US3191322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Earth scraper with pivoted conveyor
Assignee: Johnson Manufacturing Co
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Filing: 1963-02-08
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Granted: 1965-06-29
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Expires: 1983-02-08
Abstract
No abstract record available.
Inventors
- 👤 Charles M Johnson
- 👤 James E Lowder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:37
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/64; E02F3/65; E02F3/654; E02F3/655; E02F3/6454; E02F3/6481
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
A MOBILE EARTH-SCRAPING MACHINE COMPRISING: AN OPEN-FRONT CONTAINER HAVING BOTTOM, SIDE AND REAR WALLS; A SCRAPER BLADE CARRIED BY SAID CONTAINER AT THE FRONT OF SAID BOTTOM WALL AND AN ENDLESS SCRAPER-TYPE RIGID-FRAME ENDLESS CHAIN CONVEYOR EXTENDING UPWARDLY AND REARWARDLY IN THE FORWARD PART OF SAID CONTAINER; MEANS MOUNTING SAID CONVEYOR FOR MOVEMENT IN A VERTICAL PLANE TOWARD AND AWAY FROM THE BOTTOM WALL OF SAID CONTAINER, A CONVEYOR SUPPORT ARM ON EACH SIDE OF THE CONVEYOR, EACH ARM BEING PIVOTED AT ONE END TO THE UPPER PORTION OF SAID CONVEYOR FRAME AND AT ITS OTHER END TO A PIVOT POINT ON THE ADJACENT SIDE WALL FOR PIVOTAL MOVEMENT IN A VERTICAL PLANE; MEANS MOUNTING SAID PIVOT POINTS FOR MOVEMENT WITH RESPECT TO SAID SIDE WALLS WHEREBY THE REAR END OF SAID CONVEYOR IS FREE TO SWING UPWARDLY AND DOWNWARDLY RELATIVE TO SAID CONTAINER SO AS TO ASSURE THAT THE CONVEYOR CONTINUOUSLY ACTS ON SUBSTANITALLY THE ENTIRE FORWARD FACE OF THE PILE OF DIRT WHICH ACCUMULATES IN SAID CONTAINER DURING A SCRAPING OPERATION.
Claim 2
Dependent Claim
173 words
A MOBILE EARTH-SCRAPING MACHINE COMPRISING: AN OPEN-FRONT CONTAINER HAVING BOTTOM, SIDE AND REAR WALLS; A SCRAPER BLADE CARRIED BY SAID CONTAINER AT THE FRONT OF SAID BOTTOM WALL AND AN ENDLESS SCRAPER-TYPE RIGID-FRAME ENDLESS CHAIN CONVEYOR EXTENDING UPWARDLY AND REARWARDLY IN THE FORWARD PART OF SAID CONTAINER; MEANS MOUNTING SAID CONVEYOR FOR MOVEMENT IN A VERTICAL PLANE TOWARD AND AWAY FROM THE BOTTOM WALL OF SAID CONTAINER, A CONVEYOR SUPPORT ARM ON EACH SIDE OF THE CONVEYOR, EACH ARM BEING PIVOTED AT ONE END TO THE UPPER PORTION OF SAID CONVEYOR FRAME AND AT ITS OTHER END TO A PIVOT POINT ON THE ADJACENT SIDE WALL FOR PIVOTAL MOVEMENT IN A VERTICAL PLANE; MEANS MOUNTING SAID PIVOT POINTS FOR MOVEMENT WITH RESPECT TO SAID SIDE WALLS WHEREBY THE REAR END OF SAID CONVEYOR IS FREE TO SWING UPWARDLY AND DOWNWARDLY RELATIVE TO SAID CONTAINER SO AS TO ASSURE THAT THE CONVEYOR CONTINUOUSLY ACTS ON SUBSTANITALLY THE ENTIRE FORWARD FACE OF THE PILE OF DIRT WHICH ACCUMULATES IN SAID CONTAINER DURING A SCRAPING OPERATION.
References Cited (Backward Citations)
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Cited
US2301098A
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US2548754A
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US2679119A
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US2791041A
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US2984022A
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US2994139A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |