Blade assembly for lawn mowers

Details Blade assembly for lawn mowers Blade assembly for lawn mowers

1977-11-25

1979-08-14

Mancene, Louis G.

Harvesters

Cutting

Cutter members

563202, A01D 5518

Patent

active

041641124

ABSTRACT:
A cutting blade assembly for a lawn mower is provided with mechanism for prestressing the blade to lessen vibration during use and also for adjusting the blade so as to accurately position and align the blade relative to the associated blade housing so that the blade operates in a horizontal plane. This prestressing and adjusting mechanism may also be employed to compensate for any misalignment in the mounting of the blade spindle relative to the blade housing. In one specific embodiment in which the blade is bolted to a blade support bar which, in turn, is fixed to a vertical spindle mounted centrally to the blade housing, the prestressing and adjusting mechanism is achieved by pressure-applying bolts or screws threaded through the blade support bar on opposite sides of the spindle so as to be engageable with the blade. Advancement of the screws serves to deflect the blade downwardly to prestress the blade and/or to position the blade in a desired horizontal plane. Lock nuts are provided about the screws to engage the blade support bar and fix the screws in position after adjustment.

REFERENCES:
patent: 283056 (1883-08-01), Yocom, Jr.
patent: 1794178 (1931-02-01), Karcher
patent: 2779409 (1957-01-01), Becker
patent: 3035359 (1962-05-01), Ewert
patent: 3080697 (1963-03-01), Mauro
patent: 3093952 (1963-06-01), Bonser
patent: 3496819 (1970-02-01), Blum
patent: 3589112 (1971-06-01), Frohmader
patent: 3601960 (1971-08-01), Buechler

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