Patent ID: 8087221

Claim:
A mower unit to be suspended from a machine body of a grass mower, the mower unit comprising: a mower deck mounting therein in parallel layout first, second and third rotary blades rotatably driven about vertical axes, said mower deck including: a top wall, side walls, and first, second and third auxiliary side walls, each of the auxiliary side walls having a shape thereof extending along at least a rear portion of a rotary path of the rotary blade associated therewith, wherein the top wall, the side walls and the first, second, and third auxiliary side walls define an enclosure space for housing the first, second, and third rotary blades, respectively; and a washing device including: a single water supplying unit disposed upwardly of the top wall for supplying washing water, first water discharging unit disposed through said first auxiliary side wall for discharging water to said enclosure space, a second water discharging unit disposed through said second auxiliary side wall for discharging water to said enclosure space, a third water discharging unit disposed through said third auxiliary side wall for discharging water to said enclosure space, and a water supplying pipe unit interconnecting and communicating the water supplying unit to the first, second and third water discharging units, said water supplying pipe unit being disposed within a mower deck rear space delimited by outer faces of said first, second and third auxiliary side walls; wherein said first, second and third water discharging units are configured to discharge the washing water in such a manner that a center flow portion of the discharged water respectively therefrom is confined within said enclosure space of the mower deck; wherein said first rotary blade is disposed between said second rotary blade and said third rotary blade; a rotation center of said first rotary blade is located more forwardly of the machine body than rotation centers of said second rotary blade and said third rotary blade; and said mower deck rear space is formed rearwardly of said first auxiliary side wall; and wherein rearwardly of said first auxiliary side wall, there is provided a rear side wall interconnecting said second auxiliary side wall and said third auxiliary side wall, and said washing device is supported by said rear side wall.