Harvesters – Cotton – Pickers
Patent
1994-02-22
1995-03-07
Novosad, Stephen J.
Harvesters
Cotton
Pickers
56 50, A01D 4616
Patent
active
053946804
ABSTRACT:
A spindle nut and bushing assembly for cotton picker row units includes a light-weight spindle nut and a single elongated bushing having a length to outer diameter ratio of greater than two. The bushing extends through substantially the entire length of the spindle nut to provide a low friction bearing surface with sufficient strength to reinforce the spindle nut against breakage even when the spindle is impacted and fractured by an obstacle. In one embodiment of the invention, the nut is formed from a thermoplastic material and the bushing is fabricated from powdered metal, preferably a sintered bronze-iron alloy, and includes elongated grooves which act as lubricant reservoirs. In another embodiment, the bushing is formed from a filament-wound fiberglass material. The weight of the plastic nut is less than 75% of that of a conventional steel nut. In an alternative embodiment, the nut is fabricated from a light-weight metal such as aluminum.
REFERENCES:
patent: 2497777 (1950-02-01), Baker et al.
patent: 2668410 (1954-02-01), Bramblett
patent: 2670585 (1954-03-01), Hagen et al.
patent: 3718964 (1973-03-01), Warezak
patent: 4331496 (1982-05-01), Orndorff, Jr.
patent: 4757671 (1988-07-01), McConnell
patent: 5332348 (1994-07-01), Lemelson
Polygon Co., Polygon Co. brochure, pp. 2-5, dated Feb. 1994, published in the U.S.A.
Deutsch Timothy A.
Sheldon, Jr. Donald H.
Wigdahl Jeffrey S.
Deere & Company
Novosad Stephen J.
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