Patent ID: 8698373
Filing Date: 2014-04-15
Classification: A61F,F04B,H01L

Abstract:
1. A device for controlling a pump in an implantable gastric banding system, the device comprising: a positive terminal of a power source coupled via a first switch to a piezoelectric actuator; a negative terminal of the power source coupled via a second switch to the piezoelectric actuator, wherein the piezoelectric actuator is coupled to an inductor to facilitate charging and discharging the piezoelectric actuator; a first circuit comprising a first diode, a third switch, the inductor, and the piezoelectric actuator, wherein the piezoelectric actuator is operable to facilitate moving a fluid between a reservoir and an inflatable portion of a gastric band; a second circuit comprising a second diode, a fourth switch, the inductor, and the piezoelectric actuator, wherein the first diode and the second diode comprise opposite operational orientations to facilitate discharging the piezoelectric actuator and to facilitate energy recovery in the implantable gastric banding system; and a microcontroller operable to control the operation of at least one of the first switch, the second switch, the third switch, or the fourth switch, according to a dynamic algorithm to optimize the energy recovery of the implantable gastric banding system.