Patent ID: 7857070

Claim:
A control system for a construction apparatus including a hydraulic pump adapted to supply hydraulic fluid to a plurality of hydraulically actuated functions, the control system comprising: a proportional valve adapted to selectively control a flow of pressurized hydraulic fluid from the hydraulic pump; a plurality of directional valves in communication with the proportional valve and the plurality of hydraulically actuated functions, the directional valves configured to selectively direct the pressurized hydraulic fluid from the proportional valve to at least one of the hydraulically actuated functions, wherein the proportional valve includes a first outlet directing pressurized fluid to a first of the plurality of directional valves and a second outlet directing pressurized fluid to a second of the plurality of directional valves; a first input adapted to actuate the proportional valve to control the flow of hydraulic fluid from the pump to the plurality of directional valves; and a second input adapted to actuate at least one of the plurality of directional valves to supply hydraulic fluid to a corresponding hydraulically actuated function.