A steerable, electrically powered, three wheeled vehicle has a frame with a front end extending upwardly at a restricted angle. Laterally spaced apart rear wheels supporting the rear end, a steerable front wheel, journaled by the said front end for steerability, supports said front end. An elevated seat...http://www.google.co.uk/patents/US4846295?utm_source=gb-gplus-sharePatent US4846295 - Steerable motorized three-wheeled vehicles for use by the handicapped and others desiring assistance
