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:
Apr. 24, 2001
Filed:
Apr. 17, 2000
Siegfried Zenker, Kirchseeon, DE;
Carsten Christensen, Broager, DK;
Thorkild Christensen, Sønderborg, DK;
Danfoss Fluid Power A/S, Nordborg, DK;
Abstract
A hydraulic valve arrangement with locking and floating function, with a control valve (,), which, for two operating positions (,) connects one motor connection (A) with a pump connection and a second motor connection (B) with a tank connection and vice versa, in a floating position (,) connects both motor connections (A, B) with the tank connection and in a locking position (,) separates both motor connections (A, B) from the pump and tank connections. Further, there are two closing valves (,), each being connected between the control valve (,) and a motor connection (A, B) and each having a piston loaded by a spring and limiting a spring chamber, the spring chambers being pressure releasable. Characteristic of this valve arrangement is that lifting valves (,) are provided for the pressure release, which valves are operated by a control pressure depending on the position of the control valve (,). This improves the operating reliability.