US Patent 7131499 Combination line trimmer and edger

An improved line trimmer and edging unit for lawn and garden use provides a multi-position accessory handle, a roller edge guide having a flange concentrically located about the motor shaft and being of sufficient diameter to maintain a consistent distance between the cutting plane and the object being edged around, symmetrically disposed safety switches, and a battery located symmetrically in-line with the center of the shaft of the unit. The combination lawn trimmer and edger unit may be used in a first, horizontal cutting plane position for lawn and weed trimming, and may be further used in a second, vertical cutting plane position for edging.