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:
Dec. 25, 2012
Filed:
Jun. 16, 2011
Aaron R. Shatters, Montgomery, IL (US);
Steven C. Budde, Dunlap, IL (US);
John T. Reedy, Peoria, IL (US);
Robert E. Stone, Metamora, IL (US);
Aaron R. Shatters, Montgomery, IL (US);
Steven C. Budde, Dunlap, IL (US);
John T. Reedy, Peoria, IL (US);
Robert E. Stone, Metamora, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A hydraulic system for lifting a work tool of a mobile machine is disclosed. The hydraulic system may have a pump, a lift actuator, a lift valve arrangement, and a lift sensor configured to generate a first signal indicative of an actual lift velocity. The hydraulic system may also have a tilt actuator, a tilt valve arrangement, and at least one operator interface device movable to generate a second signal indicative of a desired lift velocity and a third signal indicative of desired tilt velocity. The hydraulic system may further have a controller configured to command the lift valve arrangement to meter pressurized based on the second signal, command the tilt valve arrangement to meter pressurized fluid based on the third signal, and command the tilt valve arrangement to meter pressurized fluid and maintain a desired tilt angle of the work tool during lifting based selectively on the first and second signals.