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US 2024/0337278 A1Published application
Hydraulic cartridge valve with position monitoring mechanism and hydraulic control system and method
AssigneeHydraForce, Inc.
InventorsTravis Schmidt, David Ruxton, Thomas Ptak, Scott Wickboldt
Life of this patent
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Abstract
A hydraulic cartridge valve includes a movable member and a position monitoring mechanism configured to detect the position of the movable member. The position monitoring mechanism is adapted to generate a position signal indicative of the position of the movable member. The position monitoring mechanism can be in the form of a linear variable differential transformer (LVDT).
Claims21
A hydraulic cartridge valve comprising:
- a valve body defining an internal valve cavity;
- a movable member axially movable over a range of travel with respect to the valve body, the movable member at least partially disposed within the internal valve cavity over the range of travel;
- a position monitoring mechanism arranged with the movable member and configured to detect a position of the movable member over the range of travel and to transmit a position signal indicative of the position of the movable member detected by the position monitoring mechanism.
A hydraulic control system comprising:
- a controller;
- a hydraulic cartridge valve in operable arrangement with the controller, the hydraulic cartridge valve including:
- a valve body defining an internal valve cavity,
- a movable member axially movable over a range of travel with respect to the valve body, the movable member at least partially disposed within the internal valve cavity over the range of travel,
- an actuator arranged with the movable member and configured to selectively move the movable member over the range of travel, and
- a position monitoring mechanism arranged with the movable member and configured to detect a position of the movable member over the range of travel and to transmit to the controller a position signal indicative of the position of the movable member detected by the position monitoring mechanism;
- and
- wherein the controller is configured to control the actuator to adjust the position of the movable member in response to the position signal received from the position monitoring mechanism.
5 more elements
A method of controlling a hydraulic cartridge valve, the method comprising:
- transmitting, by a position monitoring mechanism of a hydraulic cartridge valve, a position signal to a controller, the position signal indicative of a position detected by the position monitoring mechanism of a movable member of the hydraulic cartridge valve, the movable member axially movable over a range of travel with respect to a valve body of the hydraulic cartridge valve;
- monitoring, by the controller, the position signal to determine whether the movable member is detected to be at a desired set point;
- selectively operating, by the controller and based upon the position signal, an actuator of the hydraulic cartridge valve to axially move the position of the movable member to the desired set point.
Dependencies are inferred from the claim text.