Patents by Inventor David L. Bonnett

David L. Bonnett 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).

  • Monitoring and detecting empty fluid containers in a blood processing system
    Patent number: 9649422
    Abstract: Systems and methods for determining when a fluid supply container of a blood processing apparatus becomes empty. The system uses a scale to monitor and detect when a fluid supply container is empty based on the rate of change of the container weight, and a controller receives a signal from the scale and controls the operation of a pump to stop pumping when the fluid supply container is empty.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: May 16, 2017
    Assignee: Fenwal, Inc.
    Inventors: Timothy A. Johnson, David L. Bonnett, Robert J. Cantu, Russell D. Stinaff, Carole Lynn Stinaff
  • System and method for controlling patient fluid balance and/or flow rate for a therapeutic plasma exchange procedure
    Patent number: 8545426
    Abstract: Systems and methods for controlling fluid flow during a fluid exchange procedure. In one aspect, a system is provided for controlling a net fluid volume difference of a patient during and/or after a fluid exchange procedure. The system comprises a first flow path for flowing at least a first fluid from the patient and a second flow path for flowing at least a second fluid to the patient. First and second reservoirs are respectively associated with the first and second flow paths. A controller is associated with the first and second flow paths for controlling first and second flow rates and operable to determine an actual flow rate for each first and second fluid and to change a first or second flow rate in response to a difference between at least one of such flow rates and its respective actual flow rate.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: October 1, 2013
    Assignee: Fenwal, Inc.
    Inventors: Robert J. Cantu, Timothy J. Patno, Timothy A. Johnson, David L. Bonnett, Carole Lynn Stinaff
  • Monitoring And Detecting Empty Fluid Containers In A Blood Processing System
    Publication number: 20120285545
    Abstract: Systems and methods for determining when a fluid supply container of a blood processing apparatus becomes empty. The system uses a scale to monitor and detect when a fluid supply container is empty based on the rate of change of the container weight, and a controller receives a signal from the scale and controls the operation of a pump to stop pumping when the fluid supply container is empty.
    Type: Application
    Filed: July 25, 2012
    Publication date: November 15, 2012
    Inventors: Timothy A. Johnson, David L. Bonnett, Robert J. Cantu, Russell D. Stinaff, Carole Lynn Stinaff
  • System and Method For Controlling Patient Fluid Balance And/Or Flow Rate For A Therapeutic Plasma Exchange Procedure
    Publication number: 20100168639
    Abstract: Systems and methods for controlling fluid flow during a fluid exchange procedure. In one aspect, a system is provided for controlling a net fluid volume difference of a patient during and/or after a fluid exchange procedure. The system comprises a first flow path for flowing at least a first fluid from the patient and a second flow path for flowing at least a second fluid to the patient. First and second reservoirs are respectively associated with the first and second flow paths. A controller is associated with the first and second flow paths for controlling first and second flow rates and operable to determine an actual flow rate for each first and second fluid and to change a first or second flow rate in response to a difference between at least one of such flow rates and its respective actual flow rate.
    Type: Application
    Filed: February 27, 2009
    Publication date: July 1, 2010
    Applicant: Fenwal, Inc.
    Inventors: Robert Cantu, Timothy J. Patno, Timothy A. Johnson, David L. Bonnett, Russell D. Stinaff, Carole Lynn Stinaff
  • Monitoring and Detecting Empty Fluid Containers in A Blood Processing System
    Publication number: 20090212070
    Abstract: Systems and methods for determining when a fluid supply container of a blood processing apparatus becomes empty. The system uses a scale to monitor and detect when a fluid supply container is empty based on the rate of change of the container weight, and a controller receives a signal from the scale and controls the operation of a pump to stop pumping when the fluid supply container is empty.
    Type: Application
    Filed: February 27, 2009
    Publication date: August 27, 2009
    Inventors: Timothy A. Johnson, David L. Bonnett, Robert J. Cantu, Russell D. Stinaff, Carole Lynn Stinaff