Patents by Inventor Robert B. Case

Robert B. Case 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).

  • Heart assist device
    Patent number: 4902273
    Abstract: Improved heart assist devices are disclosed. An improved heart assist device includes a catheter having a first lumen and a second lumen. An inflatable intraventricular balloon is located at the distal end of the catheter. The interior of the intraventricular balloon communicates with the first lumen of the catheter. An inflatable intraaortic balloon is located between the proximal and distal ends of the catheter. The interior of the intraaortic balloon communicates with the second lumen of the catheter. The heart assist device also includes a pumping mechanism that inflates and deflates both the intraventricular balloon and the intraaortic balloon. The improved heart assist device is inserted into the heart so that the intraventricular balloon is positioned in the left ventricle and so that the intraaortic balloon is positioned in the aorta. The intraventricular balloon is inflated during left ventricular systole, and the intraaortic balloon is deflated during left ventricular systole.
    Type: Grant
    Filed: March 22, 1988
    Date of Patent: February 20, 1990
    Inventors: Daniel S. J. Choy, Robert B. Case
  • Heart assist device and method of use
    Patent number: 4771765
    Abstract: Improved heart assist devces are disclosed. An improved heart assist device includes a catheter having a first lumen and a second lumen. An inflatable intraventricular balloon is located at the distal end of the catheter. The interior of the intraventricular balloon communicates with the first lumen of the catheter. An inflatable intraaortic balloon is located between the proximal and distal ends of the catheter. The interior of the intraaortic balloon communicates with the second lumen of the catheter. The heart assist device also includes a pumping mechanism that inflates and deflates both the intraventricular balloon and the intraaortic balloon. The improved heart assist device is inserted into the heart so that the intraventricular balloon is positioned in the left ventricle and so that the intraaortic balloon is positioned in the aorta. The intraventricular balloon is inflated during left ventricular systole, and the intraaortic balloon is deflated during left ventricular systole.
    Type: Grant
    Filed: December 16, 1985
    Date of Patent: September 20, 1988
    Inventors: Daniel S. J. Choy, Robert B. Case