Patent ID: 6938415

Claim:
An actuation system for hydraulic systems in a common hydraulic circuit comprising in combination: a) a first hydraulic driven component having a bidirectional driven element with at least two mechanical end points limiting, arresting and stopping further mechanical movement of the bidirectional element for inherently providing an increase in hydraulic pressure in the hydraulic circuit upon being hydraulically driven against a mechanical end point; b) a second hydraulically driven component having a bidirectional driven element with at least two mechanical end points limiting, arresting and stopping further mechanical movement of its bidirectional driven element for inherently providing an increase in hydraulic pressure in the hydraulic circuit upon being hydraulically driven against a mechanical end point; c) a source of reversible hydraulic power including a motor driving a pump pumping a hydraulic liquid from a containing reservoir for supplying hydraulic liquid at least at a pre-set pressure (P a ) in a forward and a reverse direction; d) a first hydraulic power supply/return line connected between the source of hydraulic power and the first hydraulic driven component between one of the two mechanical end points and its bidirectional driven element; e) a first vent sequence valve in a second hydraulic power supply/return line connected between the source of hydraulic power and the second hydraulic driven component between one of its two mechanical end points and its bidirectional driven element; f) a third hydraulic power supply/return line connected between the source of hydraulic power and the second hydraulic driven component between other of the two mechanical end points and its bidirectional driven element, completing the common hydraulic circuit including the first and second hydraulic driven components and the source of hydraulic power; g) a pressure switch monitoring pressure of the hydraulic liquid pumped from the source of hydraulic power for turning off the source of hydraulic power at a pre-set pressure level (P off ); forward hydraulic power being supplied to the first hydraulic driven component for driving it's bidirectional element to one of its mechanical end points via the first hydraulic power supply/return line generating a first pressure increase (P b ) in the first and second supply/return lines switching the first vent sequence valve to supply hydraulic power to the second hydraulically driven component for driving its bidirectional element to one of its mechanical end points generating a second pressure level P c in the second supply/return line, where P a <P b <P off ≦P c shutting off the system.