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. 12, 2009
Filed:
Nov. 23, 2005
Marcus Bitter, Contwig, DE;
Marcus Bitter, Contwig, DE;
Deere & Company, Moline, IL (US);
Abstract
A hydraulic system for a suspension system is disclosed. The system has a hydraulic cylinder, a hydraulic tank, a conveying means, a hydraulic accumulator, a control device, a load holding device disposed between the hydraulic accumulator and the hydraulic cylinder, and an on-off valve disposed between the hydraulic accumulator and the control device. In order to provide a suspension function for the hydraulic cylinder while simultaneously ensuring safeguarding of the hydraulic cylinder and of the hydraulic accumulator against a pressure drop in the case of a tube break, the present invention provides a system that controls the on-off valve and the load holding device synchronously through a control pressure device, such that when the suspension function is activated the load holding device is opened and the on-off valve is closed.