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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9683616 B1

PDFFull Text
Date of Patent:
Jun. 20, 2017

Filed:

Sep. 10, 2014

Magnetorheological rotorcraft actuator

Applicant:

Bell Helicopter Textron Inc., Fort Worth, TX (US);

Inventors:

Pasquale Spina, Laval, CA;

Carlos A Fenny, Arlington, TX (US);

Jean-Sebastian Plante, Sherbrooke, CA;

Assignee:

Bell Helicopter Textron Inc., Fort Worth, TX (US);

Attorney:
Primary Examiner:

Brian M O'Hara

Assistant Examiner:

Assres H Woldemaryam

Int. Cl.
CPC ...
F16D 37/00 (2006.01); B64C 27/56 (2006.01); B64C 27/64 (2006.01); B64C 27/68 (2006.01); B64C 27/12 (2006.01); B64C 27/78 (2006.01); B64D 35/02 (2006.01); F16D 37/02 (2006.01); B64C 13/28 (2006.01); B64C 27/605 (2006.01); B64C 27/08 (2006.01); B64D 35/04 (2006.01); F16D 27/14 (2006.01); B64D 31/14 (2006.01); F16H 25/20 (2006.01);
U.S. Cl.
CPC ...
F16D 37/008 (2013.01); B64C 13/28 (2013.01); B64C 27/08 (2013.01); B64C 27/12 (2013.01); B64C 27/56 (2013.01); B64C 27/605 (2013.01); B64C 27/64 (2013.01); B64C 27/68 (2013.01); B64C 27/78 (2013.01); B64D 31/14 (2013.01); B64D 35/02 (2013.01); B64D 35/04 (2013.01); F16D 27/14 (2013.01); F16D 37/02 (2013.01); F16D 2037/001 (2013.01); F16H 25/20 (2013.01); F16H 2025/2059 (2013.01); Y02T 50/44 (2013.01); Y10T 74/18704 (2015.01);
Abstract

In some embodiments, a rotorcraft flight control actuator includes a driving member configured to receive mechanical energy from a power source, a driven member, a magnetorheological (MR) fluid disposed between the driving member and the driven member and configured to transmit a variable amount of mechanical energy from the driving member to the driven member, an output member configured to be coupled between the driven member and a flight control device of a rotor system, and a magnetic circuit configured to deliver a magnetic field towards the MR fluid, the magnetic circuit configured to vary the strength of the magnetic field in response to inputs.

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