US4185699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soil contact tool
Assignee: J T ACQUISITION Corp
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Filing: 1978-04-07
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Granted: 1980-01-29
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Expires: 1998-04-07
Abstract
Abstract This invention relates to an improved soil contact tool comprised of a narrow uniform width ground engaging section and a triangular moldboard section extending therefrom. The moldboard section has a center to direct soil away from the mold board with sides being generally concave to insure transverse movement of the soil to create ridges on either side of the ground working tool.
Inventors
- 👤 Howard L. Lewison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:42
CPC Classifications
A; A01; A01B; A01B35/00; A01B35/20; A01C; A01C5/00; A01C5/06; A01C5/062
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
169 words
A soil contact tool adapted to be mounted on and forwardly of a curved tool mounting shank comprising, a composite tool formed of a narrow ground engaging section having a forwardly facing working surface of narrow uniform width and further having a pointed tip and a moldboard section shaped triangularly when considered in a plane extending generally along its length and extending above and outwardly from the ground engaging section, said triangular moldboard section having a smaller centrally located triangular portion defined by a pair of forwardly facing working surfaces individually convex in shape and meeting at a center line of said moldboard section and having outwardly disposed concavely shaped side portions forming a V-shape with said centrally located triangular portion, and means in one of said sections for mounting the tool on the end of the curved tool shank, said tool being curved along its extent to be positioned forward of the shank with the ground engaging section extending below and forward of the end of the shank.
Claim 2
Dependent Claim
169 words
A soil contact tool adapted to be mounted on and forwardly of a curved tool mounting shank comprising, a composite tool formed of a narrow ground engaging section having a forwardly facing working surface of narrow uniform width and further having a pointed tip and a moldboard section shaped triangularly when considered in a plane extending generally along its length and extending above and outwardly from the ground engaging section, said triangular moldboard section having a smaller centrally located triangular portion defined by a pair of forwardly facing working surfaces individually convex in shape and meeting at a center line of said moldboard section and having outwardly disposed concavely shaped side portions forming a V-shape with said centrally located triangular portion, and means in one of said sections for mounting the tool on the end of the curved tool shank, said tool being curved along its extent to be positioned forward of the shank with the ground engaging section extending below and forward of the end of the shank.
Claim 3
Dependent Claim
31 words
The soil contact tool of claim 1 in which the convex surfaces of said smaller centrally located triangular shaped portion merge with said concave surfaces of said concavely shaped side portions.
Claim 4
Dependent Claim
26 words
The soil contact tool of claim 2 in which all portions of the composite tool are forward of the curved tool mounting shank when mounted thereon.
Claim 5
Dependent Claim
24 words
The soil contact tool of claim 3 in which the triangular shaped moldboard section has a curvature less than the curvature of the shank.
Claim 6
Dependent Claim
31 words
The soil contact tool of claim 1 and including a base member having a width less than the ground engaging section and mounting the tool on the end of the shank.
Claim 7
Dependent Claim
29 words
The soil contact tool of claim 5 in which the ground engaging section and the triangular shaped moldboard section are separate components secured to the end of the shank.
Claim 8
Dependent Claim
30 words
The soil contact tool of claim 5 in which the triangular moldboard section adjacent the ground engaging section has a flat surface leading to the convex center and concave sides.
Claim 9
Dependent Claim
38 words
The soil contact tool of claim 7 in which the ground engaging section and the portion of the moldboard having a flat surface have a uniform curvature substantially equal to the curvature of the curved tool mounting shank.
References Cited (Backward Citations)
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Cited
US395573A
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US418389A
Cited
US790746A
Cited
US1099765A
Cited
US1205416A
Cited
US1656133A
Cited
US2779263A
Cited
US3762483A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-28 | 1983-07-30 | 1984-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-28 | 1987-07-30 | 1988-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-28 | 1991-07-30 | 1992-01-29 | $7700.00 | Window Closed / Lapsed |