Patent US3200940A successfully refreshed from Google Patents.
US3200940A
Expired / Lapsed
US
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Belt conveyors
Assignee: Mining Engineering Co Ltd MECO
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Filing: 1964-02-04
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Granted: 1965-08-17
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Expires: 1984-02-04
Abstract
Abstract 982,815. Endless conveyers. MINING ENGINEERING CO. Ltd. Jan. 30, 1964 [Feb. 16, 1963], No. 6377/63. Heading B8A. To retard a loaded conveyer belt travelling downhill at a substantial angle, one or more trays 21 are mounted on stringers 11 which support self-troughing roller assemblies 10. Each tray consists of two oppositely inclined plates 22 welded to two bars 23 having U- shaped members 24 which embrace the stringers 11. When the belt is unloaded it is supported by the roller assemblies 10 just clear of the trays, but when the belt is loaded the troughing angle of the assemblies 10 increases and the underside of the belt comes into contact with the tray. Specification 872,266 is referred to.
Inventors
- 👤 Higgins Bernard Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:47
CPC Classifications
B; B65; B65G; B65G21/00; B65G21/02; B65G15/00; B65G15/08; B65G15/60; B65G15/62; B65G39/00; B65G39/10; B65G39/12; B65G39/14; B65G43/00; B65G43/08; B65G2201/00; B65G2201/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A BELT COVEYOR INCORPORATING A BELT, AND RESILIENTLY MOUNTED SELF-TROUGHING IDLER ROLLER ASSEMBLIES SUPPORTING THE BELT AND MOVABLE BETWEEN A FIRST LEVEL WHEN THE BELT IS UNLOADED AND OTHER LEVEL WHEN THE BELT IS LOADED, IN COMBINATION THEREWITH, AT LEAST ONE BELT SUPPORTING TRAY MOUNTED BETWEEN ADJACENT ROLLER ASSEMBLIES AT A LEVEL BELOW SAID FIRST LEVEL OF THE ROLLERS, AND IN A POSITION TO BE FRICTIONALLY ENGAGED BY THE UNDERSIDE OF SAID BELT WHEN THE LATTER IS LOADED WHEREBY SAD TRAY ACTS AS A FRICTION BRAKE.
Claim 2
Dependent Claim
86 words
A BELT COVEYOR INCORPORATING A BELT, AND RESILIENTLY MOUNTED SELF-TROUGHING IDLER ROLLER ASSEMBLIES SUPPORTING THE BELT AND MOVABLE BETWEEN A FIRST LEVEL WHEN THE BELT IS UNLOADED AND OTHER LEVEL WHEN THE BELT IS LOADED, IN COMBINATION THEREWITH, AT LEAST ONE BELT SUPPORTING TRAY MOUNTED BETWEEN ADJACENT ROLLER ASSEMBLIES AT A LEVEL BELOW SAID FIRST LEVEL OF THE ROLLERS, AND IN A POSITION TO BE FRICTIONALLY ENGAGED BY THE UNDERSIDE OF SAID BELT WHEN THE LATTER IS LOADED WHEREBY SAD TRAY ACTS AS A FRICTION BRAKE.
References Cited (Backward Citations)
US3047131A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |