US4007744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grain accelerator precleaner
Assignee: Deutz Allis Corp
•
Filing: 1975-07-02
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Granted: 1977-02-15
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Expires: 1995-07-02
Abstract
Abstract The threshed material leaving the threshing cylinder of a grain harvester or combine is accelerated into a transverse air stream by a pair of rolls. The rolls are disposed on parallel axes and are rotated at a relatively high speed in opposite directions whereby their confronting peripheries engage and accelerate the threshed material to a velocity substantially in excess of the speed at which such material would fall by gravity. A wide band of relatively high speed air is directed transversely through the accelerated material to provide a precleaning of straw and chaff from the material normally passing to the grain separation or cleaning shoe section of the combine. The grain in the accelerated material continues in a relatively straight line trajectory and the straw and chaff are separated from the grain by the transverse air stream.
Inventors
- 👤 J. Lyle Shaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:23
CPC Classifications
A; A01; A01F; A01F12/00; A01F12/44; A01F12/442
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
142 words
In a grain harvester having a threshing cylinder, and a concave on the underside of said cylinder, the combination comprising: a shaker shoe assembly including a grain pan at its forward end disposed beneath said concave, a pair of side by side accelerator rolls disposed above said grain pan and in underlying relation to said concave, said accelerator rolls being disposed on horizontally spaced parallel axes and receiving therebetween threshed material from said concave, power means driving said accelerator rolls in opposite directions whereby threshed material passing between said rolls is accelerated downwardly toward said grain pan, and air delivery means directing a predetermined horizontal rearward flow of air through and transverse to the accelerated threshed material passing from said accelerator rolls to blow the chaff and straw particles rearwardly from the kernels of grain which pass downwardly to the grain pan.
Claim 2
Dependent Claim
142 words
In a grain harvester having a threshing cylinder, and a concave on the underside of said cylinder, the combination comprising: a shaker shoe assembly including a grain pan at its forward end disposed beneath said concave, a pair of side by side accelerator rolls disposed above said grain pan and in underlying relation to said concave, said accelerator rolls being disposed on horizontally spaced parallel axes and receiving therebetween threshed material from said concave, power means driving said accelerator rolls in opposite directions whereby threshed material passing between said rolls is accelerated downwardly toward said grain pan, and air delivery means directing a predetermined horizontal rearward flow of air through and transverse to the accelerated threshed material passing from said accelerator rolls to blow the chaff and straw particles rearwardly from the kernels of grain which pass downwardly to the grain pan.
Claim 3
Dependent Claim
16 words
The combination of claim 1 wherein said accelerator rolls are substantially parallel to said threshing cylinder.
Claim 4
Dependent Claim
14 words
The combination of claim 1 wherein each of said rolls have circumferentially spaced lugs.
Claim 5
Dependent Claim
16 words
The combination of claim 3 wherein said lugs mesh without touching during rotation of said rolls.
Claim 6
Dependent Claim
22 words
The combination of claim 3 wherein said lugs are equally spaced and wherein said power means drives said rolls at equal speeds.
Claim 7
Dependent Claim
28 words
The combination of claim 5 wherein said power means includes timing means maintaining said lugs on one roll out of phase with the lugs of said other roll.
Claim 8
Dependent Claim
30 words
The combination of claim 6 wherein said axes of said rolls are spaced from one another a distance equal to one-half the sum of the outer diameters of said rolls.
Claim 9
Dependent Claim
14 words
The combination of claim 7 wherein the diameters of said rolls are substantially equal.
Claim 10
Dependent Claim
14 words
The combination of claim 1 wherein said rolls are made of soft rubber-like material.
References Cited (Backward Citations)
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Cited
CA474148A
Cited
US1290610A
Cited
AU222254A
Cited
US3456786A
Cited
US3635336A
Cited
US3813184A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-15 | 1980-08-16 | 1981-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-15 | 1984-08-16 | 1985-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-15 | 1988-08-16 | 1989-02-15 | $7700.00 | Window Closed / Lapsed |