Method and apparatus for pumping blood
First Claim
1. A method of pumping blood with the use of a body having a chamber and piston means located in said chamber comprising:
- separating the chamber into a first section and a second section with the piston means movably disposed in said chamber, reciprocating the piston means in said chamber with sequential reverse magnetic force to move blood into and out of said first and second sections of said chamber, allowing a limited amount of blood of flow around the piston means during movement thereof in said chamber, controlling the flow of blood into and out of the first section of the chamber in response to movement of the piston means in said chamber, and controlling the flow of blood into and out of the second section of the chamber in response to movement of the piston means in said chamber.
1 Assignment
0 Petitions
Accused Products
Abstract
A pump and method for moving a fluid, as blood, having a body and end members forming a cylindrical chamber. A free floating piston located in the chamber is moved along the length of the chamber with a solenoid to pump blood into and out of opposite ends of the chamber. The end members containing inlet and outlet valves and sleeves are adapted to attach to veins or tubes to carry the blood to and from the pump. When electrical power is applied to the solenoid, a magnetic force operates to move the piston in the chamber, thereby pumping blood into and out of the chamber through the valves in the opposite end members.
-
Citations
26 Claims
-
1. A method of pumping blood with the use of a body having a chamber and piston means located in said chamber comprising:
- separating the chamber into a first section and a second section with the piston means movably disposed in said chamber, reciprocating the piston means in said chamber with sequential reverse magnetic force to move blood into and out of said first and second sections of said chamber, allowing a limited amount of blood of flow around the piston means during movement thereof in said chamber, controlling the flow of blood into and out of the first section of the chamber in response to movement of the piston means in said chamber, and controlling the flow of blood into and out of the second section of the chamber in response to movement of the piston means in said chamber.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
12. An apparatus for pumping blood comprising:
- rigid means having a cylindrical wall surrounding a chamber, said means having an inlet port and an outlet port at each end thereof, check valve means associated with said inlet and outlet ports for controlling the flow of blood through said ports, and electric coils associated with said rigid means for creating a magnetic field when current flows through said coils, piston means located within said chamber, said piston means being movable therein, said piston means having characteristics such that the piston means is attracted by the magnetic field resulting from the current flowing through the electric coils whereby the magnetic field moves the piston means in the chamber, said piston means having an outside diameter being significantly less than the inside diameter of the cylindrical chamber so as to foster at least some reverse flow of blood around said piston means during movement of the piston means in said chamber to promote the washing of the cylindrical wall and the piston means, and electrical means for passing current alternately through said electric coils so as to cause the piston means to reciprocate between the ends of the chamber.
- View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
-
20. An apparatus for pumping blood comprising:
- a body having an inside wall surrounding a chamber for accommodating blood, means having inlet and outlet passages in communication with opposite ends of the chamber, a plurality of longitudinally extended ribs on said wall, said ribs extended into the chamber, one-way inlet valve means operable to allow blood to flow through the inlet passages into the opposite ends of the chamber and restrict the flow of blood out of the opposite ends of the chamber, one-way outlet valve means operable to allow blood to flow through the outlet passages out of the opposite ends of the chamber and restrict the flow of blood into the opposite ends of the chamber, movable piston means located in the chamber, said piston means being engageable with the ribs to space the piston means from the wall whereby a limited amount of blood flows around the piston means when the piston means moves in the chamber, solenoid means associated with said body for establishing sequential reverse magnetic force, and control means connected to the solenoid means operable to provide electric energy to energize the solenoid means whereby the sequential reverse magnetic force acting on the piston means moves the piston means in a manner to move blood into and out of the opposite ends of said chamber.
- View Dependent Claims (21, 22, 23, 24, 25, 26)
Specification