Patent ID: 8231639
Filing Date: 2012-07-31
Classification: A61B,A61F

Abstract:
1. A motor-driven tool for applying an implantation force to a helical fastener sized and configured for penetration in tissue comprising: a tool body; a drive motor carried in the tool body; a driven member coupled to the drive motor, carried by the tool body and operable to apply the implantation force during operation of the drive motor; a carrier on the driven member configured to couple the fastener to the driven member to transfer the implantation force from the driven member to the fastener the carrier comprising a distal portion wherein the distal portion remains within the tool body during implantation of the fastener; and a motor control unit carried in the tool body, coupled to the drive motor, and conditioned to operate the drive motor in phases including: wherein after automatically entering the lull phase, the motor control unit requires a final phase command to advance from the lull phase to the final phase.