US Patent 7762049 Electric mower having two-motion activation system

An electric outdoor power machine includes a machine body supported by wheels and having an output member driven by a motor. The motor is powered by a source of electrical power such as a battery. An upright assembly extends from the machine body and has a gripping handle. A manual input member such as a bail handle is mounted adjacent to the gripping handle and is movable relative to the gripping handle between a deactivated position and an activated position. A control assembly that selectively communicates electric power to the output member includes a button supported by a housing on the upright assembly. The button is movable between an unactuated position and an actuated position. A button crank is coupled to the button and has an interface portion.