Patent ID: 8056523

Claim:
A rocker arm apparatus for cylinder deactivation, comprising: a cylinder valve including an upper valve end, wherein the cylinder valve is biased upwardly in an open position; a rocker arm including opposing pivot ends aligned along a rear pivot axis located on a rear end portion of the rocker arm, the rocker arm further including a pressing plate having an arcuate bottom surface abutting against the upper valve end; a restoring spring supporting the rear end portion of the rocker arm; a roller coupled to the rocker arm to be pressed by a cam; a pair of rocker shaft support members disposed adjacent to both opposing pivot ends of the rocker arm; at least a pivot member selectively engaged with the rocker shaft support members to allow pivotal rotation of the rocker arm with respect to the rocker support shaft members; and hydraulic pressure means for engaging or disengaging the pivot member to or from the rocker shaft support members, wherein the arcuate bottom surface of the rocker arm rocks upon the upper valve end when the pivot member is disengaged from the rocker shaft support members.