Gas separation – Combined or convertible
Reexamination Certificate
1999-04-29
2001-04-10
Simmons, David A. (Department: 1724)
Gas separation
Combined or convertible
C055S471000, C055S472000, C055S481000, C055SDIG001, C055SDIG003
Reexamination Certificate
active
06214073
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a smoke exhauster, and more particularly to a smoke exhauster having a fan casing that may be detached from the smoke exhauster for cleaning purposes.
2. Description of the Prior Art
Typical smoke exhausters comprise one or more fan devices secured in a fan casing that is secured in a housing. The fan casing and the fan devices are typically and solidly secured in the housing and may not be disengaged from the housing such that the fan casing and the fan devices may not be easily cleaned when required. A great amount of oil or grease will be accumulated within the fan casing and will not be easily cleaned if the fan casing and the fan devices may not be disengaged from the housing.
The present invention has arisen to mitigate and/or obviate the afore-described disadvantages of the conventional smoke exhausters.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a smoke exhauster having a fan casing that may be detached from the smoke exhauster for cleaning purposes.
In accordance with one aspect of the invention, there is provided a smoke exhauster comprising a housing including a top panel, a plate, a plurality of fasteners detachably securing the plate to the top panel of the housing, at least one fan device secured to the plate, and a fan casing secured to the plate for enclosing the fan device. The plate and the fan casing may be disengaged from the housing for allowing the fan devices and the fan casing to be easily cleaned.
The top panel of the housing includes two sides each having a downward flange dependent downward therefrom and each having a lateral flange extended from the downward flange thereof, the plate includes two side edges engaged with the lateral flange of the top panel of the housing, the fasteners are engaged through the side edges of the plate and the lateral flange of the top panel of the housing for securing the side edges of the plate and the lateral flange of the top panel of the housing together.
The housing includes two side walls each having an upper flange extended inward of the housing and each having a downward flange dependent downward from the upper flange of the side wall and secured to the downward flange of the top panel. The top panel of the housing includes an opening formed therein, the plate includes a conduit extended upward therefrom and engaged through the opening of the top panel.
An air passage is formed between the top panel of the housing and the plate for receiving air, the housing includes an upper front portion having a channel formed therein, the smoke exhauster further includes a filter device engaged in the channel of the housing and engaged in the air passage for filtering purposes. The upper front portion of the housing includes a plurality of apertures formed therein and communicating with the air passage for allowing the air to flow out of the housing. The filter device is an active carbon filter device for filtering the exhausted gas drawn through the air passage.
REFERENCES:
patent: 4790863 (1988-12-01), Nobirari et al.
patent: 5080699 (1992-01-01), Ho et al.
patent: 5094676 (1992-03-01), Karbacher
patent: 5443625 (1995-08-01), Schaffhausen
Chiang Chao Cheng
Chiang Chi Shyong
Pham Minh-Chau T.
Simmons David A.
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