US3209841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Earth working tool having a torsion spring support
Assignee: C Van der Lely NV
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Filing: 1961-09-06
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Granted: 1965-10-05
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Expires: 1981-09-06
Abstract
No abstract record available.
Inventors
- 👤 Lely Cornelis Van Der
- 👤 Lely Ary Van Der
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:12
CPC Classifications
A; A01; A01B; A01B35/00; A01B35/20; A01B35/22; A01B35/24; A01B23/00; A01B23/02; A01B35/02; A01B35/10; A01B35/12; A01B49/00; A01B49/02; A01B49/027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A SOIL-WORKING DEVICE COMPRISING A SUPPORTING MEMBER FOR SOIL PENETRATING MEANS INCLUDING A PAIR OF RODSHAPED ELEMENTS FOR CONNECTION TO THE SOIL PENETRATING MEANS, A PAIR OF RESILIENT TORSION PORTIONS EXTENDING IN SUBSTANTIALLY OPPOSITE DIRECTIONS AT RIGHT ANGLES FROM SAID SUPPORTING ELEMENTS, AND A PAIR OF SECURING PORTIONS GENERALLY PARALLEL TO THE SUPPORTING ELEMENTS EXTENDING FROM THE FREE ENDS OF SAID TORSION PORTIONS FOR SECURING THE SUPPORTING MEMBERS TO SAID DEVICE, SAID TORSION PORTIONS LYING SUBSTANTIALLY IN A PLANE WHICH IS TRANSVERSE TO THE EXPECTED FORCE FROM THE SOIL ACTING ON SAID PENETRATING MEANS WHEN WORKING THE SOIL.
Claim 2
Dependent Claim
98 words
A SOIL-WORKING DEVICE COMPRISING A SUPPORTING MEMBER FOR SOIL PENETRATING MEANS INCLUDING A PAIR OF RODSHAPED ELEMENTS FOR CONNECTION TO THE SOIL PENETRATING MEANS, A PAIR OF RESILIENT TORSION PORTIONS EXTENDING IN SUBSTANTIALLY OPPOSITE DIRECTIONS AT RIGHT ANGLES FROM SAID SUPPORTING ELEMENTS, AND A PAIR OF SECURING PORTIONS GENERALLY PARALLEL TO THE SUPPORTING ELEMENTS EXTENDING FROM THE FREE ENDS OF SAID TORSION PORTIONS FOR SECURING THE SUPPORTING MEMBERS TO SAID DEVICE, SAID TORSION PORTIONS LYING SUBSTANTIALLY IN A PLANE WHICH IS TRANSVERSE TO THE EXPECTED FORCE FROM THE SOIL ACTING ON SAID PENETRATING MEANS WHEN WORKING THE SOIL.
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) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |