US4957520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the removal of vapors and vapor products
Assignee: France Grignotage SARL
•
Filing: 1989-04-19
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Granted: 1990-09-18
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Expires: 2009-04-19
Abstract
Abstract A device for removing (i.e., suction, capture and trapping) vapors and products carried by the vapors, for placement above a system for cooking food products in water or oil, circulates the exhaust gases in a cyclone having cooled walls to cause cold-wall condensation of the exhaust gases over the flow path through the cyclone.
Inventors
- 👤 Michel Parmentier
- 👤 Jean-Charles Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:14
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/20; B; B01; B01D; B01D50/00; B01D50/20; Y; Y10; Y10S; Y10S55/00; Y10S55/36
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
175 words
An apparatus requiring reduced maintenance and cleaning, for removing vapors and condensable and non-condensable products carried by said vapors for placement above a system for cooking food products in water or oil, and having a hood, a cyclone having upper and lower portions, means for recovering the condensable products and an absorption filter, said apparatus comprising: (a) a hood for receiving vapors and condensable and non-condensable products carried by said vapors and communicating with upper portions of the cyclone; (b) a cyclone under a partial vacuum relative to the hood for separating condensable products from non-condensable products wherein the condensable products condense against the cooled walls of the cyclone over the path of gases circulating through the cyclone thereby cleaning the walls on a continuous basis with streaming of condensed water, and wherein the non-condensable products are diverted to an absorption filter; (c) an absorption filter located at an outlet of the cyclone for trapping non-condensable products; and (d) recovering means in a lower portion of the cyclone for recovering condensable products including a syphon.
Claim 2
Independent Claim
175 words
An apparatus requiring reduced maintenance and cleaning, for removing vapors and condensable and non-condensable products carried by said vapors for placement above a system for cooking food products in water or oil, and having a hood, a cyclone having upper and lower portions, means for recovering the condensable products and an absorption filter, said apparatus comprising: (a) a hood for receiving vapors and condensable and non-condensable products carried by said vapors and communicating with upper portions of the cyclone; (b) a cyclone under a partial vacuum relative to the hood for separating condensable products from non-condensable products wherein the condensable products condense against the cooled walls of the cyclone over the path of gases circulating through the cyclone thereby cleaning the walls on a continuous basis with streaming of condensed water, and wherein the non-condensable products are diverted to an absorption filter; (c) an absorption filter located at an outlet of the cyclone for trapping non-condensable products; and (d) recovering means in a lower portion of the cyclone for recovering condensable products including a syphon.
Claim 3
Dependent Claim
30 words
The apparatus of claim 1 further comprising an extraction turbine positioned at an outlet of the cyclone and communicating with the cyclone for maintaining the cyclone under a partial vacuum.
Claim 4
Dependent Claim
16 words
The apparatus of claim 2 wherein the extraction turbine draws non-condensable products to the absorption filter.
Claim 5
Dependent Claim
13 words
The apparatus of claim 1 wherein the recovering means include a drainage tank.
Claim 6
Dependent Claim
17 words
The apparatus of claim 1 wherein the cyclone has externally located cooling means for the cyclone wall.
Claim 7
Dependent Claim
20 words
The apparatus of claim 1 wherein the cyclone has externally located cooling means disposed along upper portions of the cyclone.
Claim 8
Dependent Claim
22 words
The apparatus of claim 6 wherein said external cooling means have a refrigerating capacity developed by a refrigerant fluid under direct expansion.
Claim 9
Dependent Claim
19 words
The apparatus of claim 5 wherein said external cooling means have a refrigerating capacity developed by circulation of water.
Claim 10
Dependent Claim
12 words
The apparatus of claim 1 wherein the absorption filter is activated charcoal.
References Cited (Backward Citations)
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Cited
US4350504A
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US4460386A
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US4502871A
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US4643742A
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US4615715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-17 | 1994-03-19 | 1994-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-17 | 1998-03-19 | 1998-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-17 | 2002-03-19 | 2002-09-18 | $7700.00 | Window Closed / Lapsed |