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. 14, 2008
Filed:
Mar. 31, 2005
Rabie E. Khalil, Dunlap, IL (US);
Xiaodong Huang, Peoria, IL (US);
Michael J. Mientus, Metamora, IL (US);
John James Krone, Peoria, IL (US);
Rabie E. Khalil, Dunlap, IL (US);
Xiaodong Huang, Peoria, IL (US);
Michael J. Mientus, Metamora, IL (US);
John James Krone, Peoria, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A hydraulic steering system for a work machine may include a first steering actuator having a first and a second chamber. In addition, the steering system may include a second steering actuator having a third and a fourth chamber. A multi-position directional valve may include at least one low power position and at least one high power position. The low power position may be configured to direct fluid only to the first chamber during a low power turn to extend the first steering actuator. The high power position may be configured to direct fluid to the first chamber and the third chamber during a high power turn to retract the second steering actuator.