| 摘要 |
A pump has a housing that is divided into two chambers by an element that is driven in a push-pull manner so that the volumes of each of the two chambers are alternately enlarged and reduced. Both chambers are in the path of fluid through the pump. The chambers of a diaphragm pump in a preferred embodiment are defined by a piston with a hollow annular shape having a magnetic rod secured at its center. The piston travels along the axis of the rod to seat against the conforming surfaces of a hollow housing. The chambers are isolated by a flexible annular diaphragm secured to the piston and a center line of the housing. When adapted as an artificial heart, both chambers fill with blood, one being connected between veins and the lungs, the other being connected between the lungs and arteries. |
