Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
CA 02491955 2005-O1-11
A lance with multiple movement dispenser nozzle for high
pressure cleaning equipments.
DESCRIPTION
The present invention refers to a lance with multiple
movement dispenser nozzle for high pressure cleaning
equipments.
More particularly, the present invention refers to a lance
for high pressure cleaning equipments with a nozzle
which, connected to a support, is activated by the
pressure fluid and continuously moves according to a
rotating-oscillating movement.
It is known that the high pressure cleaning equipments,
generally called hydrocleaners which are used both for
professional and hobby purposes, typically comprise a
plurality of interchangeable fittings in order to obtain
different water jet deliveries. An inlet duct and an outlet
one for the fluid, which is generally water with the
addition of detergent, degreasing and/or polishing
substances which are taken from one or more containers,
are respectively connected to the cleaning equipment. On
the free end of the outlet duct, which is conventionally a
flexible tube, a conventional device for the alternate
connection to the various lances or delivery guns is
placed. Therefore, the outlet water jet can be more or less
concentrated, or blade-oriented according to the various
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nozzles integrated into the lances. One of the known
lances allows delivering the pressure fluid according to a
rotating direction, thus allowing a cleaning with a turbine
jet and avoiding the concentration in one place. In order to
carry out this embodiment of the outlet jet, the dispenser
nozzle integrated into the lance is connected in a
misaligned way to a support which is rotated by the same
water pressure.
According to this embodiment, said rotating support is
provided with a plurality of pass-through holes requiring
complex workings. This is mainly due to the fact that
these holes need accurate dimensions and directions in
such a way that the passage of the pressure fluid causes
the rotation of the same support and, therefore, the one of
the nozzle connected to it.
In addition to this drawback, in the known solutions the
water delivery takes place with a constant rotating
direction and, therefore, it is impossible to give the outlet
fluid further and different directions. Instead a lance with
a nozzle rotating and radially moving in order to increase
the operating range of the pressure fluid jet would be
advantageous.
Object of the present invention is to solve the above-
mentioned drawbacks.
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More particularly, object of the present invention is to
provide a lance for high pressure cleaning equipments or
hydrocleaners provided with a nozzle whose rotating
support be obtained with simple workings and without
making gauged drillings.
A further object of the invention is to provide of a lance
as defined above wherein the dispenser nozzle, under the
effect of the pressure fluid acting on the relevant support,
is also radially moved during its rotation, thus increasing
the operating range of the pressure water fluid.
A further object of the invention is to provide the users
with a lance provided with a multiple movement dispenser
nozzle for high pressure cleaning equipments assuring a
high resistance level and reliability in time, which can be
also easily manufactured and at low cost.
According to the present invention, these and other
purposes are achieved by the lance with multiple
movement dispenser nozzle comprising: a tubular body
provided with an axial duct for the passage of the pressure
fluid, a shaped sleeve matched at the front end of said
tubular body , a rotor or rotating element housed into said
shaped sleeve and a plate-shaped element supported by a
plate associated to the duct, wherein the plate-shaped
element, on the front part facing the rotor, is provided
with a central recess, which circularly extends and with an
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external undulated profile from which a plurality of
additional recesses radially extend, and, on the opposite
rear part, with an integral tang engaging with said plate.
The tubular body can be made of stiff plastic material.
The manufacturing and functional features of the lance
with multiple movement dispenser nozzle of the present
invention can be better understood from the detailed
description which follows wherein reference is made to
the Figures of the attached table representing an
embodiment given only by way of preferred non-
limitative embodiment, wherein:
Figure 1 shows a schematic partially sectioned side view
of the lance with multiple movement dispenser nozzle of
the present invention;
Figure 2 shows a schematic plan view of the support of
the nozzle of Figure 1 on the front part facing the delivery
area of the pressure fluid.
With reference to the above-mentioned Figures, the
lance with multiple movement dispenser nozzle of the
present invention, marked in its whole with 10 in Figure 1,
basically comprises: a tubular body 12, preferably made of
stiff plastic material making the same lance (represented
only in its front end for easiness); a shaped sleeve 14
connected to said front end of the tubular body 12; a rotor
or rotating element 16 housed into said shaped sleeve 14,
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and a plate-shaped element 18 placed into said front end
of the tubular body 12; the rotor 16 engaging into said
plate-shaped element 18.
The tubular body 12 is provided with an axial duct 20 of
the pressurized fluid coming out of the hydrocleaner
which is conveyed towards the front end facing the rotor
16 of the same tubular body 12. In this position the duct
20 radially extends into a plate 22 making the support
means of the plate-shaped element 18.
Said plate-shaped element 18 schematized in detail in
Figure 2, in its front part facing the rotor 16, consists in a
circular-based plate which, on the opposite part facing the
plate 22, is provided, in its central part, with an integral
tang 24 with a circular section engaging with the same
plate 22 being accordingly drilled.
In its front part facing the rotor 16, the plate-shaped
element 18 is provided with a shaped recess 26 which is
formed centrally and around a hub 28 making the axial
extension of the tang 24. Said shaped recess 26 is
circularly extended and defines an undulated external
profile formed by a plurality of curved-concave adjacent
sectors 30 which are jointed among them by a wide ray.
In a preferred and non-critical embodiment, even the
external part of the hub 28 is basically undulated and
defines a substantially hexagonal profile wherein sides
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develop with a slight recess and joint among them with a
limited ray.
From the external part of the shaped recess 26, a
plurality of additional recesses 32 radially extend in the
shape of channels reaching the edge of the plate-shaped
element 18.
According to a preferred embodiment shown in Figure
2, said recesses 32 are four, orthogonally directed each
other and show a substantially semicircular profile.
In its front part facing the rotor 16, said plate-shaped
element 18 is delimited by the shaped sleeve 14, which is
known in itself and defines a shoulder 34 and is fastened
by thread 36 or equivalent fastening means to the tubular
body 12. The diameter of the plate-shaped element 18 is
slightly lower than the one of the seat of the sleeve 14
defined by the shoulder 34 in such a way that the fluid
coming from the duct 20 can externally step over the same
plate-shaped element 18 and get into the sleeve 14
following the path marked by the arrow in Figure 1. The
passage of the fluid is possible because the plate 22 is
provided with one or more radial openings 38, preferably
four radial openings placed at 90°.
The sleeve 14 is provided with an end opening 40 which
is preferably flared and defines a substantially truncated-
conical recess 42 within which the rotor 16 is placed. Said
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rotor 16 which is substantially known in itself, is provided
at its front end with a nozzle 44 having a semicircular
profile matching the hole 40; while to the opposite rear
end said rotor 16 is associated to a toe 46 projecting from
said end towards the plate-shaped element 18 with which
it engages. In particular, the free end of the toe 46
projecting from the nozzle 16 is made by a substantially
hemispherical head 50 placing into the shaped recess 26 of
the plate-shaped element 18. The toe 46 can be integrally
obtained with the nozzle 16, or according to the preferred
embodiment of Figure 1, can be constituted by an
independent element fastened to the same nozzle with any
suitable fastening means such as adhesive means. The
plate-shaped element 18 and the shoulder 34 are in
contact; the passage of the fluid is allowed by the radial
recesses 32 which are present on the plate-shaped element
18. After having reached the recess 42 of the mentioned
sleeve, this fluid gets into the rotor 16 through
conventional radial openings 52 obtained on it and
conveys into the nozzle 44 from which it comes out.
According to the structure of the lance of the present
invention, the fluid comes out not only according to a
rotating path given by the rotor 16 engaged with the plate-
shaped element 18, but also with a simultaneous
oscillating movement due to the fact that the head 50 of
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the toe 46 matches the undulated external profile of the
recess 26 of the same plate-shaped element 18. The
undulated profile of the hub 28 defines the set path
achieved by the toe 46 with its movement; in this way the
movement is not only rotating but also rotating and
oscillating at the same time. The pressure fluid coming
from the duct 20 goes out through the openings 38 of the
plate 22 and, passing outside the plate-shaped element 18,
it reaches the front part of it upon which the recesses 32 in
the shape of channels are obtained. The fluid matching
and placing into said recesses 32 makes the plate-shaped
element 18 rotate and therefore the rotor 16 associated to
its front part through the toe 46.
As can be seen, the advantages obtained by the invention
are clear.
In the lance of the present invention the dispenser nozzle
44 shoots a water jet which directs both circularly and by
continuous oscillation, thus increasing the cleaning effect.
The embodiment of the plate-shaped element 18 is
particularly advantageous, it does not foresee the presence
of pass-through holes to convey the pressure fluid towards
said nozzle.
Even though the present invention has been described
above with reference to one embodiment which is given
only by way of non-limitative example, many changes and
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variants will be clear to a technician according to the
above-mentioned description.
Therefore the present invention means to include all
changes and variants falling within the spirit and the
protective scope of the following claims.
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