Patent US3387861A successfully refreshed from Google Patents.
US3387861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Implement duplex hitch
Assignee: Case LLC
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Filing: 1966-11-10
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Granted: 1968-06-11
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Expires: 1986-11-10
Abstract
No abstract record available.
Inventors
- 👤 Jack L Bauman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:28
CPC Classifications
A; A01; A01B; A01B59/00; A01B59/04; A01B59/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
IN A TRACTOR DRAWN DUPLEX IMPLEMENT HAVING TRANSVERSELY SPACED UNITS, HITCH MEANS FOR CONNECTING THE IMPLEMENT TO THE TRACTOR IN DRAFT-RECEIVING RELATION FOR INDEPENDENT VERTICAL MOVEMENT OF SAID UNITS AND FOR OPTIONALLY SHIFTING ONE UNIT TO A TANDEM RELATION WITH THE OTHER UNIT TO FACILITATE TRANSPORTING THE IMPLEMENT COMPRISING, DRAWBAR MEANS EXTENDING FORWARDLY FROM EACH OF SAID UNITS INCLUDING AN INWARDLY EXTENDING PART, A DRAFT MEMBER PIVOTALLY CONNECTED TO EACH OF SAID UNITS AND EXTENDING FORWARDLY IN SLIDING RELATION TO THE RESPECTIVE OF SAID DRAWBAR MEANS FOR LATERAL SWINGING BETWEEN POSITIONS IN FORWARDLY CONVERGING RELATION FOR PIVOTAL CONNECTION TO THE TRACTOR FOR OPERATION OF THE IMPLEMENT AND POSITIONS SUBSTANTIALLY PARALLEL TO THE LINE OF TRAVEL OF SAID UNITS, MEANS FOR RELEASABLY LOCKING SAID DRAFT MEMBERS TO SAID DRAWBAR MEANS TO PREVENT SAID LATERAL
Claim 2
Dependent Claim
133 words
IN A TRACTOR DRAWN DUPLEX IMPLEMENT HAVING TRANSVERSELY SPACED UNITS, HITCH MEANS FOR CONNECTING THE IMPLEMENT TO THE TRACTOR IN DRAFT-RECEIVING RELATION FOR INDEPENDENT VERTICAL MOVEMENT OF SAID UNITS AND FOR OPTIONALLY SHIFTING ONE UNIT TO A TANDEM RELATION WITH THE OTHER UNIT TO FACILITATE TRANSPORTING THE IMPLEMENT COMPRISING, DRAWBAR MEANS EXTENDING FORWARDLY FROM EACH OF SAID UNITS INCLUDING AN INWARDLY EXTENDING PART, A DRAFT MEMBER PIVOTALLY CONNECTED TO EACH OF SAID UNITS AND EXTENDING FORWARDLY IN SLIDING RELATION TO THE RESPECTIVE OF SAID DRAWBAR MEANS FOR LATERAL SWINGING BETWEEN POSITIONS IN FORWARDLY CONVERGING RELATION FOR PIVOTAL CONNECTION TO THE TRACTOR FOR OPERATION OF THE IMPLEMENT AND POSITIONS SUBSTANTIALLY PARALLEL TO THE LINE OF TRAVEL OF SAID UNITS, MEANS FOR RELEASABLY LOCKING SAID DRAFT MEMBERS TO SAID DRAWBAR MEANS TO PREVENT SAID LATERAL
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) | 1971-06-11 | 1971-12-11 | 1972-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-11 | 1975-12-11 | 1976-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-11 | 1979-12-11 | 1980-06-11 | $7700.00 | Window Closed / Lapsed |