SELF-LEVELLING BOOM ARRANGEMENT FOR AN AGRICULTURAL MATERIAL DISTRIBUTION DEVICE

摘要

"SELF-LEVELLING BOOM ARRANGEMENT FOR AN AGRICULTURALMATERIAL DISTRIBUTION DEVICE"ABSTRACT OF THE DISCLOSUREA self-levelling boom arrangement for supporting upona frame of an agricultural material distribution deviceincludes a pair of boom arms extending outwardly from a cen-tral support beam. The boom arms are pivotally mounted-ona single horizontal pin on the beam for raising and loweringin a vertical plane. The beam is pivotally mounted at a lowerend so that the pin can move side to side in the verticalplane. Hydraulic rams are connected to the arms at positionsspaced outwardly of the central pin for raising and loweringthe arms relative to the frame. Thus, the arms can be raisedand lowered independently while the central beam provides aself-levelling effect.