Patent US3237177A successfully refreshed from Google Patents.
US3237177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trailer tracking apparatus
Assignee: Individual
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Filing: 1962-06-22
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Granted: 1966-02-22
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Expires: 1982-06-22
Abstract
No abstract record available.
Inventors
- 👤 Donald G Sparks
- 👤 Leslie G Procasky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:38
CPC Classifications
B; B62; B62D; B62D53/00; B62D53/04; B62D53/08; B62D53/0871
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
APPARATUS FOR INDICATING ANGULAR MOVEMENT OF A TRAILER RELATIVE TO A TRACTOR TOWING THE TRAILER, SAID TRAILER HAVING A PIVOTAL CONNECTION TO THE TRACTOR, COMPRISING A HOUSING MOUNTED ON THE TRACTOR ADJACENT SAID PIVOTAL CONNECTION AND OFFSET FROM SAID PIVOTAL CONNECTION, A SHAFT JOURNALLED FOR ROTATION IN THE HOUSING ON AN AXIS OFFSET FROM AND GENERALLY TO THE AXIS OF SAID PIVOTAL CONNECTION, ONE END OF SAID SHAFT EXTENDING OUT OF THE HOUSING, AN EXTENSIBLE ARM ATTACHED AT ONE END THEREOF TO SAID ONE END OF SAID SHAFT, SAID ARM EXTENDING REARWARD FROM SAID HOUSNG AND HAVING ITS OTHER END CONNECTED TO THE TRAILER BY MEANS OF A DETACHABLE COUPLING, A VARIABLE RESISTANCE POTENTIOMETER IN SAID HOUSING OPERABLE BY SAID SHAFT, THE RESISTANCE OF SAID POTENTIOMETER VARYING AS A RESULT OF ROTATION OF THE SHAFT BY SAID ARM UPON PIVOTING OF THE TRAILER RELATIVE TO THE TRACTOR ABOUT SAID PIVOTAL CONNECTION, A METER IN THE TRACTOR AND AN ELECTRICAL CIRCUIT INTERCONNECTING THE POTENTIOMETER AND THE METER, SAID METER INDICATING TO THE DRIVER OF THE TRACTOR THE PIVOTAL MOVEMENT OF THE TRAILER.
Claim 2
Dependent Claim
181 words
APPARATUS FOR INDICATING ANGULAR MOVEMENT OF A TRAILER RELATIVE TO A TRACTOR TOWING THE TRAILER, SAID TRAILER HAVING A PIVOTAL CONNECTION TO THE TRACTOR, COMPRISING A HOUSING MOUNTED ON THE TRACTOR ADJACENT SAID PIVOTAL CONNECTION AND OFFSET FROM SAID PIVOTAL CONNECTION, A SHAFT JOURNALLED FOR ROTATION IN THE HOUSING ON AN AXIS OFFSET FROM AND GENERALLY TO THE AXIS OF SAID PIVOTAL CONNECTION, ONE END OF SAID SHAFT EXTENDING OUT OF THE HOUSING, AN EXTENSIBLE ARM ATTACHED AT ONE END THEREOF TO SAID ONE END OF SAID SHAFT, SAID ARM EXTENDING REARWARD FROM SAID HOUSNG AND HAVING ITS OTHER END CONNECTED TO THE TRAILER BY MEANS OF A DETACHABLE COUPLING, A VARIABLE RESISTANCE POTENTIOMETER IN SAID HOUSING OPERABLE BY SAID SHAFT, THE RESISTANCE OF SAID POTENTIOMETER VARYING AS A RESULT OF ROTATION OF THE SHAFT BY SAID ARM UPON PIVOTING OF THE TRAILER RELATIVE TO THE TRACTOR ABOUT SAID PIVOTAL CONNECTION, A METER IN THE TRACTOR AND AN ELECTRICAL CIRCUIT INTERCONNECTING THE POTENTIOMETER AND THE METER, SAID METER INDICATING TO THE DRIVER OF THE TRACTOR THE PIVOTAL MOVEMENT OF THE TRAILER.
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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |