Harvesters – Motorized harvester – Including driven air-blower unit
Patent
1978-07-07
1980-06-03
Eskovitz, Jay N.
Harvesters
Motorized harvester
Including driven air-blower unit
56 134, 56 169, 56 174, 563201, 56295, A01D 35262
Patent
active
042055105
ABSTRACT:
An improved rotary lawn mower utilizing a novel cutting apparatus for increased safety. The cutting apparatus comprises a cutting wheel disposed within a blade cover, a protective housing releasably suspended by the blade cover beneath the cutting wheel, and a fan incorporated into the cutting wheel for drawing grass upwardly through slots in the protective housing and discharging the grass cuttings. The cutting wheel comprises a central hub for attachment to the drive shaft of the lawn mower engine, a plurality of radially-extending, horizontally-oriented rotary cutting blades, and a peripheral rim. A radial-flow fan is formed by the rim, and the cutting blades form an axial-flow fan, both of which produce an air flow which draws grass through the slots and discharges the cuttings through a discharge port of the blade cover. The cutting blades and the edges of the slots in the bottom of the wheel housing cooperate with a scissors-like shearing action to cut grass which is drawn up through the slots by the air flow. Blades and openings in the rim which form the radial-flow fan also serve to mulch the grass clippings before they are discharged. Annular skids welded to the bottom of the wheel housing provide a minimum spacing between the cutting blades and the ground and reinforces the wheel housing.
REFERENCES:
patent: 2318430 (1943-05-01), Spahn
patent: 2706372 (1955-04-01), Blydenburgh
patent: 3059400 (1962-10-01), Plummer
patent: 3096608 (1963-07-01), Williamson
patent: 3098337 (1963-07-01), Teachworth
patent: 3134212 (1964-05-01), Gary
patent: 3283488 (1966-11-01), Franklin
patent: 3338039 (1967-08-01), Nightingale
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