US4019278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the application of chemicals to field crops and/or other plant concentrations
Assignee: Individual
•
Filing: 1976-02-19
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Granted: 1977-04-26
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Expires: 1996-02-19
Abstract
Abstract Normally crops are sprayed with herbicide or the like by means of expensive and heavy spray bar equipment pulled or carried behind a tractor. The present device comprises a pair of spaced and parallel bars which include porous tubes or wick-like devices connected to a tank of herbicide or other chemical so that a film of the liquid chemical is maintained on the surface of the tubes. These are mounted transversely behind a tractor together with a supply tank and the tubes can be raised and lowered relative to the ground so that they can be drawn across the crops and adjusted so that the tubes engage the weeds but not the crops as the weeds normally grow higher than the crops in the initial growth stages.
Inventors
- 👤 James A. McKirdy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:27
CPC Classifications
A; A01; A01M; A01M7/00; A01M7/005; A01M7/0053; A01M21/00; A01M21/04; A01M21/043
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
268 words
A weed bar assembly for use with a liquid such as a herbicide or the like adapted to be supported upon a source of power such as a tractor, said source of power including a source of hydraulic pressure; comprising in combination supporting framework, said supporting framework adapted to be operatively connected to said source of power, a tank associated with said framework for holding a supply of liquid, at least one hollow weed bar assembly supported transversely by said supporting framework and extending upon each side thereof means to adjust the height of said week bar assembly relative to the ground, means operatively connecting said tank with the interior of said weed bar assembly, said weed bar assembly including means in the wall thereof for feeding said liquid through the wall to maintain a film of said liquid upon the outer surface of said wall, said weed bar assembly including a pair of spaced and parallel tubes, means to adjust the fore and aft relationship of said tubes relative to the ground, said means to adjust the height of said weed bar assembly relative to the ground including a pair of links pivoted by one end theeof to said supporting structure and being pivotally connected by the other ends thereof to said wee bar assembly, and a fluid operator extending between said supporting framework and said weed bar assembly and being operatively connected to said source of hydraulic pressure whereby extension and retraction of said fluid operator pivots said links around said one end thereof thereby raising and lowering said weed bar assembly relative to the ground.
Claim 2
Dependent Claim
268 words
A weed bar assembly for use with a liquid such as a herbicide or the like adapted to be supported upon a source of power such as a tractor, said source of power including a source of hydraulic pressure; comprising in combination supporting framework, said supporting framework adapted to be operatively connected to said source of power, a tank associated with said framework for holding a supply of liquid, at least one hollow weed bar assembly supported transversely by said supporting framework and extending upon each side thereof means to adjust the height of said week bar assembly relative to the ground, means operatively connecting said tank with the interior of said weed bar assembly, said weed bar assembly including means in the wall thereof for feeding said liquid through the wall to maintain a film of said liquid upon the outer surface of said wall, said weed bar assembly including a pair of spaced and parallel tubes, means to adjust the fore and aft relationship of said tubes relative to the ground, said means to adjust the height of said weed bar assembly relative to the ground including a pair of links pivoted by one end theeof to said supporting structure and being pivotally connected by the other ends thereof to said wee bar assembly, and a fluid operator extending between said supporting framework and said weed bar assembly and being operatively connected to said source of hydraulic pressure whereby extension and retraction of said fluid operator pivots said links around said one end thereof thereby raising and lowering said weed bar assembly relative to the ground.
Claim 3
Dependent Claim
29 words
The weed bar assembly according to claim 1 in which said means in said wall for feeding said liquid therethrough includes said tube being formed of a porous material.
Claim 4
Dependent Claim
72 words
The weed bar assembly according to claim 2 in which said means to adjust the fore and aft relationship of said assembly relative to the ground includes an arcuate support bracket extending between said links and said assembly and means to adjust and selectively hold the position of said arcuate support relative to the said links whereby said assembly is rocked fore and aft to the desired position relative to the ground.
Claim 5
Dependent Claim
22 words
The assembly according to claim 3 in which said tubes are journalled for free rotation around the longitudinal axis of said tube.
Claim 6
Dependent Claim
22 words
The assembly according to claim 2 in which said tubes are journaled for free rotation around the longitudinal axes of said tubes.
Claim 7
Dependent Claim
45 words
The weed bar assembly according to claim 1 in which said means in the wall for feeding said liquid through said wall includes an absorbent wick-like cover surrounding said tube and liquid feed means extending through the wall of said tube along the length thereof.
Claim 8
Dependent Claim
72 words
The weed bar assembly according to claim 6 in which said means to adjust the fore and aft relationship of said assembly relative to the ground includes an arcuate support bracket extending between said links and said assembly and means to adjust and selectively hold the position of said arcuate support relative to the said links whereby said assembly is rocked fore and aft to the desired position relative to the ground.
Claim 9
Dependent Claim
22 words
The assembly according to claim 7 in which said tubes are journalled for free rotation around the longitudinal axis of said tube.
Claim 10
Dependent Claim
22 words
The assembly according to claim 6 in which said tubes are journalled for free rotation around the longitudinal axes of said tubes.
Claim 11
Dependent Claim
72 words
The weed bar assembly according to claim 1 in which said means to adjust the fore and aft relationship of said assembly relative to the ground includes an arcuate support bracket extending between said links and said assembly and means to adjust and selectively hold the position of said arcuate support relative to the said links whereby said assembly is rocked fore and aft to the desired position relative to the ground.
Claim 12
Dependent Claim
22 words
The assembly according to claim 10 in which said tubes are journalled for free rotation around the longitudinal axis of said tube.
Claim 13
Dependent Claim
22 words
The assembly according to claim 1 in which said tubes ae journalled for free rotation around the longitudinal axis of said tube.
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) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |