US 7,597,168 B2
Low engine speed steering performance
Eric R. Anderson, Galena, Ill. (US); Benjamin Nedved, Asbury, Iowa (US); Jarko Malinen, Ylämylly (Finland); and Daniel L. Pflieger, East Dubuque, Ill. (US)
Assigned to Deere & Company, Moline, Ill. (US)
Filed on May 23, 2006, as Appl. No. 11/438,828.
Claims priority of provisional application 60/719912, filed on Sep. 23, 2005.
Prior Publication US 2007/0068724 A1, Mar. 29, 2007
Int. Cl. B60K 17/354 (2006.01); B60K 17/344 (2006.01); F16D 31/02 (2006.01)
U.S. Cl. 180—247  [180/418; 180/233; 180/248; 180/197; 701/69; 60/428; 60/486; 60/403] 21 Claims
OG exemplary drawing
 
1. A vehicle comprising:
an articulated frame having a front portion and a rear portion;
a plurality of traction devices configured to propel the frame on the ground;
a steering assembly including a hydraulic steering actuator operably coupled to the front portion and the rear portion of the frame;
a loader assembly including a hydraulic loader actuator supported by the frame;
a priority pump in fluid communication with the steering assembly;
a first compensator valve in fluid communication with the priority pump;
a second compensator valve in fluid communication with the priority pump and coupled in parallel with the first compensator valve; and
wherein the first compensator valve and the second compensator valve are configured to provide fluid flow from the priority pump to the loader assembly only when the pressure of the fluid discharged from the priority pump exceeds a predetermined value.