Patents by Inventor John Chiasson

John Chiasson 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).

  • Non-invasive flow indicator for a rotary blood pump
    Patent number: 6447441
    Abstract: An apparatus for non-invasive flow indication through a rotary blood pump. The apparatus includes a blood pump adapted for implantation into a patient. The blood pump has a moving mechanism which contacts blood and imparts energy to the blood to move the blood in the patient at a desired flow rate. The apparatus a mechanism for causing the moving mechanism to move the blood. The causing mechanism is engaged with the moving mechanism. The causing mechanism receiving energy to power the causing mechanism. The apparatus comprises a sensorless flow indicator connected to the blood pump to identify the flow of blood through the pump based only on an energy balance between the energy imparted to the blood by the moving mechanism and the energy received by the causing mechanism. A method for determining blood flow in a patient. The method includes the steps of providing energy to a blood pump implanted in a patient to operate the pump.
    Type: Grant
    Filed: October 20, 2000
    Date of Patent: September 10, 2002
    Assignee: CardiacAssist, Inc.
    Inventors: Yih-Choung Yu, Kirk A. Lehmann, John Chiasson, Wayne P. Griffin
  • Non-invasive flow indicator for a rotary blood pump
    Patent number: 6135943
    Abstract: An apparatus for non-invasive flow indication through a rotary blood pump. The apparatus includes a blood pump adapted for implantation into a patient. The blood pump has a moving mechanism which contacts blood and imparts energy to the blood to move the blood in the patient at a desired flow rate. The apparatus includes a mechanism for causing the moving mechanism to move the blood. The causing mechanism is engaged with the moving mechanism. The causing mechanism receiving energy to power the causing mechanism. The apparatus comprises a sensorless flow indicator connected to the blood pump to identify the flow of blood through the pump based only on an energy balance between the energy imparted to the blood by the moving mechanism and the energy received by the causing mechanism. A method for determining blood flow in a patient. The method includes the steps of providing energy to a blood pump implanted in a patient to operate the pump.
    Type: Grant
    Filed: August 7, 1998
    Date of Patent: October 24, 2000
    Assignee: Cardiac Assist Technologies, Inc.
    Inventors: Yih-Choung Yu, Kirk A. Lehmann, John Chiasson, Wayne P. Griffin