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US 2005/0029484 A1Published application
Valve block for a control device, particularly for a hydrostatic machine
AssigneeBrueninghaus Hydromatik GmbH
InventorRoland Belser
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AssigneeBrueninghaus Hydromatik GmbH
InventorRoland Belser
Estimating the term…
The invention relates to a valve block (1) for a control device comprising a valve (9) whose valve piston (14) is subjected to the action of a control pressure when in its open position and to the action of a return spring (15) when in its closed position. The closing force of the return spring (15) can be decreased or increased by an actuator, which can be displaced toward a position that increases the closing force and one that decreases the closing force. In order to simplify the displacement or adjustment and to improve reliability, the displacing movement of the actuator (16a) in the direction of movement that increases the closing force of the return spring (15) is limited by a stop element (112) in a position in which the closing force of the return spring (15) reaches its limited maximum value.
Valve block (1) for a control device, in particular for a hydrostatic machine, comprising a valve (9) the valve piston (14) of which is subjected to the action of a control pressure when in its open position and to the action of a return spring (18) when in its closed position, the closing force of the return spring (15) being able to be reduced or increased by means of an actuator (16a) which can be displaced towards a position which increases the closing force and a position which reduces the closing force, characterised in that the displacing movement of the actuator (16a) in the direction of movement which increases the closing force of the return spring (15) is limited by a stop element (112) in a position in which the closing force of the return spring (15) reaches its limited maximum value.
Valve block according to any one of the preceding claims, characterised in that the stop element (112) and the actuator (16a) are arranged in an add-on part (84) of the valve block (1).
Valve block according to any one of the preceding claims, characterised in that the valve is a pressure control valve (9), e.g. a pressure limiting valve, or a delivery flow control valve (11).
Dependencies are inferred from the claim text.