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:
Jan. 23, 2007
Filed:
Feb. 11, 2005
Eric Richard Anderson, Galena, IL (US);
Russell Arthur Schneidewind, Chicago, IL (US);
William Daniel Robinson, Epworth, IA (US);
Daniel Lawrence Pflieger, East Dubuque, IL (US);
Daniel Warren Williams, Dubuque, IA (US);
Eric Richard Anderson, Galena, IL (US);
Russell Arthur Schneidewind, Chicago, IL (US);
William Daniel Robinson, Epworth, IA (US);
Daniel Lawrence Pflieger, East Dubuque, IL (US);
Daniel Warren Williams, Dubuque, IA (US);
Deere & Company, Moline, IL (US);
Abstract
A system and method of achieving ride control for a work vehicle that replaces a traditional accumulator with a ride control valve, a directional control valve and a fluid pressure source. The fluid pressure source may be a variable displacement hydraulic pump. The ride control valve is set to a first relief pressure that allows fluid to flow from the head end of a hydraulic cylinder when the loading on the cylinder, i.e., the pressure in the head end is equal to or greater than the first relief pressure. A work tool of the vehicle falls from a first position to a second position when fluid flows from the head end. The ride control valve is then reset to a second relief pressure, higher than the first relief pressure and sufficient to move the work tool toward the first position. Afterwards, the directional control valve is opened long enough to allow fluid from the fluid pressure source to enter the head end and move the work tool back to approximately the first position. The ride control valve may be dynamically adjusted.