US3576213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Farm implement
Assignee: Individual
•
Filing: 1969-03-12
•
Granted: 1971-04-27
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Expires: 1989-03-12
Abstract
Abstract A farm implement having a frame which carries a cultivator and a rod weeder assembly, the latter including a weeder rod which is drawn through the soil loosened by the former. The height of the cultivator relative to the ground is variable, while the height of the weeder rod is variable relative to the cultivator. Consequently, the cultivator may be used independently of the rod weeder assembly.
Inventors
- 👤 David B Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:54
CPC Classifications
A; A01; A01B; A01B49/00; A01B49/02; A01B49/022; A01B39/00; A01B39/12; A01B39/18; A01B39/19; A01B63/00; A01B63/14; A01B63/24; A01B63/32
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
258 words
A farm implement for working soil; said implement comprising a frame; cultivator means on the frame for loosening the soil; height-adjusting means on the frame for altering the height of the cultivator means with respect to the soil; a plurality of parallel linkage arrangements positioned on the frame, each linkage arrangement including an upright standard mounted rigidly on the frame, a lift arm pivoted relative to the frame at the upright standard, a connecting bar pivotally connected to the standard and presented generally parallel to the lift arm, and a rod weeder shank extending between and pivotally connected to the lift arm and connecting bar at spaced locations, the shank being generally parallel to the upright standard; a weeder rod supported by the rod weeder shank for rotation relative thereto and extending generally transversely of the frame; drive means for rotating the weeder rod and including a first sprocket on the weeder rod at at least one of the rod weeder shanks, a second sprocket on the rod weeder shank at which the first sprocket is located and being located upwardly therefrom, a chain trained over the sprockets, power transfer means on the shank and connected to the second sprocket, and a telescopic drive shaft extending between the power transfer means and the frame; and actuating means connected with the parallel linkage arrangements for pivoting the connecting bars and lifting arms so as to move the rod weeder shanks in a generally vertical direction, whereby the height of the weeder rod relative to the cultivator means is adjusted.
Claim 2
Dependent Claim
258 words
A farm implement for working soil; said implement comprising a frame; cultivator means on the frame for loosening the soil; height-adjusting means on the frame for altering the height of the cultivator means with respect to the soil; a plurality of parallel linkage arrangements positioned on the frame, each linkage arrangement including an upright standard mounted rigidly on the frame, a lift arm pivoted relative to the frame at the upright standard, a connecting bar pivotally connected to the standard and presented generally parallel to the lift arm, and a rod weeder shank extending between and pivotally connected to the lift arm and connecting bar at spaced locations, the shank being generally parallel to the upright standard; a weeder rod supported by the rod weeder shank for rotation relative thereto and extending generally transversely of the frame; drive means for rotating the weeder rod and including a first sprocket on the weeder rod at at least one of the rod weeder shanks, a second sprocket on the rod weeder shank at which the first sprocket is located and being located upwardly therefrom, a chain trained over the sprockets, power transfer means on the shank and connected to the second sprocket, and a telescopic drive shaft extending between the power transfer means and the frame; and actuating means connected with the parallel linkage arrangements for pivoting the connecting bars and lifting arms so as to move the rod weeder shanks in a generally vertical direction, whereby the height of the weeder rod relative to the cultivator means is adjusted.
Claim 3
Dependent Claim
50 words
A farm implement according to claim 1 wherein the actuating means comprises a rockshaft journaled on the frame adjacent to the upright standards and having the lift arms secured rigidly thereto, and means for rotating the rockshaft so as to change the angular relationship between the frame and lift arms.
Claim 4
Dependent Claim
44 words
A farm implement according to claim 1 wherein the means for rotating the rockshaft comprises an actuating arm projecting outwardly from the shaft and a fluid-operated cylinder connected at its one end to the actuating arm and at its opposite end to the frame.
Claim 5
Dependent Claim
47 words
A farm implement according to claim 1 wherein the height-adjusting means comprises a rock shaft journaled on the frame, parallel suspension arms extending generally rearwardly and downwardly from the rock shaft, wheels on the lower ends of the suspension arms, and means for rotating the rock shaft.
Claim 6
Dependent Claim
52 words
A farm implement according to claim 2 wherein the first height-adjusting means comprises another rock shaft journaled on the frame, parallel suspension arms on the other rock shaft and extending generally rearwardly and downwardly therefrom, wheels on the lower ends of the suspension arms, and means for rotating the other rock shaft.
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) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |