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US 2006/0042216 A1Published application
Lawn mower
AssigneeHonda Motor Co., Ltd.
InventorsMakoto Warashina, Tommy Plouraboue, Guillaume Vizzutti, Patrick Templier
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Abstract
A lawn mower having upper and lower cutter blades in a cutter housing is provided. The blades are disposed with a phase difference such that upper blade edge parts of the upper cutter blade are advanced forward with respect to lower blade edges of the lower cutter blade in the rotation direction, whereby interference of the upper cutter blade with the air-lifting parts of the lower cutter blade is avoided, and the noise produced by the rotation of the upper and lower cutter blades is reduced.
Claims3
A lawn mower comprising:
- a cutter housing;
- a motive power source mounted on the cutter housing;
- a lower cutter blade attached rotatably inside the cutter housing and substantially horizontally to the end of the output shaft of the motive power source;
- and
- an upper cutter blade attached rotatably inside the cutter housing and substantially horizontally to the output shaft above the lower cutter blade,
- wherein the lower cutter blade has lower blade edge parts formed at its leading edges in the rotation direction for cutting grass and air-lifting parts formed behind these lower blade edge parts for creating a swirl current and a lift current,
- the upper cutter blade has upper blade edge parts formed at its leading edges in the rotation direction for cutting grass,
- and the upper blade edge parts are advanced in phase so that they are positioned forward in the rotation direction with respect to the lower blade edge parts.
5 more elements
Dependencies are inferred from the claim text.