US3280919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual lift cylinder lock mechanism for tractors
Assignee: Massey Ferguson Inc
•
Filing: 1964-04-13
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Granted: 1966-10-25
•
Expires: 1984-04-13
Abstract
No abstract record available.
Inventors
- 👤 Ernest V Bunting
- 👤 Hans V Lind
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:18
CPC Classifications
A; A01; A01B; A01B63/00; A01B63/02; A01B63/10; A01B63/1006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
IN A TRACTOR HAVING A PAIR OF TRAILING PIVOTED DRAFT LINKS, A LINK LIFTING ASSEMBLY COMPRISING, IN COMBINATION, A PAIR OF LIFT MEANS PIVOTED ABOUT AN AXIS ON SAID TRACTOR ONE ABOVE EACH OF SAID DRAFT LINKS, A PAIR OF DROP LINKS RESPECTIVELY COUPLING SAID LIFT ARMS AND THE UNDERLYING DRAFT LINKS, A PAIR OF HYDRAULICALLY INTERCONNECTED ACTUATORS ANCHORED ON SAID TRACTOR AND RESPECTIVELY SECURED TO SAID LIFT ARMS FOR HYDRAULICALLY RAISING SAID DRAFT LINKS, A LOCK ARM PIVOTED ON SAID AXIS CLOSELY ADJACENT ON OF SAID LIFT ARMS AND BEING SECURED FOR ROTATION WITH THE
Claim 2
Dependent Claim
96 words
IN A TRACTOR HAVING A PAIR OF TRAILING PIVOTED DRAFT LINKS, A LINK LIFTING ASSEMBLY COMPRISING, IN COMBINATION, A PAIR OF LIFT MEANS PIVOTED ABOUT AN AXIS ON SAID TRACTOR ONE ABOVE EACH OF SAID DRAFT LINKS, A PAIR OF DROP LINKS RESPECTIVELY COUPLING SAID LIFT ARMS AND THE UNDERLYING DRAFT LINKS, A PAIR OF HYDRAULICALLY INTERCONNECTED ACTUATORS ANCHORED ON SAID TRACTOR AND RESPECTIVELY SECURED TO SAID LIFT ARMS FOR HYDRAULICALLY RAISING SAID DRAFT LINKS, A LOCK ARM PIVOTED ON SAID AXIS CLOSELY ADJACENT ON OF SAID LIFT ARMS AND BEING SECURED FOR ROTATION WITH THE
References Cited (Backward Citations)
GB667488A
Cited
US2880812A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |