Patent US3579948A successfully refreshed from Google Patents.
Patent US3219128A successfully refreshed from Google Patents.
US3219128A
Expired / Lapsed
US
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Soil-tilling device, particularly a plow
Assignee: C Van der Lely NV
•
Filing: 1961-10-09
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Granted: 1965-11-23
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Expires: 1981-10-09
Abstract
No abstract record available.
Inventors
- 👤 Lely Cornelis Van Der
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:47
CPC Classifications
A; A01; A01B; A01B15/00; A01B15/02; A01B15/14; A01B3/00; A01B3/36; A01B3/40; A01B3/42; A01B3/421
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A PLOW COMPRISING A PLOW BEAM HAVING A DOWNWARDLY EXTENDING PORTION, AT LEAST ONE PLOW MEMBER SUPPORTED BY A DOWNWARDLY EXTENDING SUPPORTING ARM, SPRING MEANS CONNECTING SAID PORTION TO SAID SUPPORTING ARM, SAID SPRING MEANS BEING A PAIR OF SPACED RESILIENT MEMBERS EXTENDING IN THE SAME GENERAL DIRECTION AS SAID PORTION AND SAID SUPPORTING ARM, SAID RESILIENT MEMBERS BEING JOINED TO SAID PORTION AND SAID ARM BY SUBSTANTIALLY HORIZONTAL AND SUBSTANTIALLY PARALLEL PARTS, SAID SPRING MEANS BEING THE SOLE CONNECTION BETWEEN THE SAID PORTION AND SAID SUPPORTING ARM, SAID RESILIENT MEMBERS BEING IS CAPABLE OF PERFORMING A PERMANENT MOVEMENT IN A DIRECTION AT LEAST SUBSTANTIALLY PARALLEL TO THE DIRECTION OF TRAVEL OF THE SAID PLOW MEMBER.
Claim 2
Dependent Claim
116 words
A PLOW COMPRISING A PLOW BEAM HAVING A DOWNWARDLY EXTENDING PORTION, AT LEAST ONE PLOW MEMBER SUPPORTED BY A DOWNWARDLY EXTENDING SUPPORTING ARM, SPRING MEANS CONNECTING SAID PORTION TO SAID SUPPORTING ARM, SAID SPRING MEANS BEING A PAIR OF SPACED RESILIENT MEMBERS EXTENDING IN THE SAME GENERAL DIRECTION AS SAID PORTION AND SAID SUPPORTING ARM, SAID RESILIENT MEMBERS BEING JOINED TO SAID PORTION AND SAID ARM BY SUBSTANTIALLY HORIZONTAL AND SUBSTANTIALLY PARALLEL PARTS, SAID SPRING MEANS BEING THE SOLE CONNECTION BETWEEN THE SAID PORTION AND SAID SUPPORTING ARM, SAID RESILIENT MEMBERS BEING IS CAPABLE OF PERFORMING A PERMANENT MOVEMENT IN A DIRECTION AT LEAST SUBSTANTIALLY PARALLEL TO THE DIRECTION OF TRAVEL OF THE SAID PLOW MEMBER.
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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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |