Patent ID: 7677213

Claim:
A deactivating roller follower assembly for deactivating an associated poppet valve for an internal combustion engine, the assembly comprising: a body including a valve end, a pivot end, and a plunger bore, the valve end of the body being configured to contact the associated poppet valve and the pivot end of the body being configured to contact a pivot of the associated internal combustion engine; a pivotable arm including a hinged end and a free end, the hinged end rotatably mounted to the valve end of the body, the free end having a curvilinear latching surface for transmitting a force required to activate the associated poppet valve, the curvilinear latching surface including a convex portion, a point of inflection, and a concave portion; and a plunger including a latching end and a piston end, the plunger being disposed in the plunger bore in the pivot end of the body, the plunger moving between an extended position and a retracted position, the latching end of the plunger selectively engaging the free end of the arm to place the arm in a latched state whereby preventing the arm from moving relative to the body, the latching end of the plunger selectively disengaging the free end of the arm to place the arm in an unlatched state whereby permitting the arm to move relative to the body.