Motor
(9) Motor means a power producing device that converts electrical energy into mechanical energy. (10) Normal starting means is the primary mechanism intended to be actuated by the operator to start a mower's engine or motor (e.g., the cord mechanism of a manual start engine, the switch of an electric motor, or a power start mechanism). (11) Operating control zone means the space enclosed by a cylinder with a radius of 15 in (381 mm) having a horizontal axis that is (1) perpendicular to the fore-aft centerline of the mower and (2) tangent to the rearmost part of the mower handle, extending 4 in (102 mm) beyond the outermost portion of each side of the handle (See Fig. 1). (12) Power source means an engine or motor. (13) Reel-type mower means a lawn mower which cuts grass by rotating one or more helically formed blades about a horizontal axis to provide a shearing action with a stationary cutter bar or bed knife. (14) Rotary mower means a power lawn mower in which one or more cutting blades rotate in essentially a horizontal plane about at least one vertical axis. (15) Separate means to cause to have any apparent relative displacement induced by external forces. (16) Shield means a part or an assembly which restricts access to a hazardous area. For the purposes of this part 1205, the blade housing is considered a shield. (17) Stress means a force acting across a unit area in a solid material in resisting separation, compacting, or sliding that tends to be induced by external forces. (18) Top of the mower's handles means the uppermost portion(s) of the handle that would be gripped by an operator in the normal operating position. (19) Walk-behind power lawn mower means a grass cutting machine either pushed or self-propelled, with a minimum cutting width of 12 in (305 mm) that employs an engine or a motor as a power source and is normally controlled by an operator walking behind the mower.