Patent ID: 8056517

Claim:
A variable valve lift apparatus of an engine, comprising: a control shaft; a driving arm coupled around the control shaft and rotatable by a cam of a camshaft; a first rocker arm rotatably coupled around the control shaft, that is operated by the driving arm so as to drive a first valve through a first swing arm; a second rocker arm rotatably coupled to the control shaft, that is operated by the driving arm so as to drive a second valve through a second swing arm; and a mediating device rotatably coupled to the control shaft, that transmits a movement of the driving arm to the first rocker arm and the second rocker arm, wherein the control shaft comprises a circular cam that is eccentrically and rotatably coupled around an axis of the control shaft and wherein the mediating device comprises: a circular body rotatably enclosing the circular cam, a mediating arm that extends from the circular body in a direction between the driving arm and the rocker arms, and a drive shaft that is connected with an end portion of the mediating arm and is disposed between the driving arm and the rocker arms to simultaneously contact the driving arm and the rocker arm so that a rotating motion of the driving arm is transferred to the rocker arms via the drive shaft.