Patent US3630502A successfully refreshed from Google Patents.
US3630502A
Expired / Lapsed
US
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Apparatus for the thermal treatment of solids
Assignee: Dravo Corp
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Filing: 1970-04-09
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Granted: 1971-12-28
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Expires: 1990-04-09
Abstract
Abstract Apparatus for the thermal treatment of solids in straighttraveling grates including a working path extending through a sintering machine where grate trucks are passed therethrough at one speed, and a conveying device for carrying the grate units back to the working path at a speed much greater than the work speed. An acceleration device is positioned at the end of the work path and is shaped to transfer a grate truck to the conveying device while at the same time accelerating the truck to the speed of the conveying device. A deceleration device positioned at the end of the conveying device transfers a grate truck to the work path while decelerating it to the work path speed.
Inventors
- 👤 Werner Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:46
CPC Classifications
F; F27; F27B; F27B21/00; F27B21/06; B; B01; B01J; B01J2/00; B01J2/26
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
143 words
Apparatus for use in the thermal treatment of solids comprising: a work path extending through a treatment zone; traveling grate units for carrying solids through the treatment zone; power means fOr driving the grate units at one speed along the work path; no-load track means for carrying empty units back to the work path at a speed greater than the work speed; first elongated revolvable transfer means arranged at the discharge end of the work path for engaging and transferring the grate units from the work path to the no-load track means and for accelerating the units to the no-load track speed; and second elongated revolvable transfer means arranged at the feed end of the work path for engaging and transferring the grate units from the no-load track means to the work path and for decelerating the units to the work path speed.
Claim 2
Dependent Claim
143 words
Apparatus for use in the thermal treatment of solids comprising: a work path extending through a treatment zone; traveling grate units for carrying solids through the treatment zone; power means fOr driving the grate units at one speed along the work path; no-load track means for carrying empty units back to the work path at a speed greater than the work speed; first elongated revolvable transfer means arranged at the discharge end of the work path for engaging and transferring the grate units from the work path to the no-load track means and for accelerating the units to the no-load track speed; and second elongated revolvable transfer means arranged at the feed end of the work path for engaging and transferring the grate units from the no-load track means to the work path and for decelerating the units to the work path speed.
Claim 3
Dependent Claim
73 words
Apparatus as set forth in claim 1 wherein said first transfer means includes a rotatable lever member arranged at the end portion of the work path and shaped to engage a grate unit to guide same onto the no-load track; and said second transfer means includes a rotatable lever member arranged at the beginning portion of the work path and shaped to engage a grate unit to guide same onto the work path.
Claim 4
Dependent Claim
72 words
Apparatus as set forth in claim 1 wherein said first transfer means includes a rotatable cam member arranged at the end portion of the work path and shaped to engage a grate unit to guide same onto the no-load track; and said second transfer means includes a cam member arranged at the beginning portion of the work path and shaped to engage a grate unit to guide same onto the work path.
Claim 5
Dependent Claim
18 words
Apparatus as set forth in claim 1 wherein said work path is arranged above said no-load track means.
Claim 6
Dependent Claim
18 words
Apparatus as set forth in claim 1 wherein said no-load track means is arranged above said work path.
Claim 7
Dependent Claim
32 words
Apparatus as set forth in claim 3 wherein the cam member of said second transfer means forms said power means by being shaped to drive the grate units along the work path.
References Cited (Backward Citations)
US3329419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |