Patent ID: 8870865

Claim:
A medical device for penetrating living being tissue, said device comprising: a penetrating member which is vibrated to reduce force needed to penetrate living being tissue; a driving actuator coupled to said penetrating member and causing said vibration when energized; and an electrical power cut off automatically de-energizing said medical device when said penetrating member has passed through said living being tissue, wherein said driving actuator comprises: a distal end coupled to said penetrating member; a first channel extending to said distal end; at least one piezoelectric element for converting electrical energy into oscillatory motion when energized, wherein a third channel extends through said at least one piezoelectric element such that said at least one piezoelectric element is disposed circumferentially completely around a length of said third channel; and a second channel having a first end in communication with said first channel and a second end positioned at an exterior surface of said actuator, and wherein said distal end and said penetrating member are displaced in oscillatory motion when said at least one piezoelectric element is energized.