Patent US3305041A successfully refreshed from Google Patents.
US3305041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Four wheel steering system
Assignee: International Motors LLC
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Filing: 1965-07-01
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Granted: 1967-02-21
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Expires: 1985-07-01
Abstract
No abstract record available.
Inventors
- 👤 Harold J Schramm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:30
CPC Classifications
B; B62; B62D; B62D7/00; B62D7/06; B62D7/14; B62D7/142
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A STEERING SYSTEM FOR A TRACTOR EQUIPPED WITH A HYDRAULIC POWER SYSTEM AND HAVING FRONT AND REAR WHEEL ASSEMBLIES RESPECTIVELY INCLUDING A PAIR OF FRONT WHEELS AND A PAIR OF REAR WHEELS, SAID PAIRS OF WHEELS BEING SEPARATELY STEERABLE IN RELATION TO THE LONGITUDINAL AXIS OF THE TRACTOR, (A) FIRST AND SECOND HYDRAULIC POWER MEANS IN OPERATIVE COMMUNICATION WITH SAID HYDRAULIC POWER SYSTEM AND ARRANGED RESPECTIVELY TO ACTUATE SAID PAIRS OF WHEELS IN STEERING MOVEMENT THEREOF, (B) VALVE MEANS IN OPERATIVE COMMUNICATION WITH SAID HYDRAULIC POWER SYSTEM AND SAID FIRST HYDRAULIC POWER MEANS FOR ACTUATING THE SAME UNDER OPERATOR CONTROL, TO EFFECT DIRECTIONAL CHANGES IN THE PATH OF TRAVEL OF SAID PAIR OF FRONT WHEELS, (C) SENSING VALVE MEANS IN OPERATIVE COMMUNICATION WITH SAID HYDRAULIC POWER SYSTEM AND SAID SECOND HYDRAULIC POWER MEANS FOR ACTUATING THE SAME TO EFFECT DIRECTIONAL CHANGES IN THE PATH OF TRAVEL OF SAID PAIR OF REAR WHEELS.
Claim 2
Dependent Claim
152 words
A STEERING SYSTEM FOR A TRACTOR EQUIPPED WITH A HYDRAULIC POWER SYSTEM AND HAVING FRONT AND REAR WHEEL ASSEMBLIES RESPECTIVELY INCLUDING A PAIR OF FRONT WHEELS AND A PAIR OF REAR WHEELS, SAID PAIRS OF WHEELS BEING SEPARATELY STEERABLE IN RELATION TO THE LONGITUDINAL AXIS OF THE TRACTOR, (A) FIRST AND SECOND HYDRAULIC POWER MEANS IN OPERATIVE COMMUNICATION WITH SAID HYDRAULIC POWER SYSTEM AND ARRANGED RESPECTIVELY TO ACTUATE SAID PAIRS OF WHEELS IN STEERING MOVEMENT THEREOF, (B) VALVE MEANS IN OPERATIVE COMMUNICATION WITH SAID HYDRAULIC POWER SYSTEM AND SAID FIRST HYDRAULIC POWER MEANS FOR ACTUATING THE SAME UNDER OPERATOR CONTROL, TO EFFECT DIRECTIONAL CHANGES IN THE PATH OF TRAVEL OF SAID PAIR OF FRONT WHEELS, (C) SENSING VALVE MEANS IN OPERATIVE COMMUNICATION WITH SAID HYDRAULIC POWER SYSTEM AND SAID SECOND HYDRAULIC POWER MEANS FOR ACTUATING THE SAME TO EFFECT DIRECTIONAL CHANGES IN THE PATH OF TRAVEL OF SAID PAIR OF REAR WHEELS.
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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |