Patent US3173494A successfully refreshed from Google Patents.
US3173494A
Expired / Lapsed
US
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Overload release trip for cultivator shanks
Assignee: Individual
•
Filing: 1963-04-04
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Granted: 1965-03-16
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Expires: 1983-04-04
Abstract
No abstract record available.
Inventors
- 👤 Herbert W Padwick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:07
CPC Classifications
A; A01; A01B; A01B61/00; A01B61/04; A01B61/044; A01B61/046; A01B35/00; A01B35/20; A01B35/22; A01B35/24
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
144 words
IN A SOIL WORKING IMPLEMENT HAVING A CROSS BAR ON WHICH THE UPPER END OF A SHANK FOR CARRYING SOIL WORKING ELEMENTS IS MOUNTED AND INCLUDING A BASE PLATE ATTACHED ON THE UNDER SIDE OF THE CROSS BAR AND TO WHICH THE SHANK IS PIVOTALLY MOUNTED REARWARDLY OF THE CROSS BAR WITH THE FOWARD END PORTION OF THE SHANK EXENDING IN ADVANCE OF THE CROSS BAR, OVERLOAD RELEASE MEANS ENGAGING THE FORWARD END OF THE SHANK WITH THE BASE PLATE, SAID MEANS COMPRISING AN UPSTANDING ARM ATTACHED TO THE FORWARD END OF THE SHANK, A ROLLER MOUNTED ON THE UPPER END OF THE ARM, AND INTEGRAL MEANS ON HTE FORWARD END PORTION OF THE BASE PLATE WITH WHICH THE ROLLER IS ENGAGEABLE TO OPPOSE REARWARD UPWARD PIVOTAL MOVEMENT OF THE SHANK AND FROM WHICH THE ROLLER MAY DISENGAGE BY UPWARD PRESSURE ON THE SHANK.
References Cited (Backward Citations)
US2857833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |