US3785778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoke eliminating device
Assignee: SMOKONTROL CORP
•
Filing: 1971-03-23
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Granted: 1974-01-15
•
Expires: 1991-03-23
Abstract
Abstract For eliminating combustible, carbon containing vapors or smoke, there is provided a device having an inlet hood capable of collecting smoke from a broiler or other cooker. The device has an outlet and a passageway between the hood and the outlet. In this passageway is a cellular, catalyst-coated refractory block threaded with high resistance electrical wire for heating the block cells. An impeller associated with the passageway draws the vapors through the heated block cells for combustion of the vapors and then forces them on through the outlet.
Inventors
- 👤 N Burstein
- 👤 R Ditzler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:11
CPC Classifications
F; F23; F23G; F23G7/00; F23G7/06; F23G7/07; B; B01; B01D; B01D53/00; B01D53/34; F24; F24C; F24C15/00; F24C15/20; F24C15/2042; F24C15/205; Y; Y10; Y10S; Y10S55/00; Y10S55/36
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
30 words
A smoke eliminating device according to claim 1 characterized in that said passageway has at least one additional inlet opening in communication with the atmosphere in advance of said impeller.
Claim 2
Dependent Claim
32 words
A smoke eliminating device according to claim 1 characterized in that said heat exchanger and chamber further includes a member of refractory material having said cellular passages coated with said oxidation catalyst.
Claim 3
Dependent Claim
70 words
A smoke eliminating device according to claim 3 characterized in that said member comprises at least three adjacent blocks arranged in sandwich fashion and each having catalyst coated cellular passagew that are interconnected in awry flow paths so that flowing air tends to impinge on the walls of said passages, said heating elements comprising high resistance electrical wire threaded through cellular passages of only the outer blocks of said member.
Claim 4
Dependent Claim
57 words
A smoke eliminating device according to claim 4 wherein said electrical wire is threaded continuously through said passages of said end blocks first in one direction through a given passage, then across the end of said given passage to a second passage displaced from said given passage, and then in the opposite direction through said second passage.
Claim 5
Dependent Claim
25 words
A smoke eliminating device according to claim 1 wherein said passageway has a cross-sectional flow area that is substantially less than that of said inlet.
Claim 6
Dependent Claim
118 words
A smoke eliminating device comprising: a hollow casing containing therein an inlet for receiving contaminated air and an outlet; a heat exchanger and catalytic chamber in said hollow casing between said inlet and outlet and providing an air path therebetween; said heat exchanger and catalytic chamber including a block having elongated passages extending through the block with the walls thereof covered with a catalytic material, and an electric heater means in a plurality of said passages for heating said block whereby air is heated and air contaminants are oxidized as the air passes through said passages and impinges against the walls thereof, said electric heater means including a high resistance wire threaded through a plurality of said pasSages.
Claim 7
Dependent Claim
32 words
A smoke eliminating device according to claim 7 and further comprising an air impelling device in said casing for drawing air into said inlet and through said heat exchanger and catalytic chamber.
Claim 8
Dependent Claim
19 words
A smoke eliminating device according to claim 7 wherein said block is formed of refractory material having through passages.
Claim 9
Dependent Claim
64 words
A smoke eliminating device according to claim 7 wherein said heat exchanger and catalytic chamber include at least one additional block having elongated passages with the walls thereof covered with catalytic material and means for retaining said blocks as a unit, whereby said heat exchanger and catalytic chamber can be assembled as a unit and readily removed as a unit for servicing or replacement.
Claim 10
Dependent Claim
16 words
A device as recited in claim 7 wherein said passages are generally parallel to each other.
Claim 11
Dependent Claim
24 words
A device as recited in claim 7 wherein said electrical resistance wire for a plurality of said passages are connected in series circuit relation.
Claim 12
Dependent Claim
24 words
A device as recited in claim 7 wherein said electrical resistance wire for a plurality of said passages is connected in parallel circuit relation.
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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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |