Back to results
US 12,540,659 B2Granted
Screw actuators
AssigneeRatier-Figeac SAS
InventorEtienne Pluchon
Life of this patent
Estimating the term…
Abstract
A screw actuator includes a primary ball nut, a secondary nut, and a ball screw. The primary ball nut and secondary nut are both in threaded engagement with the ball screw, in which the inner functional plays of the screw actuator are configured such that in normal operation the threads of the secondary nut are in contact with the ball screw threads.
Claims16
A screw actuator comprising:
- a primary ball nut;
- a secondary nut;
- and
- a ball screw;
- wherein the actuator operates in a normal operating condition where the primary ball nut is loaded and the secondary nut is unloaded and a failure condition where the secondary nut is loaded;
- wherein the primary ball nut and secondary nut are both in threaded engagement with the ball screw;
- wherein inner functional plays of the screw actuator are configured such that in the normal operating condition the threads of the secondary nut are in contact with the ball screw.
4 more elements
Dependencies are inferred from the claim text.