Patent US3670824A successfully refreshed from Google Patents.
US3670824A
Expired / Lapsed
US
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Compensation tool bar device
Assignee: Individual
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Filing: 1970-09-16
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Granted: 1972-06-20
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Expires: 1990-09-16
Abstract
Abstract A compensating horizontal tool bar for agricultural implements mounted on a tractor having a ''''three-point hitch'''' is connected to another transverse horizontal support by two parallelogram connectors and a third connector midway between; the connectors include linkages which permit the tool bar to tilt with respect to a central axis while maintaining the bar''s average height substantially constant.
Inventors
- 👤 Houston H Buchanan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:11
CPC Classifications
A; A01; A01B; A01B63/00; A01B63/02; A01B35/00; A01B35/20; A01B35/22; A01B59/00; A01B59/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
150 words
A compensating tool bar implement adapted to be secured to a tractor or the like in connection to the three-point tractor lift arms and the tractor body comprising, in combination at least one elongated tool bar, soil engaging tools carried by the bar and depending therefrom; a parallelogram configurated connection between the center body of the tractor and the tool bar; said parallelogram connection having a pair of vertically spaced generally horizontally disposed arms and at least one upriser secured to said tool bar, said arms and said one upriser being connected for loose pivotal movement; a pair of spaced apart lateral connections between the tool bar and the lift arms; each of said lateral connections comprising a member loosely pivotally connected between the tractor lift arms and the tool bar, said member being disposed in a transverse plane which is angularly related to the transverse planes of said arms.
Claim 2
Dependent Claim
150 words
A compensating tool bar implement adapted to be secured to a tractor or the like in connection to the three-point tractor lift arms and the tractor body comprising, in combination at least one elongated tool bar, soil engaging tools carried by the bar and depending therefrom; a parallelogram configurated connection between the center body of the tractor and the tool bar; said parallelogram connection having a pair of vertically spaced generally horizontally disposed arms and at least one upriser secured to said tool bar, said arms and said one upriser being connected for loose pivotal movement; a pair of spaced apart lateral connections between the tool bar and the lift arms; each of said lateral connections comprising a member loosely pivotally connected between the tractor lift arms and the tool bar, said member being disposed in a transverse plane which is angularly related to the transverse planes of said arms.
Claim 3
Dependent Claim
16 words
The implement of claim 1 wherein said member depends at an angle of 40* to 45*.
Claim 4
Dependent Claim
31 words
The implement of claim 1 wherein said arms of the parallelogram connection each comprise adjustable means for lengthening and shortening the parallelogram configuration to adjust the relative positions of said bars.
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |