Patent ID: 7390294
Filing Date: 2008-06-24
Classification: A61F

Abstract:
1. An implantable device, comprising: an accumulator operably configured for selective movement between a first volume and a second volume, wherein the accumulator comprises a movable portion having a movable member; a piezoelectric driver coupled to the accumulator and operably configured to selectively actuate the accumulator between the first volume and the second volume, wherein the piezoelectric driver is operable to drive the movable member from a first position to a second position to provide the first volume within the accumulator, wherein the piezoelectric driver is further operable to drive the movable member from the second position to the first position to provide the second volume within the accumulator; a controller operably configured to control the piezoelectric driver; and a case, wherein the accumulator includes a stationary portion coupled to the case and a movable portion, the piezoelectric driver being coupled between the case and the movable portion of the accumulator, wherein the movable portion includes a levered coupling to the case, the piezoelectric driver comprising a piezoelectric actuator coupled between the lever and the case and operably configured to impart a motion to the levered coupling.