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US 6,385,951 B1Granted
Rotary plant mowing apparatus employing auto-rotation of blade units
AssigneeMarujun Juko Kabushikiasha
InventorJunji Ogawa
Life of this patent
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AssigneeMarujun Juko Kabushikiasha
InventorJunji Ogawa
Estimating the term…
A plant mowing apparatus in which a driven case is rotationally engaged by way of a braking device to a cylindrical frame having a rotary driving shaft pivoted therein and a plurality of cutter rotary shafts each having rotary blade units joined at the top end is attached to the driven case in parallel with the rotary driving shaft, rotary bodies having predetermined circumferential ratio are fixed respectively, to the rotary driving shaft and the cutter rotary driving shaft, and the rotary body for the cutter rotary shaft and the rotary body for the rotary driving shaft are connected by way of a rotation transmitting unit, such that the cutter rotary shaft revolves under auto-rotation. The cutter unit of the rotary blade having a plurality of blade edges at the circumferential side and each of the blade edges is turned to the rotational direction for cutting by the change of the attaching angle, the rotary blade unit and the cutter rotary shaft are engaged under pressure by way of a resilient member. Vertical slits are formed to the cover in a case where a side cover is used while skids may be attached in a case of not using the side cover.
A plant mowing apparatus comprising a main body frame having an integral, downwardly extending cylindrical portion, a rotary driving shaft rotatably mounted to the main body frame coaxially with the cylindrical portion and driven by a rotary driving unit, a driven case engaging the cylindrical portion of the main body frame for rotation with respect thereto, a cutter rotary shaft mounted for rotation in the driven case and disposed in parallel with the rotary driving shaft, a rotary blade unit having a cutter unit attached to a base member and joined to a bottom end of the cutter rotary shaft, a rotation transmitting unit disposed between the rotary driving shaft of the main body frame and the cutter rotary shaft of the driven case for transmitting the rotational force of the rotary driving shaft to the rotary blade unit, wherein a braking device is disposed between the cylindrical portion of the main body frame and the driven case for suppressing rotation of the driven case.
Dependencies are inferred from the claim text.