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:
May. 18, 2010
Filed:
Sep. 06, 2007
Marcus Bitter, Mannheim, DE;
Richard Tudor, Zweibrücken, DE;
Marcus Bitter, Mannheim, DE;
Richard Tudor, Zweibrücken, DE;
Deere & Company, Moline, IL (US);
Abstract
A loader includes a hydraulically operated extension arm, a load sensor for monitoring the load condition on the loader and a hydraulic arrangement for actuation of the extension arm and/or an implement attached to the extension arm. The hydraulic arrangement exhibits at least one hydraulic cylinder with one supply line on the piston rod side and one supply line on the piston side. At least one hydraulically switchable control device is coupled between a source of fluid pressure and a hydraulic tank, on the one hand, and the supply lines on the other hand. An actuating device is coupled for routing control pressure to the control device via first and second control pressure lines. An electronic control unit is connected for effecting operation of a control pressure control device, which is coupled to at least one of the control pressure lines, in response to a load signal received from the load sensor so as to actuate the control device for achieving a slowed-down actuation of the hydraulic cylinder in conjunction with the onset of a critical load condition. Thus, a restriction of a volumetric flow is achieved in at least one of the supply lines coupled to the hydraulic cylinder.