Patent ID: 9095368
Filing Date: 2015-08-04
Classification: A45D,A61B

Abstract:
1. A handpiece for follicular unit extraction comprising: a handpiece body extending along a generally central axis for holding a follicle punch having a cutting edge; a motor-driven driveshaft mounted within the handpiece body for rotation about the axis for rotating the follicular punch when said punch is held by the handpiece; a fluid path carried by the handpiece for conducting a fluid from a source external to the handpiece into the lumen of the follicle punch held by the handpiece for delivery of the fluid to the cutting edge of the follicle punch; an ejector pin positioned within the fluid path of the handpiece for axial movement from a retracted position to a deployed position within the follicle punch when the punch is held by the handpiece so as to eject an impacted graft or debris from the punch's interior; operator-controlled means for moving the pin axially between the retracted and deployed positions; an ejector piston positioned in the fluid path and having a distal end portion for moving the ejector pin from said retracted position to said deployed position, and further having a proximal face positioned upstream in said fluid path from said distal end portion and configured to be responsive to the force of flowing fluid in said fluid path; and a biasing component for preventing movement of the ejector piston when the force of the flowing fluid is less than an activating level.