US3712457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Long-distance belt conveyor and method of operating same
Assignee: Fried Krupp AG
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Filing: 1970-10-06
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Granted: 1973-01-23
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Expires: 1990-10-06
Abstract
Abstract A long-distance conveyor with supporting means spaced relatively far from each other in the longitudinal direction of the conveyor, in which the tension of the belt means of the conveyor is automatically varied in conformity with the loading condition of the belt means in such a way that the preload on the belt is increased in conformity with a decrease in the load carried by the belt.
Inventors
- 👤 H Pelzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:55
CPC Classifications
B; B65; B65G; B65G23/00; B65G23/44
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
120 words
A long-distance conveyor which comprises: supporting means spaced from each other in the longitudinal direction of the conveyor and including troughing idlers, endless belt means supported by said supporting means and movable over said troughing idlers, driving means drivingly connected to said belt means, tensioning means associated with said belt means for exerting a variable preload upon said belt means, and control means operatively connected to said tensioning means and operable in conformity with variations in the load being transported by said conveyor to control said tensioning conversely means in such a manner that the preload exerted by said tensioning means upon said belt means will be increased considerably in response to a decrease in the load and vice versa.
Claim 2
Dependent Claim
120 words
A long-distance conveyor which comprises: supporting means spaced from each other in the longitudinal direction of the conveyor and including troughing idlers, endless belt means supported by said supporting means and movable over said troughing idlers, driving means drivingly connected to said belt means, tensioning means associated with said belt means for exerting a variable preload upon said belt means, and control means operatively connected to said tensioning means and operable in conformity with variations in the load being transported by said conveyor to control said tensioning conversely means in such a manner that the preload exerted by said tensioning means upon said belt means will be increased considerably in response to a decrease in the load and vice versa.
Claim 3
Dependent Claim
48 words
A conveyor according to claim 1, which includes driving means drivingly connected to said belt means, said driving means including electric motor means, and regulating means responsive to the electrical energy power consumption of said motor means and operatively connected to said control means for actuating the same.
Claim 4
Dependent Claim
167 words
A long-distance conveyor which comprises: supporting means spaced from each other in the longitudinal direction of the conveyor and including troughing idlers, endless belt means supported by said supporting means and movable over said troughing idlers, driving means drivingly connected to said belt means, tensioning means associated with said belt means for exerting a preload upon said belt means, control means operatively connected to said tensioning means and operable in conformity with variations in the load being transported by said conveyor to control said tensioning means in such a manner that the preload exertEd by said tensioning means upon said belt means will be increased in response to a decrease in the load and vice versa, reversing drum means at the end portions of the conveyor for reversing the moving direction of the belt section passing thereover, bearing means respectively rotatably supporting said drum means, and means responsive to the load acting upon at least one of said bearing means and operatively connected to said control means.
Claim 5
Dependent Claim
167 words
A long-distance conveyor which comprises: supporting means spaced from each other in the longitudinal direction of the conveyor and including troughing idlers, endless belt means supported by said supporting means and movable over said troughing idlers, driving means drivingly connected to said belt means, tensioning means associated with said belt means for exerting a preload upon said belt means, control means operatively connected to said tensioning means and operable in conformity with variations in the load being transported by said conveyor to control said tensioning means in such a manner that the preload exertEd by said tensioning means upon said belt means will be increased in response to a decrease in the load and vice versa, reversing drum means at the end portions of the conveyor for reversing the moving direction of the belt section passing thereover, bearing means respectively rotatably supporting said drum means, and means responsive to the load acting upon at least one of said bearing means and operatively connected to said control means.
References Cited (Backward Citations)
US3027993A
Cited
US3217863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |