Patent ID: 6123426
Filing Date: 2000-09-26
Classification: F16H,Y10T

Abstract:
A linear actuator, comprising:a frame having a frame bore therein, the frame bore being threaded with an internal coarse thread;an antijam nut having an external coarse thread engaged to the internal coarse thread of the frame bore within the frame bore, the antijam nut further having a nut bore therethrough internally threaded with a fine thread, an axis of the nut bore being coincident with an axis of turning of the antijam nut on the coarse threads;a first antijam nut endstop affixed to the frame such that the antijam nut contacts the first antijam nut endstop at a first range limit within the frame bore;a leadscrew having at least a portion thereof externally threaded with the fine thread and engaged to the internal fine thread of the antijam nut;a leadscrew support engaged to the leadscrew; anda rotational drive operably connected to the leadscrew,the frame and the leadscrew support being linearly movable relative to each other.