Process for sharpening the knives of a rotating drum and adjusti

Details Process for sharpening the knives of a rotating drum and adjusti Process for sharpening the knives of a rotating drum and adjusti

1991-06-25

1993-05-11

Bagnell, David J.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

51247, 56250, 76 821, B24B 355, A01D 7508

Patent

active

052090256

ABSTRACT:
In a fodder harvesting machine, the device disclosed comprises a rotating chopping drum (1) and a fixed counter-knife (25) cooperating with the knives (2) of the drum (1), as well as a retractable wheel (21) adapted to be moved in rotation in order periodically to sharpen the knives (2). According to the invention, at least two positioners (5, 6, 7, 8) located near the free ends of the chopping drum (1) are mounted to pivot about the geometrical axis thereof and connected to an actuation device (a) bringing, by pivoting, the end contact piece (8) of each positioner (7) either opposite the wheel (21), or opposite a corresponding stop (32) of the counter-knife (25) which is fastened to a fixed support (3, 35) via a presser device (34) and a fixing device (33).

REFERENCES:
patent: 3793792 (1974-02-01), Wagstaff et al.
patent: 4321773 (1982-03-01), Fleming
patent: 4503643 (1985-03-01), Johnson et al.
patent: 4843303 (1989-05-01), McClure et al.

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