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SPACE PATENTS BY
Aerospace Assignees
Aerospace Inventors
Time Lines

Elevator variable feel unit

Invented by: Kwan-Ho Bae
Corona, CA

Hugh R. Parkes
Redmond, WA

Originally Assigned to: Rockwell Collins, Inc.
Cedar Rapids, IA
[Now assigned to . . .]

Issued:2009-07-14
Filed:2006-09-27
Application No:11528059
Examined by:Mansen; Michael R

An elevator variable feel unit for aircraft pilot control. The variable feel unit has a single cam and a roller unit. The cam attaches by a spline to the input shaft and input crank of the feel unit. The input crank, connected to the control column torque tube, turns the shaft and the cam. A cam follower arm assembly has a roller that causes a cam follower arm to pivot as the cam is pivoted due to movement of the control column. Two base feel centering springs between the cam follower arm and a fixed point to keep the roller on the cam, and provide the base feel force and a centering function. In a base feel position, the preload on the base feel spring keeps the variable feel unit in a detent position. The variable feel spring has a minimum preload and does not add to the feel at low airspeed. When the control column is moved, the movement causes an increase in the extension of the base feel springs, thus increasing the feel forces at the column. The feel at the control column increases with the amount of column movement. In this base feel configuration, the variable feel spring does not stretch throughout the full movement of the control column. As the airspeed increases, the elevator feel actuator extends to change the configuration of the feel mechanism in the feel unit, by rotating the variable feel arm up as the airspeed increases. When the control column is moved at higher airspeed, it causes an increase in the extension of the variable feel springs, as well as base feel springs. These two forces increase the feel forces at the control column. Increased rotation of the variable feel arm further causes additional extension of the variable feel spring, and thus the column force.

[pdf] U.S. Pat. No. 7,559,510

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This information is part of a study by Oasis Global, Inc. of all space inventions filed at the United States Patent and Trademark Office, and is provided for informational purposes only. It is not an endorsement of any particular assignee, inventor or invention. Although Peter A. Koziol represents inventors and assignees of space inventions he does not represent all of the inventors and assignees listed. The prosecuting attorney agent or firm for each patent is identified by the United States Patent and Trademark Office in the patent specfication, which can be viewed by clicking on the patent image or downloading the patent document. For more information regarding Mr. Koziol's background and experience, or to learn more about space inventions, please contact Mr. Koziol.

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