Patent ID: 9316237
Filing Date: 2016-04-19
CPC Classification: F15B,F16K

Claim Text:
1. A system comprising: a hydraulically-driven actuator having one of a rotor or a linear piston, and ports for hydraulic fluid to move the rotor or linear piston in either of two directions to different positions; an electro-mechanical sensor enabled to sense position of the rotor or linear piston; a valve having a valve body with a cylindrical bore of a first diameter having a central axis, the valve comprising a plug having one or more solid cylindrical portions of the first diameter engaged rotatably in the bore, individual ones of the solid cylindrical portions having one or more cross bores at right angles to an axis of the plug and through the cylindrical portion with openings at opposite ends of the cross bores, the openings at opposite ends of the cross bores aligning with openings of passages within the valve body communicating with individual ones of a plurality of inlet and outlet ports to and from the valve body, depending on relative position of the plug in the bore of the valve body; a servo motor coupled mechanically to the plug in a manner to rotate the plug around the central axis to different positions to align the openings of individual ones of the cross bores with the openings of individual ones of the passages in the valve body communicating with individual ones of the ports; and a programmable controller coupled to the electro-mechanical sensor and to the servo motor, the controller enabled to control the servo motor to accomplish programmed movement and position of the rotor or linear piston of the hydraulically-driven actuator.