Patent US3766723A successfully refreshed from Google Patents.
US3766723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Row-crop harvester
Assignee: Maschinenfabrik Fahr AG
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Filing: 1972-11-06
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Granted: 1973-10-23
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Expires: 1992-11-06
Abstract
Abstract A two-row harvester has a pair of guides each adapted to receive a crop row and each provided with a chopper-cutter which severs the crop at its base and chops it up. These chopper-cutters each have a rotor with a substantially vertical axis and each open inwardly into a blower having an impeller formed of a vertical disk whose faces are provided with radial vanes and which is situated between the chopper-cutters. A horizontal drive shaft serving as rotation axis for the blower is provided with a pair of bevel gears which mesh with bevel gears carried on the drive shafts of the cutter-choppers so as to rotate them in opposite senses.
Inventors
- 👤 M Maier
- 👤 J Purrer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:27
CPC Classifications
A; A01; A01D; A01D43/00; A01D43/08; A01D43/081
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
113 words
A harvester comprising: a chassis displaceable along the ground in a transport direction; a pair of guides having throats opening in said direction and spaced apart on said chassis transverse to said direction, said guides each being adapted to receive a row of crop; respective cutters in said throats of said guides for cutting said crop; a blower between said cutters on said chassis and having a housing provided with opposite sides opening toward said cutters; and means associated with each of said cutters for passing the cut crop from the respective cutter into said blower through the respective side thereof, whereby the cut crop is discharged by said blower from said housing.
Claim 2
Dependent Claim
113 words
A harvester comprising: a chassis displaceable along the ground in a transport direction; a pair of guides having throats opening in said direction and spaced apart on said chassis transverse to said direction, said guides each being adapted to receive a row of crop; respective cutters in said throats of said guides for cutting said crop; a blower between said cutters on said chassis and having a housing provided with opposite sides opening toward said cutters; and means associated with each of said cutters for passing the cut crop from the respective cutter into said blower through the respective side thereof, whereby the cut crop is discharged by said blower from said housing.
Claim 3
Dependent Claim
22 words
The harvester defined in claim 1 wherein said blower further comprises an impeller rotatable between said cutters about a generally horizontal axis.
Claim 4
Dependent Claim
21 words
The harvester defined in claim 2 wherein each cutter comprises a rotor rotatable on said chassis about a respective upright axis;
Claim 5
Dependent Claim
17 words
The harvester defined in claim 3 wherein said housing is cylindrical and centered on said horizontal axis.
Claim 6
Dependent Claim
24 words
The harvester defined in claim 4 wherein said housing has end walls each formed with an orifice opening toward a one of said cutters.
Claim 7
Dependent Claim
26 words
The harvester defined in claim 3 wherein said upright axes and said horizontal axis lie in a common upright plane, said upright axes being suBstantially parallel.
Claim 8
Dependent Claim
54 words
The harvester defined in claim 6, further comprising drive means including an impeller drive shaft carrying said impeller and lying on said horizontal axis, respective rotor drive shafts carrying said rotors and lying on said upright axes, and gears rotationally coupling said rotor shafts to said impeller shaft at the intersections of said axes.
Claim 9
Dependent Claim
12 words
The harvester defined in claim 7 wherein said gears are bevel gears.
Claim 10
Dependent Claim
47 words
The harvester defined in claim 8 wherein said impeller drive shaft carries a pair of such bevel gears and said rotor drive shafts each carry one such bevel gear so meshing with the gears of said impeller shaft as to rotate said rotors in opposite rotational senses.
Claim 11
Dependent Claim
21 words
The harvester defined in claim 8 wherein said upright axes are parallel and extend at right angles to said horizontal axis.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |