US Patent 7617661 Tri-wheeled modular housing telescopic grass trimmer

The present invention relates to a grass trimmer comprising a wheeled carriage, a motorized cutting element situated in a housing unit fitted to said carriage, and an integrated hand lever, the improvements comprising the cutting element being situated between front and rear wheels so as to render it unobstructed on each side, and the integrated hand lever being connected to the front wheel via a telescopic shaft so as to maintain the cutting element relatively parallel to the underside of the carriage as it is raised and lowered via adjustment to the telescopic shaft.