Patent ID: 8323007
Filing Date: 2012-12-04
Classification: A61M

Abstract:
1. A fluid pump comprising: a drive unit comprising a housing and a plurality of actuators each configured to move between at least a respective first and a respective second position, wherein the plurality of actuators are coaxially nested and are generally conical in shape with first ends and second ends that are larger in dimension than the first ends, wherein a first actuator of the plurality of actuators is at least partially within a second actuator of the plurality of actuators and the first end of the first actuator is smaller in dimension that the first end of the second actuator; and a driven unit comprising a housing, a fluid path leading from a fluid inlet to a fluid outlet, and at least one driven membrane defining a portion of the fluid path, the driven unit configured to be selectively coupled to the drive unit so that a portion of the driven membrane is coupled to each of the plurality of actuators, whereby movement of at least one of the plurality of actuators effectuates movement of the driven membrane, causing fluid to be pumped through the driven unit from the fluid inlet to the fluid outlet, wherein the first ends of the plurality of actuators are proximate to the driven unit.