Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
CA 2 i i 75 77
_
Title.EXTERNAL BODY OF A KITCHEN FUME EXTRACTOR
BACKGROUND OF THE INVENTION
The present invention re1ates generally to a kitchen smoke
or fume extractor or hood, and more particularly relates to an
external body for such an extractor.
Figs. 1-3 of the accompanying drawings illustrate the
external body of a conventional kitchen fume extractor. The
body 10 comprises a top sheet 11, a left sheet 12, a right
sheet 13 and a rear sheet 14. Both the left and right sheets
12, 13 are provided with projecting flanges 121, 131 around
their edges. In the process of assembling the various sheets
to form the body 10, both the left and right sheets 12, 13 are
united with the top sheet 11 by fitting the projecting flanges
121, 131 over the left and right edges 111, 112 of the top
sheet ll. The left and right sheets 12, 13 are fastened
securely to the top sheet 11 by spot welding.
The body of such a kitchen extractor suffers from the
following disadvantages, that is, because the sheets 11, 12,
13 and 14 are made of thin stainless steel sheet by means of
punching and pressing, both the external edges 122, 132 of the
projecting flanges 121, 131 of the left and right sheets 12, 13
are very sharp, rather like a blade, which is often a potential
hazard. Hence, when a person is transporting or cleaning the
body 10, his hand may be injured by the edges 122, 133.
CA 2 i i 7577
SUMMARY OF THE INVENTION
An object of the present invention is to provide an
external body for a kitchen fume extractor having an improved
structure effectively devoid of the previously mentioned sharp
edges, which are capable of inflicting an injury on persons
assembling, transporting or cleaning the extractor.
According to the present invention, an external body of a
kitchen fume extractor comprising a top sheet member having
left and right edges extending downwardly to form a short plate
portion and then extending inwardly to form a first fixing
portion, two side sheet members individually having a second
fixing portion extending inwardly from the upper edge
of the side sheet member and secured to the first fixing
portion, and a rear sheet member attached to the top sheet
member and the side sheet members.
The present invention may best be understood through the
following description with reference to the accompanying
drawings, in which:
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is an exploded schematic view of the external body
of a conventional extractor;
Fig. 2 is a perspecting view showing the body of Fig. 1
after assembly;
Fig. 3 is an enlarged fragmentary sectional view taken
- CA21 17577
along the line 3-3 in Fig. 2;
Fig. 4 is a perspective view showing an assembled body of
the persent invention;
Fig. 5 is a sectional view taken along the line 5-5 of
fig. 8, showing a first preferred embodiment according to the
present invention;
Fig. 6 is a schematic view of the structural features of a
second embodiment of the present invention;
Fig. 7 is a schematic view of the structural features of
a third embodiment of the present invention;
Fig. 8 is a schematic view of the structural features of a
fourth embo'diment of the present invention;
Fig. 9 is a schematic view of the structural features of a
fifth embodiment of the present invention;
Fig. 10 is a schematic view of the structural features of a
sixth embodiment of the present invention;
Fig. 11 is a schematic veiw of the structural features of a
seventh embodiment of the present invention;
Fig. 12 is a schematic view of the structural features of
an eighth embodiment of the present invention;
Fig. 13 is a schematic view of the structural features of
a ninth embodiment of the present invention;
Fig. 14 is a schematic view of the structural features of
a tenth embodiment of the present invention; and
Fig. 15 is a schematic view of the structural features of
- 3 -
CA21 1 7577
a eleventh embodiment of the present invention.
DETAICED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring now to fig. 4, an external body of a kitchen
fume extractor according to the present invention includes atop sheet member 20, two side sheet member 30 and a rear sheet
member 40.
Fig. 5 shows a first embodiment of the present invention,
in which the top sheet member having left and right edges
extending downwardly to form a short plate portion 21. The
bottom edge of the short plate portion extending inwardly to
form a first fixing portion 22. The side sheet member 30
having a second fixing portion 31 extending inwardly from it's
upper edge. Thereafter, the first and second fixing portion
22, 31 are securely fastened by means of spot welding, screws,
rivets, or the like.
The external body of a kitchen fume extractor embodying
the present invention has the following advantage over the
prior art, that is, the edges of the top sheet and side sheets
are united in such a unique manner that there are effectively
no exposed edges which may cause accidental injury to an
assembly worker or a person cleaning the body.
A second embodiment of the present invention is shown in
Fig. 6, in which the outter edge of the second fixing portion
31 extending upwardly to form a resisting portion 32. In the
CA21 1 7577
-
process of assembling the external body of this embodiment, the
first fixing portion 22 is kept close to the second fixing
portion 31, and is positioned on the resisting portion 32.
