Patent ID: 7238165

Claim:
A pump for pumping a fluid comprising: at least one linear electromagnetic motor; at least one pump drive head, coupled to said linear electromagnetic motor, said pump drive head configured for movement in a linear direction; at least one fluid housing, responsive to said linear movement of said at least one pump drive head, and defining a deformable fluid chamber configured to contain a fluid, said fluid housing including a first and at least a second port, wherein said first port is configured to allow said fluid to flow substantially into said deformable fluid chamber and said second port is configured to allow said fluid to flow substantially out of said deformable fluid chamber, wherein said pump drive head is configured to deform said deformable fluid chamber causing a pressure differential within said deformable fluid chamber thus changing the volume of said deformable fluid chamber and forcing said fluid in or out said deformable fluid chamber through said first and second ports respectively; and a controller, coupled to said at least one linear motor, and configured to apply an energizing current to said linear electromagnetic motor in a predetermined waveform based upon a maximum positive energizing current value (systole) setting established in said controller, a maximum negative energizing current value (diastole) setting established in said controller, a cycle rate setting established in said controller, and the ratio of maximum positive to maximum negative energizing current value established in said controller such that said controller is configured to cause a maximum volume of fluid for a given pressure at a predetermined time and target pressure to be displaced within said fluid chamber.