Patent ID: 6052973
Filing Date: 2000-04-25
Classification: A01D

Abstract:
A lawn tractor comprising:a vehicle body;a center reel-type cutting unit positioned forwardly of and at a lateral center of said vehicle body;side reel-type cutting units arranged forwardly of said vehicle body and laterally of and displaced in a fore-aft direction with respect to said center reel-type cutting unit with respect to a moving direction of said vehicle body, wherein a cutting track by said center reel-type cutting unit and cutting tracks by said side reel-type cutting units partly overlap one another;a first lift mechanism for connecting said center reel-type cutting unit to said vehicle body such that said center reel-type cutting unit is pivotable about a fore-aft extending axis; wherein said first lift mechanism is operable to raise and lower said center reel-type cutting unit without displacing said center reel-type cutting unit transversely of said moving direction; andsecond lift mechanisms for connecting said side reel-type cutting units to said vehicle body such that each said side reel-type cutting unit is pivotable about a fore-aft extending axis, respectively, wherein said second lift mechanisms are operable to raise and lower said side reel-type cutting units without displacing said side reel-type cutting units transversely of said moving directionwherein said first and second lift mechanisms are capable of automatically following a vertical displacement of the grounds to raise and lower said respective cutting units according to different contours of the ground.