Patent US4099576A successfully refreshed from Google Patents.
US4099576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-speed agricultural disc
Assignee: MARCHESAN Corp A CORP OF WASHINGTON
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Filing: 1977-06-27
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Granted: 1978-07-11
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Expires: 1997-06-27
Abstract
Abstract By providing a circular, dished agricultural disc with peripheral V-shaped notches and intervening ovate-shaped openings, the disc may be operated at relatively high speeds while still achieving vigorous cutting, stirring and mixing of the soil. At the same time, excessive throwing of soil is avoided, thereby preventing soil accumulation into high ridges with wide furrows inbetween.
Inventors
- 👤 Atiq A. Jilani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:49
CPC Classifications
A; A01; A01B; A01B23/00; A01B23/06; A01B15/00; A01B15/16
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
48 words
A circular, dished earth-cutting agricultural disc having a series of equally-spaced, generally V-shaped notches around its circular periphery, with a radially-extending, generally ovate-shaped opening between each pair of adjacent notches, the wider end of each opening being radially outermost and extending outwardly beyond the bottoms of the notches.
Claim 2
Dependent Claim
48 words
A circular, dished earth-cutting agricultural disc having a series of equally-spaced, generally V-shaped notches around its circular periphery, with a radially-extending, generally ovate-shaped opening between each pair of adjacent notches, the wider end of each opening being radially outermost and extending outwardly beyond the bottoms of the notches.
Claim 3
Dependent Claim
17 words
An agricultural disc according to claim 1 wherein the bottom of each V-shaped peripheral notch is rounded.
Claim 4
Dependent Claim
15 words
An agricultural disc according to claim 1 wherein each V-shaped peripheral notch is flat bottomed.
Claim 5
Dependent Claim
23 words
An agricultural disc according to claim 1 wherein the radial length of each opening is greater than the radial depth of each notch.
Claim 6
Dependent Claim
22 words
An agricultural disc according to claim 1 whose ratio of disc diameter to concavity is in the range from 9 to 13.
Claim 7
Dependent Claim
22 words
An agricultural disc according to claim 1 wherein each unnotched peripheral portion is arcuate shaped and tapered to form a cutting edge.
Claim 8
Dependent Claim
21 words
An agricultural disc according to claim 1 wherein the edge of each notched portion is tapered to provide a cutting edge.
Claim 9
Dependent Claim
38 words
An agricultural disc according to claim 1 wherein the edge of each notched portion is tapered to provide a tapered surface which meets one side of the disc at a variable acute angle to form a cutting edge.
Claim 10
Dependent Claim
14 words
An agricultural disc according to claim 8 wherein the tapered surfaces are sheared surfaces.
Claim 11
Dependent Claim
38 words
An agricultural disc according to claim 1 wherein the edge of each ovate-shaped opening is tapered to provide a tapered surface which meets one side of the disc at a variable acute angle to form a cutting edge.
Claim 12
Dependent Claim
49 words
An agricultural disc according to claim 1 wherein the narrow end of each ovate-shaped opening is radially inward with respect to the bottoms of the peripheral notches, the openings forming a second set of generally V-shaped notches when the disc wears down to the bottoms of the peripheral notches.
References Cited (Backward Citations)
US9169A
Cited
US29342A
Cited
US514210A
Cited
US1195710A
Cited
US865294A
Cited
US1113241A
Cited
US1214882A
Cited
US1879193A
Cited
US2686395A
Cited
GB986352A
Cited
US3213514A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |