Patent US3815528A successfully refreshed from Google Patents.
US3815528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agricultural dry chemical underground applicator tool combination
Assignee: Hawkins Manufacturing Inc
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Filing: 1972-07-03
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Granted: 1974-06-11
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Expires: 1992-07-03
Abstract
Abstract An Agricultural Tool and dry granular chemical Applicator Combination comprising a horizontally underground moveable 1/2 rhombus blade adapted on such movement for forming a momentary underground air-vacuum-like pocket for gravity receiving granular dry chemical particles into that vacuum-like pocket and for thereby effecting distribution of said chemicals throughout that pocket.
Inventors
- 👤 R Hawkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 00:52
CPC Classifications
A; A01; A01C; A01C5/00; A01C5/06; A01C21/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
221 words
In an agricultural chemical underground applicator tool having a frame adapted to be adjustably mounted on a tractor, a wedge-shaped blade means of 1/2 rhombus shape in a horizontal plane and having a forward point, rearwardly and outwardly diverging bottom edges and a center ridge extending rearwardly and upwardly from said forward point, said blade means being carried by an elongated support post on the frame for forward movement completely under the surface of the ground such that said blade means will create an open space under the ground and a momentary vacuum in said open space, said support post being of sufficiently narrow width so as not to form an open trench, supply means secured to said blade means for directing a supply of granular chemical into said open space as said vacuum is formed therein, divider means positioned beneath said supply means and within said open space to disperse granular chemical from said supply means into said open space, whereby the momentary vacuum formed in said open space serves to further disperse the granular chemical therein, means mounted on the frame rearwardly of said blade means for gathering soil on the ground surface behind said blade means, and means mounted on the frame rearwardly of said soil gathering means to compress the soil gathered by said soil gathering means.
Claim 2
Dependent Claim
221 words
In an agricultural chemical underground applicator tool having a frame adapted to be adjustably mounted on a tractor, a wedge-shaped blade means of 1/2 rhombus shape in a horizontal plane and having a forward point, rearwardly and outwardly diverging bottom edges and a center ridge extending rearwardly and upwardly from said forward point, said blade means being carried by an elongated support post on the frame for forward movement completely under the surface of the ground such that said blade means will create an open space under the ground and a momentary vacuum in said open space, said support post being of sufficiently narrow width so as not to form an open trench, supply means secured to said blade means for directing a supply of granular chemical into said open space as said vacuum is formed therein, divider means positioned beneath said supply means and within said open space to disperse granular chemical from said supply means into said open space, whereby the momentary vacuum formed in said open space serves to further disperse the granular chemical therein, means mounted on the frame rearwardly of said blade means for gathering soil on the ground surface behind said blade means, and means mounted on the frame rearwardly of said soil gathering means to compress the soil gathered by said soil gathering means.
Claim 3
Dependent Claim
24 words
The applicator tool of claim 1 wherein said blade means, rearwardly of said forward point, is of 1/2 rhombus shape in a vertical plane.
Claim 4
Dependent Claim
27 words
The applicator tool of claim 1 wherein said supply means is a gravity feed tube having its outlet positioned substantially at the mid-portion of said blade means.
Claim 5
Dependent Claim
21 words
The applicator tool of claim 3 wherein said divider means comprises a divider bar extending longitudinally under said feed tube outlet.
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |