Straw walker for chaff removal in a combine

Details Straw walker for chaff removal in a combine Straw walker for chaff removal in a combine

1994-02-08

1996-01-30

Melius, Terry Lee

Crop threshing or separating

Separator

Straw walker

460 96, 460148, A01F 1232

Patent

active

054877032

ABSTRACT:
A straw walker for an agricultural combine includes a linear, elongated body having a lower, generally horizontal, sieve-like panel and a pair of spaced, generally vertical sidewalls. The upper edge of each of the spaced sidewalls is provided with a plurality of generally V-shaped teeth for agitating a chaff and grain mixture and moving the chaff rearward for discharge from the rear of the combine. Various elements are attached to the upper surface of the straw walker's lower panel for improving the separation of the grain from the chaff. Each of these elements includes at least one elongated, linear blade-like member having a plurality of spaced teeth on an upper edge thereof. Increased spacing of the teeth in the blade-like member allows the chaff and grain mixture along the center of the straw walker to be displaced rearwardly faster than the mixture along the edges of the walker for improved agitation of the mixture and separation of the grain from the chaff as well as faster chaff discharge. Other elements include a pair of spaced, coupled blade-like members each having an upper row of teeth for further reducing the chaff and facilitating its rearward displacement and discharge and improved separation of the grain from the chaff. A stripper plate removes material from a rotating beater disposed aft of the combine's rotating cylinder and forward of the straw walker to prevent backfeeding over the cylinder and to reduce turbulence in the separation stages.

REFERENCES:
patent: 5021029 (1991-06-01), Usick
Brochure entitled, "New Hydro Row-Crop And Small-Grain Combine," published by John Deere (1990).
Brochure entitled, "Maximizer Combines For Corn and Row Crops" published by John Deere (1993).

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