US3837269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Effluent ventilation and cleaning apparatus
Assignee: Elsters Inc
•
Filing: 1972-11-22
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Granted: 1974-09-24
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Expires: 1992-11-22
Abstract
Abstract An apparatus for ventilating kitchen exhaust fumes and treating the effluent from kitchens to remove air polluting constituents from the effluent. The apparatus includes a housing through which the exhaust is pulled by a fan at the outlet side of the housing. The housing has an inertial impingement degreaser section with means for collecting and disposing of grease and other aerosols extracted from the fumes. The exhaust then passes through an electrostatic precipitator section which removes remaining contaminants after which the treated exhaust is exhausted to the atmosphere or partially recirculated through the kitchen cooking area. If required, a device for odor removal by absorption, adsorption or ozone treatment is added in a plenum after the fan.
Inventors
- 👤 A Sweet
- 👤 A Kaufman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:30
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/04; B01D45/08; B01D50/00; B03; B03C; B03C3/00; B03C3/34; B03C3/36; F; F24; F24C; F24C15/00; F24C15/20; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y02A50/2351; Y10; Y10S; Y10S55/00; Y10S55/36
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
227 words
An apparatus for ventilating and cleaning kitchen exhaust fumes having aerosol greases and contaminants exhausted from a cooking surface comprising: a housing; an air inlet to the housing connected to the exhaust from an air hood over the cooking surface; an air outlet from said housing; an exhaust fan at said outlet to pull air through the apparatus; a grease extraction section in the housing inwardly of the exhaust air inlet, said grease extraction section including a series of baffle plates which define a plurality of air flow paths through which the exhaust air must pass, said baffle plates being so constructed and arranged as to provide a plurality of transverse surfaces in said air flow paths upon which air borne contaminants are impinged and collected, said baffle plates defining air flow paths having at least first and second air flow path segments, said first air flow path segment being substantially unidirectional and said second air flow path segment being substantially multidirectional, said transverse surfaces defining a progressive stepwise reduction in air flow cross sectional area along said first air flow path segment to thereby throttle the exhaust fumes passing through said grease extraction unit, said multidirectional flow consisting of a steplike path of substantially constant cross sectional area between opposing baffle plates, said second flow path opening to the exhaust outlet side of said baffle plates.
Claim 2
Independent Claim
227 words
An apparatus for ventilating and cleaning kitchen exhaust fumes having aerosol greases and contaminants exhausted from a cooking surface comprising: a housing; an air inlet to the housing connected to the exhaust from an air hood over the cooking surface; an air outlet from said housing; an exhaust fan at said outlet to pull air through the apparatus; a grease extraction section in the housing inwardly of the exhaust air inlet, said grease extraction section including a series of baffle plates which define a plurality of air flow paths through which the exhaust air must pass, said baffle plates being so constructed and arranged as to provide a plurality of transverse surfaces in said air flow paths upon which air borne contaminants are impinged and collected, said baffle plates defining air flow paths having at least first and second air flow path segments, said first air flow path segment being substantially unidirectional and said second air flow path segment being substantially multidirectional, said transverse surfaces defining a progressive stepwise reduction in air flow cross sectional area along said first air flow path segment to thereby throttle the exhaust fumes passing through said grease extraction unit, said multidirectional flow consisting of a steplike path of substantially constant cross sectional area between opposing baffle plates, said second flow path opening to the exhaust outlet side of said baffle plates.
Claim 3
Dependent Claim
25 words
The apparatus as defined in claim 1 which also includes an electrostatic precipitation unit positioned to receive the air passed from the grease extraction unit.
Claim 4
Dependent Claim
23 words
The apparatus as defined in claim 2 Which also includes automatic cleaning means for removing the collected grease from the grease extraction unit.
References Cited (Backward Citations)
US2583390A
Cited
US3260189A
Cited
US3433146A
Cited
US3457850A
Cited
US3566585A
Cited
US3664255A
Cited
US3602132A
Cited
US3629656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |