Stoves and furnaces – Stove hoods
Reexamination Certificate
2000-01-18
2001-06-05
Price, Carl D. (Department: 3743)
Stoves and furnaces
Stove hoods
C126S29900R, C055SDIG003
Reexamination Certificate
active
06240916
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a wind box with an oil guide device for a smoke exhauster, particularly to one having good function to guide and collect oil, not letting oil to leak out or spread onto a housing of a smoke exhauster.
As shown in
FIG. 1
, a conventional smoke exhauster
10
has a housing
11
and a wind box
12
welded inside the housing
11
. The wind box
12
has two separated chambers
121
for containing an air exhausting system
13
, and a smoke passageway
122
formed to communicate with an outside of the housing
11
for smoke to flow out. Further a cover
14
closes the open front side of the housing
11
, and each chamber
121
has an air sucking hole
141
. When the wind box
12
is combined with the housing
11
, as shown in
FIGS. 2 and 3
, it is fixed on an inner surface
111
a
of the back plate
111
of the housing
11
, and the wind box
12
already has a welded rim
123
. Then several points of the welded rim
123
are welded with the inner surface
111
a,
with the welded points P securing the wind box with the housing
11
. So there are gaps S between the wind box
12
and the housing
11
except the welded points P. Further an oil exhausting tube
124
is provided to extend down from the bottom of the wind box
12
and connected to the two chambers
121
, having a plastic tube
125
fitting with an upper end thereof and extend into an oil collect cup
15
so as to guide accumulated oil in the chambers
121
flow down in the oil collect cup
15
.
Though the conventional smoke exhauster just described has function of drawing and exhausting smoke, oil L remained everywhere on it is not guided to flow out and very difficult to remove the remained oil L thereon. The reason is that the wind box
12
is not completely sealed up with the inner side
111
a of the back plate
111
, but only secured by some welded points, in spite of the oil exhaust tube
124
and the plastic tube
125
guiding oil L to flow in the oil collect cup
15
. So there are many gaps S between the wind box
12
and the inner surface
111
a
of the back plate
111
for oil mixed in smoke to spread everywhere in the smoke exhauster and cannot completely guided out by the oil exhaust tube
124
. Therefore, everywhere on the inner side of the housing
11
can be seen oil L adhered after the smoke exhauster is used for a period of time. In addition, smoke mixed with oil is drawn and exhausted out by the air exhausting system
13
, which is really the main source of remained oil L, as the air exhausting system
13
operates, the fan
131
produces centrifugal force and wind to force oil circulating around its periphery and then out of the gaps S. Then oil may flow everywhere inside the housing
11
, resulting in oil also escaping out of any gaps between plates of the housing
11
to adhere on the outside of the housing
11
.
SUMMARY OF THE INVENTION
This invention has been devised to offer a wind box with an oil guiding device for a smoke exhauster, which includes an oil guide plate and a wind box body. The oil guide plate is assembled with a housing of the smoke exhauster, having oil stop low walls formed at its peripheral edges for remaining oil only guided to flow down within an oil guide area defined by the oil stop low walls, not spreading onto the housing.
The main feature of the invention is the oil guide plate fixed in the housing of a smoke exhauster. The oil guide plate has oil stop low walls formed along its peripheral edges and the lowest point of the oil low walls has an oil outlet passing through a hole in the bottom of the housing for remaining oil to flow down through into an oil collect cup, preventing remaining oil from spreading onto the housing.
REFERENCES:
patent: 5230327 (1993-07-01), Jang et al.
patent: 5537988 (1996-07-01), Lin
patent: 5979436 (1999-11-01), Chiang et al.
patent: 2081823 (1992-11-01), None
patent: 2133835 (1984-08-01), None
Dougherty & Troxell
Price Carl D.
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