US3845941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing asphalt-aggregate compositions
Assignee: Individual
•
Filing: 1973-05-15
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Granted: 1974-11-05
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Expires: 1993-05-15
Abstract
Abstract Asphalt-aggregate compositions are prepared in an elongated cylindrical drum having a plurality of hollow heated and spaced pipes extending therealong. Aggregate and asphalt are introduced into the drum at one end, the drum is rotated thereby mixing and heating the components and the finished composition is withdrawn at the other drum end. The apparatus includes a heating chamber at one end of the drum which communicates with the hollow pipe interiors and includes means for venting at least a portion of unburned hydrocarbon volatiles, smoke and gaseous mixtures from the heated composition into the heating chamber for further combustion while steam or water vapor are vented from the other end of the interior drum chamber.
Inventors
- 👤 Robert Lamar Mendenhall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:17
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/02; E01C19/10; E01C19/1013; E01C19/1027; E01C19/1036; F; F28; F28D; F28D11/00; F28D11/02; F28D11/04; E01C2019/1081; E01C2019/109
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
128 words
Apparatus for producing asphalt-aggregate compositions comprising: an elongated rotatable cylindrical drum having a cavity therein and a wall at each end thereof; a plurality of spaced hollow pipes extending along the interior of the cavity between the walls, the interior of the tubes communicating exteriorily of said walls; means for introducing asphalt and aggregate through one of the walls at an input end of the drum and means for removing composition through the wall at the opposite end; means for venting moisture from the drum cavity; a heating chamber at the opposite drum end communicating with the pipe interiors and burner means for supplying heat within the chamber; and means for venting at least a portion of gaseous mixtures from within the drum cavity to the heating chamber.
Claim 2
Dependent Claim
128 words
Apparatus for producing asphalt-aggregate compositions comprising: an elongated rotatable cylindrical drum having a cavity therein and a wall at each end thereof; a plurality of spaced hollow pipes extending along the interior of the cavity between the walls, the interior of the tubes communicating exteriorily of said walls; means for introducing asphalt and aggregate through one of the walls at an input end of the drum and means for removing composition through the wall at the opposite end; means for venting moisture from the drum cavity; a heating chamber at the opposite drum end communicating with the pipe interiors and burner means for supplying heat within the chamber; and means for venting at least a portion of gaseous mixtures from within the drum cavity to the heating chamber.
Claim 3
Dependent Claim
27 words
Apparatus of claim 1 wherein the composition Removing means comprises a chute member extending from the wall, through the heating chamber and terminating at an exterior port.
Claim 4
Dependent Claim
25 words
Apparatus of claim 2 wherein said gas mixture venting means comprises a duct assembly communicating with and between the chute member and the heating chamber.
Claim 5
Dependent Claim
18 words
Apparatus of claim 3 wherein said heating chamber includes one or more ports for introducing atmospheric air therein.
Claim 6
Dependent Claim
56 words
Apparatus of claim 4 including an exhaust assembly comprising an exhaust chamber cover at the input end of said drum defining an exhaust chamber communicating with the hollow pipes, and means for drawing heated gases from said heating chamber through said pipes, into said exhaust chamber and means for venting said gas from said exhaust chamber.
Claim 7
Dependent Claim
29 words
Apparatus of claim 5 wherein said heating chamber is defined between a drum wall at the drum end and a heating chamber cover which cover includes said duct assembly.
Claim 8
Dependent Claim
18 words
Apparatus of claim 6 wherein said heating chamber and exhaust chamber covers are independent of said rotatable drum.
Claim 9
Dependent Claim
21 words
Apparatus of claim 3 wherein said moisture venting means is provided through said wall at the input end of the cavity.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |