US3977476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soil cultivating implements
Assignee: Individual
•
Filing: 1974-08-08
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Granted: 1976-08-31
•
Expires: 1994-08-08
Abstract
Abstract An agricultural implement combination has a forward cultivator with soil working blades that rotate about a horizontal axis extending transverse to the direction of travel and a rear harrow having tined soil working members that rotate about upwardly extending shafts positioned in a row also extending transverse to the direction of travel. The cultivator and harrow each have a coupling member and their coupling members are linked by pairs of arms that cross one another when the implement is viewed from the side. A driving system includes a separate transmisson with change speed gearing for the cultivator and the harrow and the input shaft of the cultivator is connectable to a prime mover p.t.o. A telescope shaft connection bridges the two transmissions so that the blades of the cultivator and the tined members of the harrow can be driven from a single p.t.o. The harrow preferably has a supporting roller at the rear to smooth the soil worked first by the cultivator and then by the harrow. The latter can be set by adjusting the roller's connection to the harrow, to work deeper than the layer of soil worked by the cultivator.
Inventors
- 👤 Cornelis van der Lely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:57
CPC Classifications
A; A01; A01B; A01B33/00; A01B33/06; A01B33/065; A01B49/00; A01B49/02; A01B49/022; A01B49/025
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
152 words
An agricultural implement movable over the ground comprising a combination of a rotary cultivator and a rotary harrow, said rotary cultivator being arranged in front of said rotary harrow and having a frame supporting a plurality of soil working elements rotatably mounted on a substantially horizontal transverse axis, said harrow comprising a frame portion supporting a plurality of soil working members arranged in a transverse row and rotatably mounted on corresponding upwardly extending axes, a first upwardly extending coupling member being connected to the front of said frame, a second upwardly extending coupling member being connected to said frame portion said coupling members being interconnected by pivoted arms, said cultivator and said harrow being vertically movable with respect to one another during travel, a driving system being in driving engagement with said elements via a transmission of said cultivator and with the soil working members via a further transmission of said harrow.
Claim 2
Dependent Claim
152 words
An agricultural implement movable over the ground comprising a combination of a rotary cultivator and a rotary harrow, said rotary cultivator being arranged in front of said rotary harrow and having a frame supporting a plurality of soil working elements rotatably mounted on a substantially horizontal transverse axis, said harrow comprising a frame portion supporting a plurality of soil working members arranged in a transverse row and rotatably mounted on corresponding upwardly extending axes, a first upwardly extending coupling member being connected to the front of said frame, a second upwardly extending coupling member being connected to said frame portion said coupling members being interconnected by pivoted arms, said cultivator and said harrow being vertically movable with respect to one another during travel, a driving system being in driving engagement with said elements via a transmission of said cultivator and with the soil working members via a further transmission of said harrow.
Claim 3
Dependent Claim
33 words
An implement as claimed in claim 1, wherein said elements are blades that are set to work the soil at a lesser depth than tines of said soil working members of said harrow.
Claim 4
Dependent Claim
40 words
An implement as claimed in claim 1, wherein an input shaft of said driving system is connected to the transmission of said cultivator and the further transmission of said harrow is connected to the rear of said first mentioned transmission.
Claim 5
Dependent Claim
81 words
An implement as claimed in claim 1, wherein said harrow comprises a plurality of tined soil working members that are positioned side by side in a row and said driving system is connected to rotate each soil working member in a direction opposite to that of an adjacent soil working member, said tined soil working members being positioned to work overlapping strips of soil and the working width of said cultivator being substantially equal to the working width of said harrow.
Claim 6
Dependent Claim
57 words
An implement as claimed in claim 1, wherein said arms include a first pair of rearwardly converging arms which extend from a lower portion of said first coupling member, and a second pair of substantially parallel arms that extend from the upper portion of said first coupling member to the lower portion of said second coupling member.
Claim 7
Dependent Claim
160 words
An agricultural implement movable over the ground comprising a combination of a rotary cultivator and a rotary harrow, said rotary cultivator being arranged in front of said rotary harrow and having a frame supporting a plurality of soil working blade elements rotatably mounted on a substantially horizontal transverse axis, said harrow comprising a frame portion supporting a plurality of soil working tined members arranged in a row and said tined members being rotatably mounted on corresponding upwardly extending axes, a first upwardly extending coupling member being connected to the front of said frame and a second upwardly extending coupling member being connected to the front of said frame portion, said coupling members being interconnected by pivoted arms, said cultivator and said harrow being vertically movable with respect to one another during travel, a driving system being in driving engagement with said elements via a transmission of said cultivator and with the tined members via a further transmission of said harrow.
Claim 8
Dependent Claim
160 words
An agricultural implement movable over the ground comprising a combination of a rotary cultivator and a rotary harrow, said rotary cultivator being arranged in front of said rotary harrow and having a frame supporting a plurality of soil working blade elements rotatably mounted on a substantially horizontal transverse axis, said harrow comprising a frame portion supporting a plurality of soil working tined members arranged in a row and said tined members being rotatably mounted on corresponding upwardly extending axes, a first upwardly extending coupling member being connected to the front of said frame and a second upwardly extending coupling member being connected to the front of said frame portion, said coupling members being interconnected by pivoted arms, said cultivator and said harrow being vertically movable with respect to one another during travel, a driving system being in driving engagement with said elements via a transmission of said cultivator and with the tined members via a further transmission of said harrow.
Claim 9
Dependent Claim
177 words
An agricultural implement comprising a combination of a rotary cultivator and a rotary harrow, said cultivator being arranged in front of said rotary harrow and having a frame supporting a plurality of soil working elements rotatably mounted on a substantially horizontal transverse axis, said harrow comprising a frame portion supporting a plurality of soil working tined members arranged in a transverse row and said tined members being rotatably mounted on corresponding upwardly extending axes, a first upwardly extending coupling member being connected to the front of said frame and a second upwardly extending coupling member being connected to the front of said frame portion, said coupling members being interconnected by pivoted arms that link the upper portion of said first coupling member to the lower portion of said second coupling member and vice versa, said cultivator and said harrow being vertically movable with respect to one another during operation, a driving system being in driving engagement with said elements via a transmission of said cultivator and with said tined members via a further transmission of said harrow.
Claim 10
Dependent Claim
177 words
An agricultural implement comprising a combination of a rotary cultivator and a rotary harrow, said cultivator being arranged in front of said rotary harrow and having a frame supporting a plurality of soil working elements rotatably mounted on a substantially horizontal transverse axis, said harrow comprising a frame portion supporting a plurality of soil working tined members arranged in a transverse row and said tined members being rotatably mounted on corresponding upwardly extending axes, a first upwardly extending coupling member being connected to the front of said frame and a second upwardly extending coupling member being connected to the front of said frame portion, said coupling members being interconnected by pivoted arms that link the upper portion of said first coupling member to the lower portion of said second coupling member and vice versa, said cultivator and said harrow being vertically movable with respect to one another during operation, a driving system being in driving engagement with said elements via a transmission of said cultivator and with said tined members via a further transmission of said harrow.
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) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |