Patent US3216509A successfully refreshed from Google Patents.
US3216509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disk harrow
Assignee: Massey Ferguson Inc
•
Filing: 1962-10-15
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Granted: 1965-11-09
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Expires: 1982-10-15
Abstract
No abstract record available.
Inventors
- 👤 Peter J Clifford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:57
CPC Classifications
A; A01; A01B; A01B21/00; A01B21/08; A01B63/00; A01B63/14; A01B63/16; A01B63/22; A01B63/24; A01B63/245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
IN A DISK HARROW OF THE TYPE INCLUDING A CARRIER FRAME AND A DISK GANG MOUNTED THEREON; THE IMPROVEMENT COMPRISING SUSPENSION MEANS INCLUDING A PAIR OF LATERALLY SPACED PRIMARY SUSPENSION ARM MEANS ADJUSTABLY PIVOTALLY MOUNTED ON SAID CARRIER FRAME FOR ADJUSTMENT IN A PLANE SUBSTANTIALLY PARALLEL TO THE DIRECTION OF TRAVEL OF SAID CARRIER FRAME, A PAIR OF SECONDARY SUSPENSION ARM MEANS RESPECTIVELY PIVOTALLY MOUNTED ON SAID PRIMARY SUSPENSION ARMS MEANS FOR ADJUSTMENT RELATIVE THERETO IN A PLANE SUBSTANTIALLY PARALLEL TO THE DIRECTION TO TRAVEL OF SAID CARRIER FRAME, GROUND-ENGAGING WHEEL MEANS ROTATABLY SUPPORTED ON SAID RESPECTIVE SECONDARY SUSPENSION ARM MEANS, AND ADJUSTABLE MEANS COOPERABLE BETWEEN SAID RESPECTIVE PRIMARY AND SECONDARY SUSPENSION ARM MEANS TO SELECTIVELY PIVOTALLY ADJUST THEM RELATIVE TO EACH OTHER.
Claim 2
Dependent Claim
123 words
IN A DISK HARROW OF THE TYPE INCLUDING A CARRIER FRAME AND A DISK GANG MOUNTED THEREON; THE IMPROVEMENT COMPRISING SUSPENSION MEANS INCLUDING A PAIR OF LATERALLY SPACED PRIMARY SUSPENSION ARM MEANS ADJUSTABLY PIVOTALLY MOUNTED ON SAID CARRIER FRAME FOR ADJUSTMENT IN A PLANE SUBSTANTIALLY PARALLEL TO THE DIRECTION OF TRAVEL OF SAID CARRIER FRAME, A PAIR OF SECONDARY SUSPENSION ARM MEANS RESPECTIVELY PIVOTALLY MOUNTED ON SAID PRIMARY SUSPENSION ARMS MEANS FOR ADJUSTMENT RELATIVE THERETO IN A PLANE SUBSTANTIALLY PARALLEL TO THE DIRECTION TO TRAVEL OF SAID CARRIER FRAME, GROUND-ENGAGING WHEEL MEANS ROTATABLY SUPPORTED ON SAID RESPECTIVE SECONDARY SUSPENSION ARM MEANS, AND ADJUSTABLE MEANS COOPERABLE BETWEEN SAID RESPECTIVE PRIMARY AND SECONDARY SUSPENSION ARM MEANS TO SELECTIVELY PIVOTALLY ADJUST THEM RELATIVE TO EACH OTHER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |