Patent US3526899A successfully refreshed from Google Patents.
Patent US4309113A successfully refreshed from Google Patents.
US4309113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asphaltic concrete recycle exhaust gas treatment apparatus and method
Assignee: Individual
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Filing: 1980-03-24
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Granted: 1982-01-05
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Expires: 2000-03-24
Abstract
Abstract An improved process for cleaning asphaltic concrete recycle gases comprises introducing a flame into the exhaust gas stream at the opposite drum end that heating gases are introduced.
Inventors
- 👤 Robert L. Mendenhall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:58
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/02; E01C19/10; E01C19/1013; E01C19/1027; E01C19/1036; E01C2019/1081; E01C2019/1095
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
125 words
In a process for heating and mixing asphaltic concrete in an elongated rotatable drum having an input end and an opposite output end, supplying hot gases of combustion at said input end and directing said hot gases substantially along the length of said drum from said input end to said output end, wherein said composition is directed along said drum toward said output end while being exposed directly to said hot gases, and resulting in a stream of exhaust gases flowing out of said output end containing combustible hydrocarbon gases from the heated asphalt, the improvement comprising: burning said combustible hydrocarbon gases by directing flame into said drum adjacent said output end and into said stream of exhaust gases and toward said drum input end.
Claim 2
Dependent Claim
125 words
In a process for heating and mixing asphaltic concrete in an elongated rotatable drum having an input end and an opposite output end, supplying hot gases of combustion at said input end and directing said hot gases substantially along the length of said drum from said input end to said output end, wherein said composition is directed along said drum toward said output end while being exposed directly to said hot gases, and resulting in a stream of exhaust gases flowing out of said output end containing combustible hydrocarbon gases from the heated asphalt, the improvement comprising: burning said combustible hydrocarbon gases by directing flame into said drum adjacent said output end and into said stream of exhaust gases and toward said drum input end.
Claim 3
Dependent Claim
14 words
The process of claim 1 including directing oxygen containing gas into said exhaust gases.
Claim 4
Dependent Claim
23 words
The process of claim 2 wherein said oxygen containing gas is directed into said exhaust gases before the combustible hydrocarbon gases are burned.
Claim 5
Dependent Claim
78 words
In an apparatus for heating and mixing asphaltic concrete composition comprising an elongated rotatable drum having an input end and an opposite output end, means for supplying hot gases of combustion at said input end toward said output end, means for recovering heated composition at said output end, and a port at said output end for venting exhaust gases therefrom, the improvement comprising: burner means adjacent said port for directing flame into said drum toward said input end.
Claim 6
Dependent Claim
78 words
In an apparatus for heating and mixing asphaltic concrete composition comprising an elongated rotatable drum having an input end and an opposite output end, means for supplying hot gases of combustion at said input end toward said output end, means for recovering heated composition at said output end, and a port at said output end for venting exhaust gases therefrom, the improvement comprising: burner means adjacent said port for directing flame into said drum toward said input end.
Claim 7
Dependent Claim
21 words
The apparatus of claim 4 wherein said burner means comprises at least one burner having a nozzle extending through said port.
Claim 8
Dependent Claim
19 words
The apparatus of claim 4 including means for introducing oxygen containing gas into said drum upstream from said port.
References Cited (Backward Citations)
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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) | 1985-01-04 | 1985-07-06 | 1986-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-04 | 1989-07-06 | 1990-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-04 | 1993-07-06 | 1994-01-05 | $7700.00 | Window Closed / Lapsed |