US3402773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring trip for implements
Assignee: Case LLC
•
Filing: 1966-01-26
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Granted: 1968-09-24
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Expires: 1986-01-26
Abstract
No abstract record available.
Inventors
- 👤 Marvin D Jennings
- 👤 Benjamin A Shader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:56
CPC Classifications
A; A01; A01B; A01B61/00; A01B61/04; A01B61/044; A01B61/046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
IN AN IMPLEMENT A SHANK HAVING A TRANSVERSE PIVOT PIN MOUNTED IN ITS LOWER END, AN EARTH PENETRATING TOOL MOUNTED ON SAID PIVOT PIN FOR TRIPPING ABOUT THE AXIS THEREOF FROM AN OPERATING TO A TRIPPED POSITION, YIELDABLE MEANS OPPOSING THE TRIPPING OF SAID TOOL COMPRISING A LEAF SPRING HAVING ONE END ANCHORED TO SAID SHANK AND A PLURALITY OF COILS HELICALLY ARRANGED ABOUT THE AXIS OF SAID PIVOT PIN, MEANS SECURING THE OTHER END OF SAID SPRING TO THE SHANK AT A LOCATION REMOTE FROM SAID PIVOT PIN, SAID SPRING HAVING MEANS FORMING AN ABUTMENT THEREON, AND A STOP MEMBER MOUNTED ON SAID TOOL AND ENGAGEABLE WITH SAID ABUTMENT TO HOLD THE TOOL AGAINST TRIPPING IN THE NORMAL OPERATION THEREOF, SAID SPRING BEING YIELDABLE RADIALLY IN RESPONSE TO ABNORMAL DRAFT FORCES ACTING ON SAID TOOL DURING OPERATION TO CAUSE SAID STOP MEMBER TO RIDE OVER SAID ABUTMENT AND ACCOMMODATE TRIPPING OF THE TOOL.
Claim 2
Dependent Claim
154 words
IN AN IMPLEMENT A SHANK HAVING A TRANSVERSE PIVOT PIN MOUNTED IN ITS LOWER END, AN EARTH PENETRATING TOOL MOUNTED ON SAID PIVOT PIN FOR TRIPPING ABOUT THE AXIS THEREOF FROM AN OPERATING TO A TRIPPED POSITION, YIELDABLE MEANS OPPOSING THE TRIPPING OF SAID TOOL COMPRISING A LEAF SPRING HAVING ONE END ANCHORED TO SAID SHANK AND A PLURALITY OF COILS HELICALLY ARRANGED ABOUT THE AXIS OF SAID PIVOT PIN, MEANS SECURING THE OTHER END OF SAID SPRING TO THE SHANK AT A LOCATION REMOTE FROM SAID PIVOT PIN, SAID SPRING HAVING MEANS FORMING AN ABUTMENT THEREON, AND A STOP MEMBER MOUNTED ON SAID TOOL AND ENGAGEABLE WITH SAID ABUTMENT TO HOLD THE TOOL AGAINST TRIPPING IN THE NORMAL OPERATION THEREOF, SAID SPRING BEING YIELDABLE RADIALLY IN RESPONSE TO ABNORMAL DRAFT FORCES ACTING ON SAID TOOL DURING OPERATION TO CAUSE SAID STOP MEMBER TO RIDE OVER SAID ABUTMENT AND ACCOMMODATE TRIPPING OF THE TOOL.
References Cited (Backward Citations)
US290366A
Cited
US1194006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |