Patent ID: 8683795

Claim:
An apparatus comprising: a housing; a plurality of ports on the housing; a valve system located inside the housing in which the valve system is configured to be in a closed state when an absence of a selected level of pressure is present at all of the plurality of ports and in an open state when the selected level of pressure is present at any of the plurality of ports, wherein the housing, the plurality of ports, and the valve system comprises a number of flow valves biased to block the plurality of ports when the selected level of pressure is absent at the all of the plurality of ports, and wherein the valve system further comprises a number of one way valves in which each of the number of one way valves is associated with a port in the plurality of ports and a cavity in the housing, wherein the each of the number of one way valves is configured to pass a fluid from a corresponding port into the cavity to generate a pressure, in which the pressure moves the number of flow valves into the open state when the selected level of pressure is present at the any of the plurality of ports; a controller; and a motor configured to move a boom between a retracted position and an extended position, wherein the valve is connected to the controller and the motor.