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.:
Date of Patent:
Oct. 16, 2018
Filed:
Aug. 12, 2016
Caterpillar Inc., Peoria, IL (US);
Mark P. Vonderwell, Franklin, WI (US);
Douglas W. Seeger, Franksville, WI (US);
Christopher A. Williamson, Greendale, WI (US);
Caterpillar Inc., Deerfield, IL (US);
Abstract
A system and method for controlling the swing of a machine is disclosed. The system may comprise a hydrostatic circuit that includes an electronic displacement control pump and a first swing motor fluidly connected in a closed loop circuit. The electronic displacement control pump configured to control the supply of fluid to the swing motor based on a final pump displacement command. The first swing motor configured to rotate the upper carriage of the machine. The hydrostatic circuit configured to control (a) an actual speed of the first swing motor when the final pump displacement command results from a requested swing motor speed and (b) a torque of the first swing motor when the final pump displacement command results from a requested swing motor torque.