US 7,066,446 B2Granted

Hydraulic valve arrangement

AssigneeSauer-Danfoss ApS

InventorBrian Nielsen

Life of this patent

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Abstract

A hydraulic valve arrangement with a first and a second working connection, both working connections being connectable with a hydraulic consumer, a supply connection having a pressure connection and a tank connection, a first valve, which closes the pressure connection or connects it in a controlled manner with the first working connection or the second working connection, a second valve, which closes the tank connection or connects it in a controlled manner with the first or the second working connection, and a control device, which controls the first valve and the second valve. It is endeavored to enable a simple manner of exact controlling the consumer. For this purpose, at least one valve is provided with an opening degree sensor, which is connected with the control device, the control device controlling the valve arrangement in dependence of the signal from the opening degree sensor and a specified signal.

Claims16

Dependent claims

A hydraulic valve arrangement comprising:

a working connection arrangement having a first working connection and a second working connection, the first and the second working connections being connectable with a hydraulic consumer;
a supply connection arrangement having a pressure connection and a tank connection, a first valve arrangement operable to accomplish at least one of closing the pressure connection and connecting the pressure connection in a controlled manner with one of the first working connection and the second working connection, a second valve arrangement, operable to accomplish at least one of closing the tank connection and connecting the tank connection in a controlled manner with at least one of the first working connection and the second working connection, and a control device, which controls the first valve arrangement and the second valve arrangement, being at least one of the valve arrangements being provided with an opening degree sensor, connected with the control device, and wherein the control device controls the valve arrangement in dependence on the signal received from the opening degree sensor and a specified signal (PS, VS).

Dependencies are inferred from the claim text.

Facts

Application: 10/945,333Filed 20 Sep 2004
Priority: DE 103 44 48024 Sep 2003
Published: US 2005/0072954 A17 Apr 2005
Granted: 27 Jun 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

F15B 13/0433
With electrically-controlled pilot valves: the pilot valves being pressure control valves
F15B 11/042
For controlling the speed: by means in the feed line
F15B 11/044
For controlling the speed: by means in the return line
F15B 21/08
Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass:…