×

COMPACT, IMPLANTABLE APPARATUS FOR PUMPING BLOOD TO SUSTAIN BLOOD CIRCULATION IN A LIVING BODY

  • US 3,860,968 A
  • Filed: 11/20/1969
  • Issued: 01/21/1975
  • Est. Priority Date: 11/20/1969
  • Status: Expired due to Term
First Claim
Patent Images

1. In an artificial heart serving as a complete heart substitute, or a bypass, or a relief, the combination comprising:

  • first means defining a pressure chamber filled with gas, having aligned openings repectively on opposite sides, further including a piston movable transverse to the direction of alignment of the openings, for increasing volume, and decreasing pressure, and vice versa, in the chamber;

    a deformable bladder suspended in the chamber to be surrounded by the gas in the chamber and having aligned inlet and outlet tubes, respectively placed in the openings, thereby, closing the chamber as to these openings, the inlet and outlet tubes provided for respective connection to venous and/or arterial blood vessels;

    second means connected to thE first means, and serving as piston chamber extension on the side of the piston opposite the side thereof facing the pressure chamber, the second means defining a second chamber filled with the same gas as the first chamber, there being duct defining means to cause communication between first and second chambers in a retracted position of the piston relative to the first chamber;

    motor means supported by the second means and providing a rotary output;

    third means linking the rotary output of the motor means to the piston for imparting upon the piston a reciprocating motion; and

    valve means for opening and closing the flow path in the inlet and outlet tubes anticyclically and in synchronism with the pressure change in the pressure chamber and the bladder as controlled by the piston.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×