresh feed input to the mill is incrementally increased; when choking occurs, the amount of fresh feed is decreased until choking ceases. In the second process, the amount of fresh feed input to the mill is increased and decreased in an oscillating manner over time, to find the amount of feed that results in the mill approaching, but never reaching, a choking state.
    Type: Application
    Filed: August 15, 2005
    Publication date: March 23, 2006
    Applicant: Invensys Systems, Inc.
    Inventors: Alan Morrow, Fayyaz Hussain, Lewis Gordon, Randy Dwiggins