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US4500331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Kitchen exhaust apparatus
Assignee: Individual
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Filing: 1983-01-07
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Granted: 1985-02-19
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Expires: 2003-01-07
Abstract
Abstract A kitchen exhaust apparatus comprises a fan housing which includes a cylindrical portion and an extension which extends tangentially and contiguously from the cylindrical portion. A bottom wall extends across the cylindrical portion and the extension, which bottom wall defines an inlet port in the cylindrical portion. A portion of the bottom wall located in the extension is sloped upwardly in a direction away from the cylindrical portion. An outlet port is located above such sloped portion of the bottom wall. A motor driven centrifugal fan is arranged in the cylindrical portion above the inlet port to draw-in air and cause particles entrained in the air to travel into the extension and upwardly and downwardly along the sloped portion. Drain apertures are located in the bottom wall so as to lie along the path of travel of such particles to facilitate drainage thereof into a gathering tray mounted beneath the fan housing.
Inventors
- 👤 Chung-Tsung Cheng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:17
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/12; B01D45/14; F; F24; F24C; F24C15/00; F24C15/20; Y; Y10; Y10S; Y10S55/00; Y10S55/36
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
278 words
A kitchen exhaust apparatus comprising: a fan housing including: a cylindrical portion having a curved outer wall, an extension contiguous with said cylindrical portion and having first and second side walls which intersect said curved outer wall, said first side wall being oriented tangentially relative to said curved outer wall, a bottom wall extending across said cylindrical portion and said extension, said bottom wall having: a vertical inlet portion disposed in said cylindrical portion and being spaced radially inwardly from said curved outer wall, and an upwardly sloped portion disposed in said extension between said side walls and slopding upwardly away from said cylindrical portion, means forming an outlet port above said sloped portion, a first drain aperture disposed in said bottom wall within said extension and located between said side walls and adjacent a lower end of said upwardly sloping portion, and a second drain aperture disposed in said bottom wall between said inlet port and a point of intersection of said second side wall with said curved outer wall, a motor-driven centrifugal fan arranged in said cylindrical portion above said inlet port to draw-in air and discharge the air through said outlet port and to impart centrifugal force to oleaginous and liquid particles entrained in the air, whereupon such particles travel along a path extending along said first side wall and upwardly along said sloped portion and then downwardly along said sloped portion toward said second drain aperture, with some of the particles falling through said first and second drain apertures, and a gathering tray disposed beneath said fan housing and said first and second apertures to catch particles falling through said first and second apertures.
Claim 2
Dependent Claim
278 words
A kitchen exhaust apparatus comprising: a fan housing including: a cylindrical portion having a curved outer wall, an extension contiguous with said cylindrical portion and having first and second side walls which intersect said curved outer wall, said first side wall being oriented tangentially relative to said curved outer wall, a bottom wall extending across said cylindrical portion and said extension, said bottom wall having: a vertical inlet portion disposed in said cylindrical portion and being spaced radially inwardly from said curved outer wall, and an upwardly sloped portion disposed in said extension between said side walls and slopding upwardly away from said cylindrical portion, means forming an outlet port above said sloped portion, a first drain aperture disposed in said bottom wall within said extension and located between said side walls and adjacent a lower end of said upwardly sloping portion, and a second drain aperture disposed in said bottom wall between said inlet port and a point of intersection of said second side wall with said curved outer wall, a motor-driven centrifugal fan arranged in said cylindrical portion above said inlet port to draw-in air and discharge the air through said outlet port and to impart centrifugal force to oleaginous and liquid particles entrained in the air, whereupon such particles travel along a path extending along said first side wall and upwardly along said sloped portion and then downwardly along said sloped portion toward said second drain aperture, with some of the particles falling through said first and second drain apertures, and a gathering tray disposed beneath said fan housing and said first and second apertures to catch particles falling through said first and second apertures.
Claim 3
Dependent Claim
23 words
Apparatus according to claim 1, wherein said first aperture is located closer to said first side wall than to said second side wall.
Claim 4
Dependent Claim
23 words
Apparatus according to claim 1, wherein there are a plurality of said first apertures extending along said lower end of said sloped portion.
Claim 5
Dependent Claim
13 words
Apparatus according to claim 3, wherein said first apertures comprise elongate parallel slits.
Claim 6
Dependent Claim
19 words
Apparatus according to claim 4, wherein said slits are oriented parallel to said lower end of said sloped portion.
Claim 7
Dependent Claim
22 words
Apparatus according to claim 4, wherein said slits are oriented at an angle relative to said lower end of said sloped portion.
Claim 8
Dependent Claim
27 words
Apparatus according to claim 1 including a third aperture in said bottom wall located adjacent the intersection of said curved outer wall and said first side wall.
Claim 9
Dependent Claim
26 words
Apparatus according to claim 7, wherein said third aperture is disposed adjacent a rearmost part of said fan housing, said housing being inclined toward the rear.
Claim 10
Dependent Claim
22 words
Apparatus according to claim 1, including a drain tube connected to said gathering tray and a container connected to said drain tube.
Claim 11
Dependent Claim
17 words
Apparatus according to claim 1, wherein said bottom wall includes an upstanding rim surrounding said inlet port.
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) | 1988-02-19 | 1988-08-20 | 1989-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-19 | 1992-08-20 | 1993-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-19 | 1996-08-20 | 1997-02-19 | $7700.00 | Window Closed / Lapsed |