Resonant sickle drive with spring means at opposite ends of the

Details Resonant sickle drive with spring means at opposite ends of the Resonant sickle drive with spring means at opposite ends of the

1980-12-29

1982-08-03

Hafer, Robert A.

Harvesters

Cutting

Reciprocating central cutter

56306, 56299, A01D 5502

Patent

active

043421873

ABSTRACT:
In order to provide a higher cutting speed for a high speed harvester (11) torsion bars (31, 68) are connected to opposite ends of a crop cutting sickle (28). A pair of levers (46, 62) which connect the torsion bars (31, 68) to the sickle (28) carry a pair of removable counterweights (56, 96) which can be sized to change the resonant frequency to substantially correspond to the desired cutting speed. The levers (46, 62) may be interconnected by an adjustable tie bar (111) for hard to cut crops which is of sufficient mass to replace the counterweights; or, counterweights (156, 196) may be added to adjust the resonant frequency and hence the resonant cutting speed.

REFERENCES:
patent: 2109085 (1938-02-01), Chilstrom et al.
patent: 2118792 (1938-05-01), Horton
patent: 3463018 (1969-08-01), Hale et al.
patent: 3763639 (1973-10-01), Grillot
patent: 3823534 (1974-07-01), Bornzin et al.
patent: 3996806 (1976-12-01), Alexander
"Ingenious Mechanisms for Designers & Inventors", vol. II, p. 382, Fig. 11, 1957.

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