Patent DE692198C successfully refreshed from Google Patents.
Patent US3774689A successfully refreshed from Google Patents.
US3774689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tine cultivators with support shields
Assignee: Individual
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Filing: 1971-08-17
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Granted: 1973-11-27
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Expires: 1991-08-17
Abstract
Abstract A cultivator has a frame for attachment to a prime mover, soil working members with tines rotatably mounted below the frame, and one or more screening devices mounted adjacent the soil working members to deflect stones and other debris during operation. Alternate soil working members have discs secured to the tine supports and the supports have inclined elements to deflect debris. A screening plate is positioned at each side of the soil working members and a strip secured to extend along the front of the frame. A soil smoothing roller is pivotably connected to trail the soil working members and adjust the working depth of same.
Inventors
- 👤 Der Lely A Van
- 👤 C Bom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:43
CPC Classifications
A; A01; A01B; A01B33/00; A01B33/08; A01B33/10; A01B33/106; A01B33/12; A01B33/125
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
183 words
A cultivator comprising a frame and coupling means on said frame for attachment to a prime mover, a plurality of soilworking members rotatably mounted on shafts journalled on said frame, said shafts extending in a row transverse to the direction of normal travel of said cultivator, said soil-working members each comprising a substantially horizontal support rotatable on a generally vertical shaft and each support being connected to at least one tine that has a soil-working portion depending downwardly from said support to contact the ground and trace a generally circular path through the soil, screening means mounted on the cultivator and said screening means having an inclined surface that extends across the forward portions of said supports, to guide debris away from the supports, said screening means terminating above the soil-working portions and said screening means being positioned to protect said supports, the upper portions of the tines and their connections from damage by debris encountered during operation while leaving the soilworking portions of the tines exposed and drive means for rotating said soil-working members with a power take-off of said prime mover.
Claim 2
Dependent Claim
183 words
A cultivator comprising a frame and coupling means on said frame for attachment to a prime mover, a plurality of soilworking members rotatably mounted on shafts journalled on said frame, said shafts extending in a row transverse to the direction of normal travel of said cultivator, said soil-working members each comprising a substantially horizontal support rotatable on a generally vertical shaft and each support being connected to at least one tine that has a soil-working portion depending downwardly from said support to contact the ground and trace a generally circular path through the soil, screening means mounted on the cultivator and said screening means having an inclined surface that extends across the forward portions of said supports, to guide debris away from the supports, said screening means terminating above the soil-working portions and said screening means being positioned to protect said supports, the upper portions of the tines and their connections from damage by debris encountered during operation while leaving the soilworking portions of the tines exposed and drive means for rotating said soil-working members with a power take-off of said prime mover.
Claim 3
Dependent Claim
24 words
A cultivator as claimed in claim 1, wherein said screening means includes screening elements that are attached to the forward sides of said supports.
Claim 4
Dependent Claim
46 words
A cultivator as claimed in claim 1, wherein said screening means comprises a screening strip that extends throughout the effective working width of the cultivator at the level of upper portions of the tines and to the front thereof with respect to the direction of travel.
Claim 5
Dependent Claim
51 words
A cultivator as claimed in claim 3, wherein said screening strip comprises a rigid plate which has surfaces inclined to both the vertical and the horizontal whereby the upper extremity of said plate is located further forward with respect to the direction of travel than the lower extremity of said plate.
Claim 6
Dependent Claim
28 words
A cultivator as claimed in claim 4, wherein said screening strip has surfaces which extend downwardly to a level below that of the upper extremities of said tines.
Claim 7
Dependent Claim
46 words
A cultivator as claimed in claim 1, wherein there is a plurality of tines on each support and the supports are elongated and arranged in a row with every other support of the row being parallel to one another and extending normal to their adjacent supports.
Claim 8
Dependent Claim
16 words
A cultivator as claimed in claim 2, wherein each screening element extends substantially horizontally in part.
Claim 9
Dependent Claim
29 words
A cultivator as claimed in claim 7, wherein each support has a tine at each end thereof and a screening element is secured to its support adjacent a tine.
Claim 10
Dependent Claim
29 words
A cultivator as claimed in claim 2, wherein every other tine support is rotatable in a common direction and in a direction contra to that of its neighboring support.
Claim 11
Dependent Claim
30 words
A cultivator as claimed in claim 9, wherein each screening element extends to the front of its respective tine support relative to the direction of rotation of its tine support.
Claim 12
Dependent Claim
38 words
A cultivator as claimed in claim 2, wherein each screening element has parts which are inclined upwardly from the point of connection of said element to its respective tine support to afford protective cover to the tine support.
Claim 13
Dependent Claim
42 words
A cultivator as claImed in claim 11, wherein each screening element extends from one end of its respective tine support to which it is secured, to a location close to the shaft forming the axis about which said tine support is rotatable.
Claim 14
Dependent Claim
30 words
A cultivator as claimed in claim 11, wherein said screening elements have two parts which are located at opposite sides of the shaft about which its respective support is rotatable.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |