The present invention relates to a high-pressure cleaner of the type
set forth in the preamble of claim 1.
Various high-pressure cleaners of the type referred to above are
known. Thus, the international patent publication No. WO 93/09886, upon which the
preamble of claim 1 is based, discloses a high-pressure cleaner of the mobile,
wheel-supported type, having means for storing the high-pressure hose when not
in use. These means are constituted by two mutually opposing "hose hooks", between
which the hose after having been coiled is placed and held in a figure-of-eight
configuration. This arrangement does, however, suffer from the disadvantage that
the hose has to be coiled by hand by the user. Apart from the obvious inconvenience
to the user, this arrangement increases the risk of the hose being kinked and/or
twisted during the coiling, contributing to reducing the effective life of the
DE-A1-3,940,543 discloses a high-pressure cleaner of the type comprising
a trolley with a chassis with wheels and steering handle, in which the motor-pump
unit is placed in the centre of a drum, on which the low-pressure supply hose
and possibly the power supply cable may be stored. The high-pressure hose itself
is coiled by hand by the user and is hung on a hose hook placed on the side of
the chassis. This high-pressure cleaner is adapted for use in locations at long
distances from the supply sources (water and electricity), thus presenting a need
for a long low-pressure supply hose and a long power cable, that may be unwound
at the same time as the user pushes the trolley towards the work site. Thus, with
this arrangement no consideration has been given to a safe handling of the high-pressure
hose, the latter partly being subjected to kinking and twisting due to the manual
coiling, partly is stored in an unprotected state, even when the trolley is moved
away from the work site, thus increasing the risk of the hose being subjected to
external harmful physical or chemical influences, e.g. if it falls off the hose
hook during the movement of the trolley. A further disadvantage is that the user,
when winding and unwinding the low-pressure hose, has to turn both the drum and
the built-in motor-pump unit, thus calling upon a great effort from the user.
US-A-4,967,960 discloses a high-pressure cleaner that comprises an
open frame in which the motor-pump unit and all its other functional elements such
as hose reels are placed unprotected.
DE-A-4,237,356 discloses a high-pressure cleaner of the stationary
type which does not comprise a motor-pump unit since it is connected to an external
supply of pressurized water, and it comprises a hose accumulator placed in a housing.
US-A-5029758 discloses an autonomous portable car washing system having
an internal combustion engine, a pressure pump and a hose accumulator enclosed in
DISCLOSURE OF THE INVENTION
It is the object of the present invention to provide a high-pressure
cleaner of the kind referred to initially, with which it is possible to avoid the
drawbacks in the previously known high-pressure cleaners referred to above, and
this object is achieved with a high-pressure cleaner, according to the invention
additionally exhibiting the features set forth in the characterizing clause of
With this arrangement, the high-pressure hose will be protected against
external harmful influences when not in use, and at the same time, the necessity
of coiling the hose by hand and placing it on more or less unsightly hooks has
With the embodiment set forth in claim 2, the forces acting upon
the high-pressure cleaner in connection with the paying-out or hauling-in of the
high-pressure hose will act upon the cleaner at a relatively low level, thus reducing
the risk of toppling a high-pressure cleaner standing in the upright position.
The embodiment set forth in claim 3 ensures that especially the hauling-in
of the hose takes place uniformly and with little risk of the hose being kinked
Claim 4 relates to an advantageous practical embodiment of the hose
accumulator, a further development of which is set forth in claim 5.
The embodiment set forth in claim 6 makes it possible to control
the winding and unwinding of the high-pressure hose with high accuracy.
Additional advantageous embodiments of the high-pressure cleaner
according to the present invention, the effects of which are explained in the following
detailed part of the present description, are set forth in claims 7 and 8.
BRIEF DESCRIPTION OF THE DRAWINGS
In the following detailed portion of the present description, the
invention will be explained in more detail with reference to the exemplary embodiments
of a high-pressure cleaner according to the invention shown in the drawings, in
DESCRIPTION OF THE PREFERRED EMBODIMENTS
- Figure 1 in a simplified manner and partly cut open shows the most important
components of the high-pressure cleaner together with associated equipment, and
- Figure 2 diagrammatically shows a further embodiment of the placing of the
The high-pressure cleaner 1 in Figure 1 being shown in a simplified
and diagrammatic form and partly cut open, comprises the following main components:
- a motor 2, together with a pump 3 constituting the motor-pump unit of the high-pressure
- a housing 4,
- a handle 5 and wheels 6 to make it easier to move the high-pressure cleaner
- a hose accumulator 7.
The motor 2, in the embodiment shown being electrically driven, is
supplied with electric power from an ordinary electric power source 11a not shown
in detail via a power cable 11, the latter extending directly or indirectly through
the wall of the housing 4 by means of a simple lead-through or junction box 11b.
Further, the motor 2 is mechanically connected to the pump 3, that
may be of any commonly used type, e.g. an axial-piston pump, on the suction side
supplied with cleaning liquid, in the present case ordinary water via a water-supply
conduit 10 connected to a water source 10a. Like the power cable 11, the water-supply
conduit 10 may extend through the wall of the housing 4 directly or indirectly
by means of a simple lead-through or coupling connector 10b.
The high-pressure side of the pump 3 is connected via a high-pressure
conduit 9, preferably in the form of a piece of hose, to a coupling device (not
shown) connected to one end of a high-pressure hose 13 in the hose accumulator
7. The other end of the high-pressure hose 13 is in the conventional manner connected
to an ordinary cleaning gun 12 by means of another coupling device (not shown).
During use, i.e. during the normal operational condition, the high-pressure
cleaner 1 is placed standing upright, and in the exemplary embodiment shown in
Figure 1, the hose accumulator 7 is situated close to the bottom part of the high-pressure
cleaner 1, being further provided with a hand crank 8 for manual winding and unwinding
of the hose 13, the latter leaving the housing 4 through a slot 14, in this exemplary
embodiment being oriented transversely or horizontally.
The placing of the hose accumulator 7 close to the bottom part of
the housing 4 and below the motor-pump unit 2,3 constitutes one possible preferred
embodiment, but the hose accumulator 7 may also be placed and oriented differently,
e.g. as in the example shown in Figure 2. The transverse orientation of the slot
4 as shown in Figure 1 may be replaced by a e.g. longitudinally extending slot
as shown in the Figure 2.
The enclosing of the hose accumulator 7, provides effective protection
of the hose against external harmful influences when the high-pressure cleaner
is not in use. The danger in having an unprotected high-pressure hose, as is the
case in the cleaners known up to the present, is that the hose may be damaged
in such a manner that the user does not discover the damage until the hose is put
into use, i.e. when high-pressure is being applied to it. This may, of course,
lead to quite serious consequences for the user, if the hose is e.g. partially
cut through and bursts when the user starts the high-pressure cleaner.
Further, the placing of the hose accumulator 7 in the housing 4 provides
the very obvious advantage that the hose 13 under all conditions, especially when
being fully wound on the accumulator drum, does not "drift about" and so constitutes
a risk, especially for persons being present in the area around the high-pressure
cleaner, such as is the case with the hose-storage devices known up to the present.
Likewise, in the previously known high-pressure cleaners, the hose may inadvertently
either fall down from the supporting hooks in its entirety or unwind itself partially
from the latter, hence constituting a corresponding risk.
In order to additionally achieve a winding and unwinding of the hose
13, that is as homogeneous as possible, the hose accumulator 7 may further be provided
with a hose-guiding device (not shown) causing the hose to be wound and unwound
according to a predetermined pattern.
The hose accumulator 7, which is not shown in detail, comprises a
drum, on which the hose 13 may be wound, the requisite fittings for securing the
accumulator to the housing, as well as one or two bearings for supporting the
drum for rotation at one side or both sides, of which at least one bearing functions
as a coupling device between the high-pressure hose 13 and the high-pressure conduit
9 of the pump 3. The bearing concerned may be constructed with e.g. a rotating
hose connector for the high-pressure hose, and further with e.g. a sealing ring
for providing a seal between the connector and the hose.
As will be seen from the above description, the high-pressure cleaner
according to the present invention is relatively compact and will - all else being
equal-occupy less space both during stationary storage and during e.g. transportation
with a vehicle, such as an automobile or the like, than the previously known high-pressure
cleaners with externally supported hose.
In the exemplary embodiment shown, the drum in the hose accumulator
7, on which the hose 13 may be wound, is operated by means of a hand crank 8, but
it also lies within the scope of the present invention to replace or supplement
this hand crank with a fully or partly automatic electrically or hydraulically
driven winding and unwinding mechanism.
The high-pressure hose 13 is preferably made from hose material of
the type consisting of a fluid-tight matrix of rubber or rubber-like material reinforced
by helically wound and/or braided wires or filaments having a high tensile strength.
A hose made of such a material has proved to be sufficiently flexible to be wound
on and unwound from the accumulator drum without difficulty, at the same time
being capable of withstanding the high pressures involved.
LIST OF PARTS
- high-pressure cleaner
- hose accumulator
- hand crank
- high-pressure conduit
- water-supply conduit
- water source
- lead-through or junction box
- power cable
- electric power source
- lead-through or junction box
- cleaning gun
- high-pressure hose