US4143504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cornstalk harvester
Assignee: FORTSCHRITT LANDMASCHINEN GmbH
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Filing: 1977-01-25
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Granted: 1979-03-13
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Expires: 1997-01-25
Abstract
Abstract A harvester for a multirow corn crop comprises a cutting head whose leading edge is formed with individual cutting members at each of a plurality of channels. The channels run rearwardly and unite at the rear portion of the head. Each of the channels is provided along one flank with a yieldable wall and along the other flank with a chain having entraining members reaching substantially across the full width and height of the channel. The entraining members are preferably of L-shape in plan view and have a pair of friction strips resting against the respective wall of the channel above and below the chains.
Inventors
- 👤 Christian Noack
- 👤 Klaus Oliva
- 👤 Theodor Eistert
- 👤 Bernd Zumpf
- 👤 Hans P. Spaida
- 👤 Gunter John
- 👤 Frank Pietschmann
- 👤 Pal Boltizar
- 👤 Istvan Fabry
- 👤 Csongor Vida
- 👤 Lajos Lakos
- 👤 Matyas Klement
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:49
CPC Classifications
A; A01; A01D; A01D45/00; A01D45/02; A01D45/021; A01D45/023
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
214 words
A corn stalk cutting head for a chopping machine comprising: means forming at least one pair of stalk guide channels having inlet ends at a leading edge of said head and outlet ends at a rear portion of said head; an elastically deflectable stationary flank formed along one side of each of said channels, said flank comprising a support wall, a layer of a resiliently compressible material attached to said wall and a plastic foil overlying said layer and confronting the other side of the respective channel; a chain extending along the other side of each of said channels; and a multiplicity of entraining members mounted on said chain in closely spaced relationship, each of said entraining members being bent at right angles and formed with a shank lying along a wall of said other side of said channel and a transversely projecting foot extending substantially across the full width of said channel and substantially filling the cross section thereof, said shank being provided with friction strips resting along said wall of said other side of the channel, said feet being formed with beveled free ends proximal to said flank and forming cutting edges, said feet having profiled free extremities and said flank having a complementary profile close fitting with that of said feet.
Claim 2
Dependent Claim
214 words
A corn stalk cutting head for a chopping machine comprising: means forming at least one pair of stalk guide channels having inlet ends at a leading edge of said head and outlet ends at a rear portion of said head; an elastically deflectable stationary flank formed along one side of each of said channels, said flank comprising a support wall, a layer of a resiliently compressible material attached to said wall and a plastic foil overlying said layer and confronting the other side of the respective channel; a chain extending along the other side of each of said channels; and a multiplicity of entraining members mounted on said chain in closely spaced relationship, each of said entraining members being bent at right angles and formed with a shank lying along a wall of said other side of said channel and a transversely projecting foot extending substantially across the full width of said channel and substantially filling the cross section thereof, said shank being provided with friction strips resting along said wall of said other side of the channel, said feet being formed with beveled free ends proximal to said flank and forming cutting edges, said feet having profiled free extremities and said flank having a complementary profile close fitting with that of said feet.
Claim 3
Dependent Claim
16 words
The head defined in claim 1 wherein said entraining members are of L-shape in plan view.
Claim 4
Dependent Claim
17 words
The head defined in claim 1 wherein said entraining members are of substantially T-shape in plan view.
Claim 5
Dependent Claim
15 words
The head defined in claim 1 wherein said feet are toothed at said free ends.
Claim 6
Dependent Claim
25 words
The head defined in claim 1 wherein said flank is formed with a continuous ridge and said feet are provided with slots receiving said ridge.
Claim 7
Dependent Claim
60 words
The head defined in claim 1, further comprising a cutting blade at the inlet of each of said channels operatively connected with the respective chain and driven thereby, said cutting device comprising a rotor on said other side of said channel and a counter-rotor on the first-mentioned side of said channel, each of said rotors being provided with respective blades.
Claim 8
Dependent Claim
24 words
The head defined in claim 6 wherein each of said counter-rotors is provided with a respective starwheel for feeding cornstalks into the respective channel.
Claim 9
Dependent Claim
29 words
The head defined in claim 1 wherein said channels merge at the rear of said head and the chains of the respective channels interdigitate upon merger of said channels.
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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) | 1982-03-12 | 1982-09-11 | 1983-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-12 | 1986-09-11 | 1987-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-12 | 1990-09-11 | 1991-03-13 | $7700.00 | Window Closed / Lapsed |