Ball screw actuator for aircraft control surfaces

Details Ball screw actuator for aircraft control surfaces Ball screw actuator for aircraft control surfaces

2005-02-08

2005-02-08

Barefoot, Galen (Department: 3644)

Aeronautics and astronautics

Aircraft control

Reexamination Certificate

active

06851648

ABSTRACT:
A ball screw actuator for aircraft control surfaces includes a lead screw, a motor to set the screw in rotation about its longitudinal axis and a primary body connected to a control surface and engaged on the control screw via a plurality of balls movable on the thread of the screw. A secondary body is connected to the primary body and has an auxiliary portion provided with an engagement surface facing the thread of the lead screw at a predetermined distance; the engagement surface is shaped to engage on the thread of the lead screw. The actuator also includes a device for uncoupling the secondary body from the auxiliary portion in the rotation motion about the longitudinal axis.

REFERENCES:
patent: 2447439 (1948-08-01), Thompson
patent: 3467363 (1969-09-01), Reichel
patent: 3630328 (1971-12-01), Nelson
patent: 5178030 (1993-01-01), Bousquet
patent: 5467661 (1995-11-01), Lange
patent: 6672540 (2004-01-01), Shaheen et al.
patent: 6685382 (2004-02-01), Capewell et al.
patent: 20030029258 (2003-02-01), Davies et al.

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