Thereafter, the first and second fixing portion 22, 31 are
securely fastened together.
As shown in Fig. 7, the third embodiment of the present
invention differs from the first embodiment in that the outter
edge of the first fixing portion 22 extending downwardly to
form a resisting portion 23, which resists the outter edge of
the second fixing portion 31.
A fourth preferred embodiment of the invention as show in
Fig. 8, is similar to the second preferred embodiment. The
distinction is that the upper edge of the resisting portion 32
is additionally bent outwardly to form a strip portion 33. So
as to form a receiving channel among the second fixing portion
31, the resisting portion 32 and the strip portion 33. The
first fixing portion 22 is closely integrated with the
associated receiving channels of the side sheet members 30.
A fifth preferred embodiment of the present invention as
show in Fig. 9, is similar to the third preferred embodiment.
The difference is that the bottom edge of the resisting portion
23 is additionally bent outwardly to form a strip portion 24.
So as to form a receiving channel among the first fixing portion
22, the resisting portion 23 and the strip portion 24. The
second fixing portion 31 is closely integrated with the
-- 5 --
ca2i 1 7577
associated receiving channels of the side sheet members 30.
As shown in Fig. 10, the sixth preferred embodiment of the
present invention differs from the fourth embodiment in that
the width of the strip portion 33 is longer than the fourth
embodiment. The ending edge of the strip portion 33 is very
near the internal surface of the short plate portion 21.
Thereafter, the first fixing portion 22, the second fixing
portion 31 and the strip portion 33 are held machanically
locked together by means of a pressing or forming device.
As shown in Fig. 11, the seventh preferred embodiment of
the present invention differs from the fifth embodiment in that
the width of the strip portion 24 is longer than the fifth
embodiment. The ending edge of the strip portion is very near
the internal surface of the side sheet members 30. Thereafter,
the second fixing portion 31, the first fixing portion 22 and
the strip portion 24 are held machanically locked together by
means of a pressing or forming device.
Fig. 12 shows an eighth embodiment of the present
invention differing from the sixth embodiment shown in Fig. 10
in that the width of the receiving channel is more wide than
the sixth embodiment. The ending edge of the strip portion 33
is bent downwardly and then inwardly through 180 degrees so as
to form a first basic strip 34. The ending edge of the first
fixing portion 22 is bent upwardly and then outwardly through
180 degrees so as to form a second basic strip 25. The first
CA21 1 7577
fixing portion 22 is then inserted into the receiving channel
of the side sheet members 30, and the top sheet member 20 and
the side sheet members 30 are held mechanically locked together
in an unique manner. That is, the ending edge of the second
basic strip 25 engages the ending edge of the first baic strip
34. Thus, this embodiment needs no welding.
Fig. 13 shows a ninth embodiment of the present invention
differing from the seventh embodiment shown in Fig. 11 in that
the width of the receiving channel is more wide than the
seventh embodiment. The ending edge of the strip portion 24 is
bent upwardly and then inwardly through 180 degrees so as to
form a third basic strip 26. The ending edge of the second
fixing portion 31 is bent downwardly and then outwardly through
180 degrees so as to from a fourth basic strip 35. The second
fixing portion 31 is inserted into the receiving channel of the
top sheet member 20. Thereafter, the ending edge of the fourth
basic strip 35 engages the ending edge of the third basic
strip 26.
A tenth preferred embodiment of the present invention, as
shown in Fig. 14~ differs from the embodiment shown in Fig. 12
in that the outter section of the first fixing portion 22
projects upwardly a plurality of protruding portions 27 which
resist the ending edge of the first basic strip 34, instead of
the second basic strip 25 of the eighth embodiment.
A eleventh preferred embodiment of the present invention,
-- 7 --
CA21 1 7577
-
as shown in Fig. 15, differs from the embodiment shown in
Fig. 13 in that the outter section of the second fixing portion
31 projects downwardly a plurality of protruding portions 36
which resist the ending edge of the third basic strip 26,
instead of the fourth baic strip 35 of the ninth embodiment.
While the invention has been described in connection with
what is presently considered to be the most practical and
preferred embodiments, it is to be understood that the
invention is not to be limited to the disclosed embodiments but
on the contrary, is intended to cover variours moditications
and equivalent arrangements included within the spirit and
scope of the appended claims which scope is to be accorded the
broadest interpretation so as to encompass all such
modifications and equivalent structures.
