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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 12716432 B1

PDFFull Text
Date of Patent:
Aug. 25, 2026

Filed:

Feb. 08, 2024

Method for real-time hydraulic cylinder drift monitoring

Applicant:

Caterpillar Inc., Peoria, IL (US);

Inventors:

Richard Andrew Carpenter, Chillicothe, IL (US);

Wajahat Afsar, Dunlap, IL (US);

Aravind Stalin, Peoria, IL (US);

Vinay Kumar Rao Veeramaneni, Peoria, IL (US);

Assignee:

Caterpillar Inc., Peoria, IL (US);

Attorney:
Primary Examiner:

Ryan D Walsh

Int. Cl.
CPC ...
F15B 19/00 (2006.01); E02F 9/22 (2006.01); E02F 9/26 (2006.01); F15B 15/20 (2006.01); F15B 15/28 (2006.01); F15B 21/00 (2006.01); G08B 21/18 (2006.01);
U.S. Cl.
CPC ...
F15B 19/00 (2013.01); E02F 9/226 (2013.01); E02F 9/2271 (2013.01); E02F 9/267 (2013.01); F15B 15/20 (2013.01); F15B 19/005 (2013.01); F15B 21/008 (2013.01); G08B 21/182 (2013.01); F15B 15/28 (2013.01); F15B 2211/6313 (2013.01); F15B 2211/6336 (2013.01); F15B 2211/7053 (2013.01); F15B 2211/857 (2013.01);
Abstract

A method of monitoring drift in a hydraulic cylinder, including providing a work machine having an implement actuated by the hydraulic cylinder, a sensor attached to the hydraulic cylinder configured to measure a displacement of the hydraulic cylinder and a controller; identifying a cycle start of the hydraulic cylinder; identifying a cycle end of the hydraulic cylinder; calculating a drift rate of the hydraulic cylinder; determining if the drift rate is greater than a drift threshold; and if the drift rate is greater than the drift threshold, notifying service personnel that service of the hydraulic cylinder is required.

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