Patent ID: 6116107
Filing Date: 2000-09-12
Classification: F16H,Y10S,Y10T

Abstract:
A piezo nut positioner assembly for a lead screw piezo nut positioning device, said assembly comprising:(a) a tubular casing having a pair of opposite ends and a central cavity extending between the opposite ends;(b) a pair of end fittings each connected to one of said opposite ends of said tubular casing and having an opening defined in communication with said central cavity; and(c) a piezoelectric body disposed within said central cavity of said tubular casing between said end fittings and having a longitudinal passage defined in communication with said openings of said end fittings, said openings of said end fittings and said longitudinal passage of said piezoelectric body receiving a lead screw therethrough and being threadless such that said end fittings and piezoelectric body are not directly drivingly engaged by the lead screw, said assembly being electrically activatable in response to an electrical signal applied to said piezoelectric body to undergo axial expansion along a longitudinal rotational axis of the lead screw as to produce a fine adjustment corresponding to said axial expansion.