US3217863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tensioning means for belt conveyors
Assignee: Mining Engineering Co Ltd MECO
•
Filing: 1964-10-07
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Granted: 1965-11-16
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Expires: 1984-10-07
Abstract
No abstract record available.
Inventors
- 👤 Duncan Angus Wellesley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:15
CPC Classifications
B; B65; B65G; B65G23/00; B65G23/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
POWER-OPERATED MEANS FOR MAINTAINING A SUBSTANTIALLY UNIFORM TENSION IN THE BELT OF A BELT CONVEYOR, COMPRISING A CARRIAGE MOVABLE IN THE DIRECTION OF THE LENGTH OF THE BELT, A DRUM WHICH IS ROTATABLY MOUNTED IN SAID CARRIAGE AND AROUND WHICH A LOOP OF THE BELT IS CARRIED, A ROPE WHICH, LOAD SENSITIVE MEANS, A ROPE COUPLED TO SAID CARRIAGE, ONE END OF SAID ROPE BEING WOUND ON SAID WINCH, MEANS CONNECTING THE ROPE TO SAID LOAD-SENSITIVE MEANS AND POWER MEANS FOR DRIVING SAID WINCH IN ONE DIRECTION OR THE OTHER UNDER THE CONTROL OF SAID LOAD-SENSITIVE MEANS ACCORDING TO WHETHER THE LOAD ON THE ROPE IS ABOVE OR BELOW A PREDETERMINED VALUE, AN ELECTRICAL CIRCUIT CONTROLLING THE OPERATION OF SAID POWER MEANS, SAID CIRCUIT
Claim 2
Dependent Claim
124 words
POWER-OPERATED MEANS FOR MAINTAINING A SUBSTANTIALLY UNIFORM TENSION IN THE BELT OF A BELT CONVEYOR, COMPRISING A CARRIAGE MOVABLE IN THE DIRECTION OF THE LENGTH OF THE BELT, A DRUM WHICH IS ROTATABLY MOUNTED IN SAID CARRIAGE AND AROUND WHICH A LOOP OF THE BELT IS CARRIED, A ROPE WHICH, LOAD SENSITIVE MEANS, A ROPE COUPLED TO SAID CARRIAGE, ONE END OF SAID ROPE BEING WOUND ON SAID WINCH, MEANS CONNECTING THE ROPE TO SAID LOAD-SENSITIVE MEANS AND POWER MEANS FOR DRIVING SAID WINCH IN ONE DIRECTION OR THE OTHER UNDER THE CONTROL OF SAID LOAD-SENSITIVE MEANS ACCORDING TO WHETHER THE LOAD ON THE ROPE IS ABOVE OR BELOW A PREDETERMINED VALUE, AN ELECTRICAL CIRCUIT CONTROLLING THE OPERATION OF SAID POWER MEANS, SAID CIRCUIT
References Cited (Backward Citations)
US2661832A
Cited
US2782902A
Cited
US2796167A
Cited
US2858933A
Cited
US2862604A
Cited
US2788116A
Cited
US2846054A
Cited
US2858935A
Cited
US3027993A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |