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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 11499294 B1

PDFFull Text
Date of Patent:
Nov. 15, 2022

Filed:

Aug. 25, 2020

Work vehicle magnetorheological fluid joystick systems operable in modified joystick stiffness modes

Applicant:

Deere & Company, Moline, IL (US);

Inventors:

Alex R. Vandegrift, Dubuque, IA (US);

Craig Christofferson, Dubuque, IA (US);

Amy K. Jones, Asbury, IA (US);

Anthony K. Kraft, Epworth, IA (US);

Brett S. Graham, Dubuque, IA (US);

Christopher R. Benson, Asbury, IA (US);

Christopher J. Meyer, Dubuque, IA (US);

Kenneth Franck, Dubuque, IA (US);

Mark D. Anderson, Dubuque, IA (US);

Todd F. Velde, Dubuque, IA (US);

Assignee:

DEERE & COMPANY, Moline, IL (US);

Attorney:

Klintworth & Rozenblat IP LLP

Primary Examiner:

Adam D Rogers

Int. Cl.
CPC ...
E02F 9/20 (2006.01); G05G 1/04 (2006.01); G05G 9/02 (2006.01); G05G 5/03 (2008.04); G05G 9/047 (2006.01); E02F 9/26 (2006.01); G05G 5/12 (2006.01); G05G 5/02 (2006.01); F16F 9/53 (2006.01); G06F 3/01 (2006.01); E02F 9/24 (2006.01); G05G 1/015 (2008.04); F15B 13/01 (2006.01); G05G 5/05 (2006.01); E02F 3/32 (2006.01); E02F 3/76 (2006.01);
U.S. Cl.
CPC ...
E02F 9/2004 (2013.01); E02F 9/2012 (2013.01); E02F 9/2029 (2013.01); E02F 9/24 (2013.01); E02F 9/265 (2013.01); F15B 13/01 (2013.01); F16F 9/535 (2013.01); G05G 1/015 (2013.01); G05G 1/04 (2013.01); G05G 5/02 (2013.01); G05G 5/03 (2013.01); G05G 5/05 (2013.01); G05G 5/12 (2013.01); G05G 9/047 (2013.01); G06F 3/016 (2013.01); E02F 3/32 (2013.01); E02F 3/7609 (2013.01); E02F 3/7636 (2013.01); E02F 9/261 (2013.01); G05G 2009/04751 (2013.01); G05G 2009/04766 (2013.01); G05G 2505/00 (2013.01);
Abstract

Embodiments of a work vehicle magnetorheological fluid (MRF) joystick system include a joystick device having a base housing, a joystick movably mounted to the base housing, and a joystick position sensor configured to monitor joystick movement. An MRF joystick resistance mechanism is controllable to vary a joystick stiffness resisting movement of the joystick relative to the base housing, while a controller architecture is coupled to the joystick position sensor and to the MRF joystick resistance mechanism. The controller architecture is configured to: (i) selectively place the work vehicle MRF joystick system in a modified joystick stiffness mode during operation of the work vehicle; and (ii) when the work vehicle MRF joystick system is placed in the modified joystick stiffness mode, command the MRF joystick resistance mechanism to vary the joystick stiffness based, at least in part, on the movement of the joystick relative to the base housing.

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