Patent ID: 7028714

Claim:
A servo hydraulic flow control valve assembly comprising: an oil distribution board having inlet and outlet ends disposed in open communication through a main passage extending therebetween, the oil distribution board including a first manifold defined to branch from the main passage near the inlet end of the oil distribution board and a second manifold defined to branch from the main passage near the outlet end of the oil distribution board; a relief valve secured on the oil distribution board, the relief valve including a body positioned on the oil distribution board and a rated control device mounted to the body for selectively opening the first manifold; and a servo control device secured on the oil distribution board, the servo control device including a controller rotatably received in the oil distribution board to extend transversely across the second manifold, the controller having a transaxial passage defined to communicate with the second manifold when selectively aligned therewith, and a control unit secured on the oil distribution board for driving the controller to control the pressure and the flow rate in the second manifold.