US3215000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control mechanism for tractors
Assignee: Tractor Research Ltd
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Filing: 1963-02-14
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Granted: 1965-11-02
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Expires: 1983-02-14
Abstract
No abstract record available.
Inventors
- 👤 Senkowski Alexander
- 👤 Inns Frank Markham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:57
CPC Classifications
F; F16; F16H; F16H48/00; F16H48/20; F16H48/295; F16H48/06; F16H48/08; F16H48/24; F16H48/30; F16H2048/305; F16H48/38; F16H48/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
IN TRACTOR HAVING A DIFFERENTIAL GEAR COUPLING HALFSHAFTS WITH WHICH THE REAR WHEELS OF THE TRACTOR ARE RESPECTIVELY ROTATABLE, A LOCKING DEVICE SUPPORTED FOR MOVEMENT INTO AND OUT OF LOCKING ENGAGEMENT WITH THE DIFFERENTIAL GEAR, AND A ROCK SHAFT HAVING A LIFT ARM ROTATABLE THEREWITH AND CONNECTABLE TO AN IMPLEMENT TO BE DRAWN BY THE TRACTOR, MECHANISM FOR CONTROLLING OPERATION OF THE LOCKING DEVICE COMPRISING A CONTROL LEVER CONNECTED WITH THE LOCKING DEVICE TO EFFECT MOVEMENT THEREOF INTO AND OUT OF LOCKING ENGAGEMENT WITH THE DIFFERENTIAL GEAR, AND A COUPLING DEVICE WHICH COUPLES SAID CONTROL LEVER AND ROCK SHAFT AND IS OPERABLE BY THE ROCK SHAFT TO EFFECT OPERATION OF THE CONTROL LEVER AS A FUNCTION OF THE ROCKING MOVEMENTS OF THE ROCK SHAFT.
Claim 2
Dependent Claim
124 words
IN TRACTOR HAVING A DIFFERENTIAL GEAR COUPLING HALFSHAFTS WITH WHICH THE REAR WHEELS OF THE TRACTOR ARE RESPECTIVELY ROTATABLE, A LOCKING DEVICE SUPPORTED FOR MOVEMENT INTO AND OUT OF LOCKING ENGAGEMENT WITH THE DIFFERENTIAL GEAR, AND A ROCK SHAFT HAVING A LIFT ARM ROTATABLE THEREWITH AND CONNECTABLE TO AN IMPLEMENT TO BE DRAWN BY THE TRACTOR, MECHANISM FOR CONTROLLING OPERATION OF THE LOCKING DEVICE COMPRISING A CONTROL LEVER CONNECTED WITH THE LOCKING DEVICE TO EFFECT MOVEMENT THEREOF INTO AND OUT OF LOCKING ENGAGEMENT WITH THE DIFFERENTIAL GEAR, AND A COUPLING DEVICE WHICH COUPLES SAID CONTROL LEVER AND ROCK SHAFT AND IS OPERABLE BY THE ROCK SHAFT TO EFFECT OPERATION OF THE CONTROL LEVER AS A FUNCTION OF THE ROCKING MOVEMENTS OF THE ROCK SHAFT.
References Cited (Backward Citations)
US2830670A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |