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US 4,785,612 AGranted
Walk-behind lawn mower
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsMasahiro Morishita, Kiyotaka Mikome, Mitsuo Miyazaki
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AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsMasahiro Morishita, Kiyotaka Mikome, Mitsuo Miyazaki
Estimating the term…
Self-propelled walk-behind lawn mower having a rear discharge chute. The rear wheels of the lawn mower are driven by the engine through an axle which is fixed relative to the outer housing and which extends below the discharge chute so as to not interfere with the flow of grass clippings from the discharge chute. A transmission is provided for driving the rear wheels and is offset to one side of the discharge chute so as to be clear of the path of discharged grass. All four wheels of the mower are simultaneously adjustable and the driven rear wheels are adjustably by pivotal movement of a driving transmission that interconnects the wheels with the driven axle. In addition, a combing arrangement is provided on the outer housing for combing grass upwardly before it reaches the cutting blade.
A rotary walk-behind lawn mower having an outer housing, a rotating cutting blade contained within said outer housing and rotatable about a generally vertically extending axis, a power unit carried by said outer housing for driving said cutting blade, said outer housing defining a discharge chute through which grass cut by said cutting blade is discharged, a plurality of wheels journaled relative to said outer housing, an axle, a pair of chain drive transmissions for rotatably coupling two of said wheels to said axle, said axle being journaled by said outer housing and extending across and beneath said discharge chute, and means for driving said axle from said power unit, each of said chain drive transmissions being contained within a respective housing which is pivotal about the axis of said axle for changing the cutting height of the lawn mower.
A rotary walk-behind lawn mower having an outer housing, a rotating cutting blade contained within said outer housing, and rotatable about a generally vertically extending axis, a power unit carried by said outer housing for driving said cutting blade, said outer housing defining a discharge chute through which grass cut by said cutting blade is discharged, a plurality of wheels journaled relative to said outer housing, an axle, means for driving said axle from said engine, and first and second transmission means for driving a first and second of said wheels form respective ends of said axle, said first and said second transmission means being pivotal about said axle for adjusting the height of said outer housing relative to said first and said second wheels.
Dependencies are inferred from the claim text.