Patent ID: 9014818
Filing Date: 2015-04-21
Classification: A61N

Abstract:
1. An autonomous intracorporeal leadless capsule, comprising: a capsule body having an exterior and an interior; an electronic circuit disposed in said interior and an energy harvesting circuit disposed in said interior; a transducer for energy harvesting, for converting an external physical effect applied to the capsule body into an electrical charge, the transducer comprising: an energy storage and management circuit, powered by the energy harvester transducer in response to a reduction and/or an increase of the dielectric gap of the capacitor, wherein said deformable surface is coupled to the first capacitor electrode by a mechanical high-pass filter, wherein the mechanical high-pass filter comprises a piston having a rod coupled to at least one moveable surface of the capacitor, wherein the piston is enclosed within a fluid-filled chamber that is fixed to and moveable with the deformable surface with respect to at least the capsule body and piston, the rod extending from the piston out of the fluid-filled chamber to the at least one moveable surface of the capacitor, wherein the spaces within the fluid-filled chamber above and below the piston are coupled via a calibrated clearance between the piston and inner surface of the fluid-filled chamber sized to restore pressure equilibrium during slow movements of the deformable surface but to transmit pressure changes to the piston, the rod, and the movable surface of the capacitor, and wherein displacement of the piston is not caused during low frequency displacement of the deformable member.