Patent ID: 7584732

Claim:
A shaft-mounted rocker arm arrangement comprising: a rocker arm comprising an elongate body portion and a curved arm portion having an arc greater than 180 degrees but less than 360 degrees, and nowhere 360 degrees; and a rocker shaft comprising flat portion configured to receive the curved arm portion of the rocker arm during assembly of the rocker arm to the rocker shaft, wherein the curved arm portion is arranged to match a curvature of the rocker shaft; wherein the rocker arm is rotatably coupled to the rocker shaft by engagement between the curved arm portion and the rocker shaft; and wherein the elongate body portion extends outwardly from the curved arm portion in one direction and comprises a valve-cooperating portion disposed at or adjacent the free end of the body portion and a camshaft-cooperating portion disposed between the valve-cooperating portion and the curved arm portion.