Patent US3615248A successfully refreshed from Google Patents.
US3615248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoke control system
Assignee: GEORGE J HOLLER JR
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Filing: 1970-01-12
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Granted: 1971-10-26
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Expires: 1990-01-12
Abstract
Abstract A smoke control system utilizing an afterburner and a filter formed from expanded blast furnace slag, the filter being in the form of a cartridge carried with other filter cartridges in a rotatable drum assembly whereby a clean filter can be rotated into position to permit products of combustion to pass therethrough while dirty filters are rotated to a position where they can be cleaned automatically for reuse.
Inventors
- 👤 George J Holler Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:34
CPC Classifications
F; F23; F23B; F23B5/00; F23B2700/00; F23B2700/022
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
30 words
The smoke control system of claim 1 wherein said afterburner has an exhaust opening of reduced size whereby a turbulent condition of the gases will be produced in said afterburner.
Claim 2
Dependent Claim
17 words
The combination of claim 1 wherein said heating means within the afterburner comprises an electrical heating coil.
Claim 3
Dependent Claim
134 words
In a smoke control system, the combination of an afterburner, means for directing smoke-laden air into said afterburner, heating means within said afterburner for burning combustible materials in said smoke-laden air, filter means connected to the output of said afterburner and through which gases from said afterburner pass, said filter means comprising a rotatable drum having a plurality of filters circumferentially spaced around the periphery thereof whereby upon rotation of the drum successive filters will be moved into registry with the outlet of said afterburner, a blower connected to the side of said filter means opposite said afterburner and including conduit means for conducting gases after passing through said blower through a second filter in said rotatable drum, and means for recirculating hot gases through said afterburner after they have passed through said filters.
Claim 4
Dependent Claim
25 words
The combination of claim 4 wherein said means for directing smoke-laden air into said afterburner comprises a plurality of hoods disposed within a smoke stack.
Claim 5
Dependent Claim
25 words
The combination of claim 5 including conduit means for returning the gases to said smoke stack after passing through said afterburner and said filter means.
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) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |