[0001] The sector covered by the technique used for this patent is that of the manufacture
of fume extractor hoods, essentially of the household type, and in particular of the
industrial type.
Details as regards the prior art:
[0002] The present prior art takes the installations to this end to be dependent on a system
that has, through its aesthetic and static configuration (chimney type), brought about
a problem of power and efficiency loss in fume extraction, with the distance between
the collector or hood and the base from which extraction is to be made being where
the main problem of optimum extraction lies.
[0003] ES U 229 295 covers the protection of a mobile hood laid out in two parts, one outside
and one inside, that determine the regulation of the height by sliding within one
another, and that are stabilized by counterweights. This device has the disadvantage
that either the manufacture has to be extremely accurate, so leading to very expensive
results, or that absorption losses occur if the adjustment between the two telescopic
parts is not very accurate. Furthermore, the absorption surface is smaller as all
the inner surface of the piece is taken up, so providing lesser suction flow.
[0004] The present invention has as its object a new mobile extractor hood with a concertina
type collector pipe, with the particular novelty that the concertina itself should
be fitted in the neck of kitchen hoods, with its purpose being to provide these with
mobility in a vertical plane.
[0005] This new mobile extractor hood, whose system is mainly based on the application of
a concertina type flexible pipe, fixed at one end to the neck of the hood, and on
its fixing to the general fume extractor collector at the other end, results in a
hood that has highly useful mobility upward and downward, and which, by means of a
pulley and brake mechanism enables the required distance from the base from which
extraction is made to be obtained, and enables its later retracting to the locking
point, or to any distance that is suitable or decided upon to maintain, with the added
advantage that the possibility of being able to fit the extractor fan at both ends,
either inside the hood or in the inlet of the general collector, leads to a greater
range of installation options for the installation.
[0006] The advantage that this new mobile extractor hood with a concertina type collector
pipe contributes to the extraction of fumes is obvious, and it is very simple as a
whole, since it stems from a simple and functional structural basis in its basic conception
(since mechanical or electrical systems can be adapted to its special function of
vertical movement), but as has already been said, its operation system is economical,
practical and efficient, thus giving it advantages as regards manufacturing costs
in such a way as to bring about an increase in demand in the sector, due to the particular
economic quality of purchasing power, since one of the objectives of this invention
is to provide the fume extraction installation with the greatest efficiency at the
lowest cost.
[0007] The mobile extractor hood with a concertina type collector pipe that is the object
of this registration enables steam, smoke, grease, etc. to be collected by bringing
the hood close to the base from which the emission to be extracted is coming, thus
preventing draughts of air breaking the absorption flow, since these do not have physical
space in which to get out, because, as the user determines, the hood can be placed
practically on top of the source of the smoke or steam to be collected, with structural
and constitutive aspects that considerably differ from the different systems at present
known of used for these purposes.
[0008] In order to make the explanation that is to follow clearer, a sheet of drawings that
represent the essence of this invention in two figures is enclosed.
[0009] Figure 1 shows a vertical elevational and schematic view of the installation, according
to an example of its practical execution.
[0010] Figure 2 shows a plan view of this same execution.
[0011] Figure 1 shows a general vertical elevational and longitudinal projection of the
mounted assembly, in which one can see the linkage of the concertina type collector
tube, between the upper part of the hood and next to the fan, by means of linking
terminals, and the upper fixed support, with, on both sides, sliding guides and a
mobilizing pullwire or dragline for raising or lowering the hood, by means of a pulley
and a brake.
[0012] Figure 2 shows a conventional plan view of the extractor hood, connected to the concertina
type collector pipe and the sliding vertical parallel guides joined to the hood and
sliding over the upper fixed support.
[0013] In both these figures: 1 indicates the extractor hood that can be given a conical
or pyramidal body shape, for example, to which, at the upper end, the concertina type
collector pipe 2 is linked, joined to the extractor fan 3, by means of linking terminals
4 inserted by a thread system, inserted and disconnected by a small turn or fixed
on by means of a mounting pin or peg, with the concertina type collector pipe 2 being
the fundamental basis of the installation that is object of this invention, whose
special qualities allow the movement of the hood 1 in an upward or downward"direction.
[0014] Along with all the basic elements mentioned above, the installation is provided with
two guides 5 in parallel position, along which the hood 1 slides in a vertical direction,
preventing any lateral swaying and providing the whole assembly with rigidity, as
can be seen from figure 1.
[0015] The mobilization system with vertical movement is based on a pullwire or dragline
7, which, fixed by the lower end to the upper part of the hood 1, makes this go up
or go down by means of a pulley and a brake, this operation being carried out by the
user. This pullwire can be fitted either inside or outside the hood, as a esthetic
or accessibility criteria, etc. may determine.
[0016] The terminals of link 4 at the ends of the concertina type collector pipe, enable
this to be joined to the hood 1, at one end, and at the other end to the general collector
or to the inlet of the extractor 3, if this has been installed at the upper end.
[0017] Depending on the economic criteria in its manufacture, the different pieces of the
mobile extractor hood, such as for example the linking terminals 4, hood 1 and others,
can be made of metal, plastic, by injection, of glass, or of several materials at
the same time, with said linking terminals 4 being fitted with a thread system that
for example, with a small turn, allows simple assembly of the whole unit, facilitating
the separate cleaning of the different parts that make up the extractor unit.
[0018] Fixed with the usual kind of fixing screws to the ceiling or to an upper anchorage
point, at least two male (or female) guides 5 hang down in parallel positions, these
being joined at their ends to a rectangular piece and to an assembly with an internal
semicircle configuration 6. On the other side, and fixed to the upper plate of the
hood 1, there are the two female (or male ) guides, 5 that are set out on a vertical
position and also joined at their ends to part 6, but placed in the opposite way,
thus bringing about the sliding of guides 5, with the collector pipe 2 being unobstructed
by them.
[0019] We must state the possibility of having the different parts made of a variety of
materials, sizes, shapes and colours, with it also being able to introduce such variations
of constructive type as practice recommends, whilst maintaining the essence of this
invention.
1.- A mobile extractor hood with a concertina type collector pipe characterized in that
it includes a concertina type collector pipe (2), joined at the bottom end and through
a linking terminal (4), provided with a thread system of insertion and disconnection
by a small turn or fixed on with a pin or peg to the upper part of the hood and at
the upper end, to the general collector located in the ceiling or to an upper anchorage
point, for example the wall, that can achieve the vertical movement of the collector
at the same time as allowing its collecting function in any position, with the ventilator
fan being located in the upper part of the general collector or inside the hood.
2.- Extractor hood, according to claim 1, characterized in that it includes male (female)
guides (5), set out vertically and fixed to the ceiling or to an upper anchorage point,
for example the wall, that can move along both sides of the concertina type collector
pipe, and to which other vertical female (male) guides are joined, being linked at
their bottom end to the extractor hood, in accordance with the possible vertical movement.
3.- Extractor hood, according to claims 1 and 2, characterized in that it includes a
positioning system or mechanism, consisting of a pullwire (7) joined at its bottom
end to the upper part of the hood, going up to a point close to the ceiling or to
an upper part in which there is an anchorage point, where, for example, a pulley is
installed, after which a position brake is installed, and finished off at the end
hanging down with a control or pull to be drawn on by the user, for lifting or lowering
the device, with the possibility of optionally installing a mechanical/electrical
system.