US5404699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knife edged stalk rolls
Assignee: Deere and Co
•
Filing: 1993-05-11
•
Granted: 1995-04-11
•
Expires: 2013-05-11
Abstract
Abstract A stalk roll comprises a cylindrical shell having six integral flutes. Each flute is provided with a knife edge having a leading surface and a trailing surface. The leading surface has a forward slope of approximately 10° from the plane formed by the central longitudinal axis of the cylindrical shell and the vertex of the respective knife edge. The trailing surface has a reverse slope of approximately 30° from the plane formed by the central longitudinal axis of the cylindrical shell and the vertex of the respective knife edge. The cylindrical shell comprises two semi-cylindrical pieces that are clamped about a drive shaft of a corn harvesting head by associated bolts.
Inventors
- 👤 Timothy F. Christensen
- 👤 Bonnie D. Adams
- 👤 Jerry A. Sandau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:44
CPC Classifications
A; A01; A01D; A01D45/00; A01D45/02; A01D45/021; A01D45/025
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
104 words
A stalk roll for a corn harvesting header, the stalk roll comprising: a cylindrical shell having a central longitudinal axis; longitudinal integral flutes extending radially from the shell, the flutes are substantially parallel to the central longitudinal axis, each flute is provided with a knife edge, each knife edge has a leading surface and a trailing surface, the leading surface has a forward slope, the trailing surface has a reverse slope, the leading surface is steeper than the trailing surface and forms an acute angle with the trailing surface; and means for mounting the shell to a drive shaft of a corn harvesting header.
Claim 2
Dependent Claim
104 words
A stalk roll for a corn harvesting header, the stalk roll comprising: a cylindrical shell having a central longitudinal axis; longitudinal integral flutes extending radially from the shell, the flutes are substantially parallel to the central longitudinal axis, each flute is provided with a knife edge, each knife edge has a leading surface and a trailing surface, the leading surface has a forward slope, the trailing surface has a reverse slope, the leading surface is steeper than the trailing surface and forms an acute angle with the trailing surface; and means for mounting the shell to a drive shaft of a corn harvesting header.
Claim 3
Dependent Claim
17 words
A stalk roll as defined by claim 1 wherein the cylindrical shell is provided with six flutes.
Claim 4
Dependent Claim
36 words
A stalk roll as defined by claim 2 wherein the forward slope of the leading surface is approximately 10° from the plane formed by the central longitudinal axis and the vertex of the respective knife edge.
Claim 5
Dependent Claim
36 words
A stalk roll as defined by claim 3 wherein the reverse slope of the trailing surface is approximately 30° from the plane formed by the central longitudinal axis and the vertex of the respective knife edge.
Claim 6
Dependent Claim
36 words
A stalk roll as defined by claim 2 wherein the reverse slope of the trailing surface is approximately 30° from the plane formed by the central longitudinal axis and the vertex of the respective knife edge.
Claim 7
Dependent Claim
22 words
A stalk roll as defined by claim 2 wherein the cylindrical shell comprises two semi-cylindrical pieces, each semi-cylindrical piece having three flutes.
Claim 8
Dependent Claim
41 words
A stalk roll as defined by claim 6 wherein the means for mounting comprises at least two bolt holes formed in each semi-cylindrical piece and associated bolts for clamping the semi-cylindrical pieces about the drive shaft of the corn harvesting head.
Claim 9
Dependent Claim
24 words
A stalk roll as defined by claim 1 wherein the acute angle formed by the leading surface and the trailing surface is approximately 40°.
Claim 10
Dependent Claim
14 words
A stalk roll as defined by claim 1 wherein each knife edge is self-sharpening.
Claim 11
Dependent Claim
17 words
A stalk roll as defined by claim 9 wherein the leading surface is coated with tungsten carbide.
Claim 12
Dependent Claim
114 words
A pair of adjoining stalk rolls for a corn header, the adjoining stalk rolls defining a harvesting gap, each stalk roll comprising: a cylindrical shell having a central longitudinal axis; longitudinal integral flutes extending radially from the shell, the flutes are substantially parallel to the central longitudinal axis, each flute is provided with a knife edge, each knife edge has a leading surface and a trailing surface, the leading surface has a forward slope, the trailing surface has a reverse slope, the leading surface is steeper than the trailing surface and forms an acute angle with the trailing surface; whereby the flutes of the pair of adjoining stalk rolls are offset to one another.
Claim 13
Dependent Claim
114 words
A pair of adjoining stalk rolls for a corn header, the adjoining stalk rolls defining a harvesting gap, each stalk roll comprising: a cylindrical shell having a central longitudinal axis; longitudinal integral flutes extending radially from the shell, the flutes are substantially parallel to the central longitudinal axis, each flute is provided with a knife edge, each knife edge has a leading surface and a trailing surface, the leading surface has a forward slope, the trailing surface has a reverse slope, the leading surface is steeper than the trailing surface and forms an acute angle with the trailing surface; whereby the flutes of the pair of adjoining stalk rolls are offset to one another.
Claim 14
Dependent Claim
17 words
A pair of adjoining stalk rolls as defined by claim 11 wherein each knife edge is self-sharpening.
Claim 15
Dependent Claim
22 words
A pair of adjoining stalk rolls as defined by claim 12 wherein each of the cylindrical shells is provided with six flutes.
Claim 16
Dependent Claim
39 words
A pair of adjoining stalk rolls as defined by claim 13 wherein the forward slope of each leading surface is approximately 10° from the plane formed by the central longitudinal axis and the vertex of the respective knife edge.
Claim 17
Dependent Claim
39 words
A pair of adjoining stalk rolls as defined by claim 14 wherein each reverse slope of the trailing surface is approximately 30° from the plane formed by the central longitudinal axis and the vertex of the respective knife edge.
Claim 18
Dependent Claim
39 words
A pair of adjoining stalk rolls as defined by claim 12 wherein each reverse slope of the trailing surface is approximately 30° from the plane formed by the central longitudinal axis and the vertex of the respective knife edge.
Claim 19
Dependent Claim
27 words
A pair of adjoining stalk rolls as defined by claim 12 wherein each acute angle formed by the leading surface and the trailing surface is approximately 40°.
Claim 20
Dependent Claim
25 words
A pair of adjoining stalk rolls as defined by claim 12 wherein each cylindrical shell comprises two semi-cylindrical pieces, each semi-cylindrical piece having three flutes.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-04-10 | 1998-10-10 | 1999-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-10 | 2002-10-10 | 2003-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-10 | 2006-10-10 | 2007-04-11 | $7700.00 | Window Closed / Lapsed |