HYDRAULIC CONTROL VALVE HAVING INTEGRATED CHECK VALVE
First Claim
Patent Images
1. A control valve for controlling hydraulic fluid flows, comprising:
- a hollow valve housing having at least one inlet connection, at least two working connections and at least one outlet connection;
a control piston, which is guided so that the control piston is axially displaceable inside the valve housing and which serves to connect the inlet connection to either working connection via at least a first hydraulic fluid line as a function of position, while the other working connection is connected to the outlet connection via at least a second hydraulic fluid line;
at least one hydraulically openable check valve opening the first hydraulic fluid line in an inlet direction and having a closing element, which serves for closing a valve aperture,wherein the closing element is provided with at least one perforation, such that a sealing part, resiliently supported by at least one flexible tongue, is formed for sealing of the valve aperture.
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Accused Products
Abstract
A hydraulic control valve for controlling pressurizing medium flows, which has a hydraulically unlockable cheek valve that includes a closing element by which a valve opening can be closed. The closing element is equipped with at least one through-hole such that a locking part that is spring-loaded via at least one flexible tongue is formed for locking the valve opening.
22 Citations
15 Claims
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1. A control valve for controlling hydraulic fluid flows, comprising:
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a hollow valve housing having at least one inlet connection, at least two working connections and at least one outlet connection; a control piston, which is guided so that the control piston is axially displaceable inside the valve housing and which serves to connect the inlet connection to either working connection via at least a first hydraulic fluid line as a function of position, while the other working connection is connected to the outlet connection via at least a second hydraulic fluid line; at least one hydraulically openable check valve opening the first hydraulic fluid line in an inlet direction and having a closing element, which serves for closing a valve aperture, wherein the closing element is provided with at least one perforation, such that a sealing part, resiliently supported by at least one flexible tongue, is formed for sealing of the valve aperture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification