Earth working – Automatic power control – Obstruction sensing type
Patent
1991-12-23
1993-01-26
Reese, Randolph A.
Earth working
Automatic power control
Obstruction sensing type
172 5, 56 102, A01B 6906
Patent
active
051815729
ABSTRACT:
An improved apparatus (62) for on-the-go lateral adjusting of a field implement (10) is provided, and is especially useful for a pull-behind, tractor-mounted implement (10) designed to operate on or between rows (30) of a crop (32). The apparatus (62) includes a sensing assembly (64) having lowermost feelers (70, 72) designed to detect the position of the implement (10) relative to generally parallel crop rows (30), along with implement adjusting structure (66) and a hydraulic control assembly (68). The adjusting structure (66) is preferably in the form of a piston and cylinder assembly (104) pivotally coupled between the draw bar (14) of a tractor (12) and one of the three point hitch arms (16) thereof. The control assembly (68) is in the form of a solenoid-operated hydraulic valve (128) interposed between the hydraulic system of the tractor (12) and the cylinder (106) of piston/cylinder assembly (104). In use, when the feelers (70, 72) detect that implement (10) is misaligned relative to crop rows (30), the valve (128) is actuated to operate assembly (104) and thereby laterally shift the hitch arms (16); this in turn acts to lead the entire implement (10) back into proper alignment between the rows (30).
REFERENCES:
patent: 2727756 (1955-12-01), Carlile
patent: 3425715 (1969-02-01), Weitz
patent: 3807769 (1974-04-01), Thompson et al.
patent: 4616712 (1986-10-01), Jorgensen
patent: 4930581 (1990-06-01), Fleischer et al.
Orthman Manufacturing, Inc. brochure entitled "Computerized Quick Hitch Guidance System".
Andersen Eugene C.
Balk Gary W.
Reese Randolph A.
Thompson Jeffrey L.
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