Blood pump tube element

Claim 1

A Blood Pump Tube Element including: A. a sequential plurality of resilient bag-like chambers wherein each chamber has one outlet comprising a single hole in the surface of the chamber and each chamber surface opposite to the outlet has a plurality of holes for forming an inlet; including resilient spherical balls for closing each said single hole outlet even when the balls are deformed due to side pressures since the chambers will follow the same deformation and metallic helical springs for biasing the balls against the walls of the bag-like chambers containing the outlet holes and for displacing the walls inwardly to secure more closing contact area around the balls when side pressures are applied to the balls; and wherein the plurality of said chambers being fused together so as to connect the outlet and inlet surfaces of consecutive chambers; said spring-biased balls, located inside cavities formed by chamber surfaces containing the consecutive outlet and inlet holes, acting as separating valves between the bag-like chambers, B. an outer resilient tube about the said sequential plurality of bag-like chambers fused at spots to the plurality of bag-like chambers, and C. rollers mounted at ends of arms fixed about a shaft driven by an electric motor; said rollers contacting the outer tube; said arms being provided with longitudinal slots to carry position-adjustable attachment means for the rollers, thereby enabling the adjustment of side pressure or the amount of fluid to pass through the bag-like chambers.