Lawn mower

Details Lawn mower Lawn mower

2007-07-31

2007-07-31

Kovács, Árpád Fábián (Department: 3671)

Harvesters

Cutting

Housing or guard

Reexamination Certificate

active

10998901

ABSTRACT:
A lawn mower comprises a power source for rotatably driving an output shaft, a housing having an interior space having a generally spiral-shaped portion, and a cutting blade disposed in the interior space of the housing and connected to the output shaft for rotation therewith to cut grass. The rotating cutting blade coacts with the spiral-shaped portion of the interior space to generate a swirling air flow that causes the cut grass to swirl within the interior space. A grass discharge passage communicates with the interior space of the housing and discharges therethrough grass cut by the cutting blade and swirling within the interior space of the housing. A pivotal shutter is pivoted about a generally vertical axis by manual operation of a control member to open and close the grass discharge passage. The pivotal shutter comprises a pivotal shaft and a unitary shutter member mounted on the pivotal shaft to undergo pivotal movement therewith for opening and closing the grass discharge passage.

REFERENCES:
patent: 3872656 (1975-03-01), Dahl
patent: 3893284 (1975-07-01), Thon et al.
patent: 3949540 (1976-04-01), Christopherson et al.
patent: 4152884 (1979-05-01), Gandrud et al.
patent: 5033260 (1991-07-01), Jerry
patent: 5107566 (1992-04-01), Schmid
patent: 5179823 (1993-01-01), Pace
patent: 6105350 (2000-08-01), Vachon et al.
patent: 6862875 (2005-03-01), Iida et al.

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