Patent US3683625A successfully refreshed from Google Patents.
US3683625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smog reducer
Assignee: EDWARD J MCCRINK
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Filing: 1970-05-25
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Granted: 1972-08-15
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Expires: 1990-05-25
Abstract
Abstract A silicon carbide resistance electric heating element is incorporated in the exhaust system of an automobile. The heating of the exhaust gases in this element will, with the addition of extra air, convert carbon monoxide in the exhaust to carbon dioxide. In a preferred form of the invention, an exhaust analyzer is connected to the exhaust system downstream from the heating element and controls an air auxiliary inlet to admit the proper amount of air to eliminate carbon monoxide.
Inventors
- 👤 Edward J Mccrink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:44
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/14; F01N3/00; F01N3/08; F01N3/0892; F01N3/10; F01N3/24; F01N3/26; F01N2270/00; F01N2270/04; F01N3/38; Y; Y02; Y02A; Y02A50/00; Y02A50/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
34 words
Apparatus as set forth in claim 1 wherein the mixing means comprises internal baffle means in spiral configuration and made of an electric resistance heating element, and connected to said source of electric power.
Claim 2
Dependent Claim
17 words
Apparatus as set forth in claim 2 wherein the internal baffle means are integral with said conduit.
Claim 3
Dependent Claim
19 words
Apparatus as set forth in claim 2 wherein said baffle means are separate and are inserted in said conduit.
Claim 4
Dependent Claim
17 words
Apparatus as set forth in claim 1 and further including insulation on the exterior of said conduit.
Claim 5
Dependent Claim
33 words
Apparatus as set forth in claim 1 and further including means for adjusting the amount of air added to said exhaust gases in accordance with the composition of gases at the exhaust outlet.
Claim 6
Dependent Claim
33 words
Apparatus as set forth in claim 6 and further including means for analyzing the composition of gases at the exhaust outlet and for automatically controlling the amount of air added in accordance therewith.
Claim 7
Dependent Claim
60 words
Apparatus as set forth in claim 1 wherein the means for mixing the air and gases comprises a spiral baffle on the internal wall of said conduit and a plurality of transverse baffles spaced longitudinally of said conduit centrally thereof and across the conduit axis and precluding a straight-through flow path, thus enhancing mixing of said air and exhaust gases.
Claim 8
Dependent Claim
17 words
Apparatus as set forth in claim 2 wherein said conDuit and internal baffle means comprise silicon carbide.
References Cited (Backward Citations)
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US3261161A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |