EP2467214A1 - Surface-cleaning head - Google Patents

Surface-cleaning head

Info

Publication number
EP2467214A1
EP2467214A1 EP09781919A EP09781919A EP2467214A1 EP 2467214 A1 EP2467214 A1 EP 2467214A1 EP 09781919 A EP09781919 A EP 09781919A EP 09781919 A EP09781919 A EP 09781919A EP 2467214 A1 EP2467214 A1 EP 2467214A1
Authority
EP
European Patent Office
Prior art keywords
cleaning head
surface cleaning
head according
spray arm
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09781919A
Other languages
German (de)
French (fr)
Other versions
EP2467214B1 (en
Inventor
Jürgen Binder
Vitali Fischer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alfred Kaercher SE and Co KG
Original Assignee
Alfred Kaercher SE and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alfred Kaercher SE and Co KG filed Critical Alfred Kaercher SE and Co KG
Priority to PL09781919T priority Critical patent/PL2467214T3/en
Publication of EP2467214A1 publication Critical patent/EP2467214A1/en
Application granted granted Critical
Publication of EP2467214B1 publication Critical patent/EP2467214B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/024—Cleaning by means of spray elements moving over the surface to be cleaned

Definitions

  • the invention relates to a surface cleaning head for cleaning a surface, with a hood-shaped, downwardly open housing in which at least one spray arm is rotatably mounted about an axis of rotation, wherein the spray arm at a distance from the axis of rotation carries a nozzle which, with pressurized cleaning liquid can be acted upon and rotates together with the spray arm about the axis of rotation for acting on the surface to be cleaned with a liquid jet, and with a protective disc which covers the at least one spray arm to the open bottom of the housing and defines an annular, penetrated by retaining webs fluid passage for passage therethrough the liquid jet, wherein the at least one spray arm is rotatable relative to the protective disk.
  • Such a surface cleaning head is known from US 3,832,069. It is suitable, for example, for cleaning hard surfaces, for example patio floors, garage entrances and also garage doors.
  • the pressure line of a high-pressure cleaning device can be connected to the surface cleaning head. Pressurized cleaning fluid may then be supplied to the nozzle located at the at least one spray arm. With the help of the nozzle, the cleaning fluid can be applied to the surface to be cleaned.
  • the nozzle undergoes a recoil, under the effect of the spray arm is rotated about the rotation axis in rotation. This makes it possible to apply a relatively large area within a short time with cleaning liquid.
  • a protective pane is arranged beneath the spray arm in the surface cleaning head known from US Pat. No. 3,832,069. This defines a liquid passage so that the jet of liquid emanating from the nozzle can reach the surface to be cleaned.
  • the fluid passage is penetrated by a plurality of retaining webs, which extend to a side wall of the housing and thereby stabilize the protective disk.
  • the liquid jet which rotates about the axis of rotation, strikes a holding web at intervals, which passes through the liquid passage.
  • the protective pane is vibrated, which leads to a clearly audible noise.
  • Object of the present invention is to develop a surface cleaning head of the type mentioned in such a way that it has a smaller
  • the holding webs which extend through the liquid passage are distributed unevenly in the circumferential direction. This has the consequence that the liquid jet emanating from the nozzle at irregular intervals on a holding web meets. Due to the temporally irregular loading of adjacent holding webs with liquid under pressure, no vibration resonance can form in the protective disk, which in turn leads to the noise development of the surface cleaning head according to the invention being relatively small.
  • two diametrically opposite spray arms are rotatably mounted about the axis of rotation in an advantageous embodiment of the surface cleaning head according to the invention in the housing, each carrying a nozzle at a distance from the axis of rotation.
  • a first liquid jet and a second liquid jet can be directed to the surface to be cleaned, which rotate around the axis of rotation and are arranged offset in the circumferential direction by 180 ° to each other.
  • the holding webs are not diametrically opposed to each other in pairs, as this ensures that not simultaneously meet both liquid jets on a holding web, but rather occurs when hitting the first liquid jet on a holding web of the second liquid jet unhindered through the liquid passage , It has been shown that thereby the noise can be kept low even with the use of two diametrically opposed spray arms.
  • an odd number of retaining webs is used, for example, three, five, seven or nine retaining webs can be provided, which are distributed unevenly in the circumferential direction.
  • the holding webs are preferably aligned radially to the axis of rotation of the spray arms.
  • the protective disc forms in an advantageous embodiment of the invention, a central shield, which is arranged below the at least one spray arm and which is connected via the holding webs with a protective shield surrounding in the circumferential direction retaining ring. It has been shown that the use of the retaining ring makes it possible to mechanically stabilize the central protective shield, particularly in its outer edge region adjoining the fluid passage.
  • the shield has a plurality of openings.
  • the protective shield is configured in a grid or net shape.
  • the protective shield is integrally connected to the retaining ring via the retaining webs.
  • the shield can form a one-piece plastic molding in combination with the retaining webs and the retaining ring.
  • the shield includes a plurality of reinforcing ribs that mechanically stabilize the shield.
  • the reinforcing ribs are arranged in the radial direction in alignment with a holding web, via which the protective shield is connected to the outer retaining ring. It is favorable if the reinforcing ribs protrude from the protective shield on the upper side and / or on the underside. This increases the stabilizing effect of the reinforcing ribs.
  • the height of the reinforcing ribs increases or decreases with increasing radial distance from the axis of rotation.
  • the reinforcing ribs extend transversely to the shield, wherein their height varies depending on the radial distance from the axis of rotation.
  • the height of the reinforcing ribs continuously increases or decreases with increasing distance to the axis of rotation.
  • all reinforcing ribs both have a protruding upward from the shield reinforcing portion and a projecting downwardly from the shield reinforcing portion, wherein the height of one of the two reinforcing portions, preferably the height of the upper reinforcing portion, with increasing radial Section continuously reduced in the same way as the height of the other reinforcing section, preferably the lower reinforcing portion, increases with increasing radial distance.
  • the reinforcing ribs form a mechanical reinforcement of the protective shield.
  • the latter is preferably produced as a plastic molded part in an injection molding process.
  • the upwardly and downwardly projecting from the shield reinforcing portions flow channels, which ensure that sufficient plastic material can flow to the outer edge regions of the injection mold.
  • the reinforcing ribs thus also have an injection molding function in addition to their reinforcing function.
  • the retaining ring can be arranged on the housing of the surface cleaning head. In particular, it can be provided that an edge portion of the housing forms the retaining ring.
  • the retaining ring is arranged at a distance from the housing.
  • the distance of the retaining ring to the housing in the radial direction is preferably less than the radial extent of the liquid passage.
  • the retaining ring in the axial direction with respect to the axis of rotation of the at least one spray arm has an upper end portion disposed within the housing and a lower end portion projecting beyond the lower edge of the housing.
  • the upper end portion of the retaining ring is thus circumferentially surrounded by the housing. This allows the housing form a guide for the retaining ring in the Assembly of the protective disk by the protective disk, whose outer edge region is formed by the retaining ring, is inserted from below into the housing.
  • the lower end portion of the retaining ring may protrude from the housing in the axial direction.
  • the retaining ring can thereby form a shock protection, which protects the housing against damage when the surface cleaning head approaches the surface to be cleaned inadvertently, since with such an approach the retaining ring with its axially projecting area contacts the surface to be cleaned, even before the Housing can strike on the surface.
  • a flexible splash guard is arranged, which protrudes in the axial direction over the lower edge of the retaining ring is particularly advantageous.
  • a flexible splash guard for example, a rubber lip or a bristle ring can be used.
  • the flexible splash guard surrounds the lower end portion of the retaining ring in the circumferential direction, and as the surface cleaning head passes along the surface to be cleaned, the splash guard may contact the surface without causing the retaining ring to contact the surface.
  • the material thickness of the retaining ring is less than its axial extent. The retaining ring thus forms a kind of pipe section or sleeve.
  • the sleeve surrounds the central shield of the protective disk in the circumferential direction and forms a mechanical stabilization.
  • the protective disk is held in an advantageous embodiment of a bearing shaft on which the at least one spray arm is rotatably mounted. It can be provided that the protective disk relative to the bearing shaft is rotatable. Alternatively, the protective disk can be fixed in rotation in or on the housing, for example on the bearing shaft.
  • the surface cleaning head has only nozzles, which are each held on a rotating about the axis of rotation spray arm. These can be arranged in the region of the liquid passage of the protective disk, so that the radially outer ends of the holding webs have a greater distance from the axis of rotation than the nozzles.
  • the surface cleaning head comprises at least one further nozzle, which is arranged radially offset from the shield, that is, a greater radial distance from the axis of rotation than the outer edge of the protective disk.
  • the additional nozzle can be rotatably held in the housing and used, for example, for cleaning corner areas of a surface used.
  • Figure 1 a perspective view of a first embodiment of a surface cleaning head according to the invention
  • Figure 2 is a longitudinal sectional view of the surface cleaning head of Figure 1
  • Figure 3 is a bottom view of the surface cleaning head of Figure 1
  • Figure 4 is a perspective view of a protective shield of the surface cleaning head of Figure 1 obliquely from above
  • Figure 5 a perspective view of the shield of Figure 4 obliquely from below;
  • FIG. 6 shows a perspective view of a second embodiment of a surface cleaning head according to the invention.
  • FIG. 7 shows a longitudinal sectional view of the surface cleaning head from FIG. 6.
  • FIGS. 1 to 5 show a first embodiment of a surface cleaning head according to the invention, which is designated overall by the reference numeral 10.
  • This includes a hood-shaped, downwardly open housing 12 with an annular in plan view, self-contained cylinder wall 14 which carries at its lower edge 15 a circumferential flexible splash guard in the form of a bristle ring 17.
  • the cylinder wall 14 is covered by a ceiling wall 19.
  • a substantially V-shaped attachment part 21 is attached to the cylinder wall 14, to which a cover 22 covering the ceiling wall 19 in a central area adjoins above the ceiling wall 19.
  • a first handle 23 and a second handle 24 are arranged, which can be encompassed by the user for supporting the surface cleaning head 10th
  • the cover 22 defines above the ceiling wall 19 a distribution chamber 26, and the cylinder wall 14 surrounds below the ceiling wall 19 a spray chamber 28.
  • the attachment part 21 defines an additional space 30.
  • a central distributor part 32 is arranged, in which a supply pipe 34 opens , which is mounted about a transverse to the pipe axis 35 aligned pivot axis 36 pivotally mounted in the distributor part 32.
  • the supply pipe 34 carries a connecting element 38, so that a pressure line, which is known per se and therefore not shown in the drawing, of a high-pressure cleaning device can be connected to the supply pipe 34.
  • the central distributor part 32 is in flow connection via a first feed line 40 with two diametrically opposite spray arms 42, 44, which each have a flow channel 46 or 48 and carry a nozzle 50 or 52 at their free end.
  • the flow channels 46, 48 extend through the spray arms 42 and 44, respectively.
  • the flow channels 46, 48 are shown only partially.
  • the nozzles 50, 52 are acted upon by the supply pipe 34 and the distributor part 32 and the first supply line 40 and the flow channels 46 and 48 with pressurized cleaning liquid and produce an obliquely downwardly directed liquid jet of a cleaning liquid.
  • the liquid jets Upon exiting the nozzles 50, 52, the liquid jets exert a torque on the spray arms 42, 44 by reaction forces and cause them to rotate about a rotation axis 54 aligned coaxially with the longitudinal axis of the first lead 40.
  • a first liquid jet and a second liquid jet are directed to a surface to be cleaned.
  • a second supply line 56 runs inside the distributor chamber 26 and dips into the additional space 30 on the upper side and carries an additional nozzle 58 at its free end.
  • the additional nozzle 58 is designed in the form of a spray nozzle and held in the housing 12 in a fixed manner in contrast to the rotating nozzles 50, 52. From the additional nozzle 58, pressurized cleaning fluid can be dispensed, for example for cleaning a corner region of a surface to be cleaned.
  • the supply of cleaning liquid from the supply pipe 34 via the distributor part 32 is carried out selectively either only to each of a spray arm 52, 54 arranged nozzles 50, 52 or to the additional nozzle 58.
  • the distributor part 32 has a switching device 60 shown only schematically in the drawing which in a first switching position releases the flow path between the supply pipe 34 and the first supply line 40 and in a second switching position the flow path between the supply pipe 34 and the second supply line 56.
  • the two spray arms 42, 44 are rotatably mounted on a bearing shaft 62 which is held on the first supply line 40 and flow channels for establishing the flow connection between the first supply line 40 and the flow channels 46, 48 of the two spray arms 42, 44.
  • the bearing shaft 62 protrudes downwards over the spray arms 42, 44.
  • the bearing shaft 62 carries a protective element in the form of a protective screen 64, the constructive structure of which is clear in particular from FIGS. 4 and 5.
  • the protective screen 64 comprises a central, circular shield 66, which is configured in the form of a lattice and has a multiplicity of perforations 68. It is divided by radially extending reinforcing ribs 70 into a plurality of sectors 71 to 77, each extending over a different angular range in the circumferential direction.
  • the reinforcing ribs 70 each have an upper-side reinforcing portion 70a and a lower-side reinforcing portion 70b.
  • the upper-side reinforcing section 70a protrudes from the protective shield 66 on the upper side, that is to say it is oriented perpendicular to it, its height being reduced with increasing distance from the axis of rotation 54. In a radial plane, the upper-side reinforcing section forms a triangular shape.
  • the lower-side reinforcing portion 70b protrudes from the shield 66 on the lower side and is also aligned perpendicular thereto.
  • the height of the lower-side reinforcing portion increases in the same manner as the height of the upper-side reinforcing portion 70a decreases.
  • the lower-side reinforcing section 70b also defines a triangular shape.
  • the reinforcing ribs 70 form a mechanical reinforcement of the protective shield 66 with their top and bottom reinforcing portions 70a and 70b.
  • the latter is made of a plastic material by an injection molding process. During the injection molding process, the reinforcing sections for the liquid plastic material constitute flow channels which ensure that sufficient plastic material can flow to the outer edge regions of the injection molding tool.
  • a retaining ring 78 which is integrally connected via aligned with the reinforcing ribs 70 retaining webs 80 with the shield 66.
  • an annular fluid passage 82 extends, which is penetrated by the retaining webs 80.
  • the retaining ring 78 is designed in the manner of a very short piece of pipe or in the manner of a sleeve by its material thickness is considerably less than its extension in the axial direction with respect to the axis of rotation 54 of the spray arms 42, 44.
  • An axial upper end portion 84 of the retaining ring 78 is within of the housing 12 is arranged by being circumferentially surrounded by the free end portion of the cylinder wall 14, whereas an axial lower end portion 86 projects downwardly beyond the lower edge 15 of the cylinder wall 14 and thus over the housing 12.
  • the lower end portion 86 is in the circumferential direction of the flexible splash guard, namely from
  • the protective plate 64 When mounting the surface cleaning head 10, the protective plate 64 can be inserted from below into the housing 12. In this case, the lower end region of the cylinder wall 14 forms a guide for the protective disk 64.
  • the annular fluid passage 82 is arranged in alignment with the nozzles 50 and 52, so that the liquid jets emanating from the nozzles 50, 52 through the Liquid passage 82 can pass to act on the surface to be cleaned.
  • the nozzles 50, 52 rotate about the axis of rotation 54 when they are subjected to pressurized liquid. They each release a liquid jet.
  • the respective liquid jet impinges on a holding web 80 at irregular intervals, but it is ensured that two holding webs can not be acted upon simultaneously by the two liquid streams coming from the nozzles 50 , 52 go out. This is ensured by the fact that the holding webs 80 are not aligned in pairs diametrically opposite each other, as is the case with the two spray arms 42, 44.
  • the second liquid jet can pass through the liquid passage 82 unhindered.
  • the protective disk 64 can not be put into resonant oscillation by the circulating liquid jets, since the holding webs 80 are acted on at irregular intervals by a liquid jet. This uneven arrangement of the holding webs ensures that the noise of the surface cleaning head 10 can be kept low.
  • FIGS. 6 and 7 A second embodiment according to the invention of a surface cleaning head according to the invention is shown in FIGS. 6 and 7 and is generally designated by the reference numeral 90.
  • the surface cleaning head 90 is configured substantially identical to the one described above with reference to FIGS.
  • the same reference numerals are used in Figures 6 and 7 as in Figures 1 to 5 and to avoid repetition, reference is made to the above explanations with respect to these components.
  • the surface cleaning head 90 shown in Figures 6 and 7 differs from the above-described surface cleaning head 10 in that it has only the two nozzles 50, 52, which are respectively held at the free end of a spray arm 42 and 44 and when pressurized Rotate cleaning fluid about the axis of rotation 54.
  • a non-rotatable additional nozzle is not used in the surface cleaning head 90.
  • the surface cleaning head 90 also has a protective disk 64, as has been explained above with reference to FIG.
  • the protective disk 64 has a central shield 66, which is surrounded in the circumferential direction by a retaining ring 78, wherein between the shield 66 and the retaining ring 78, a fluid passage 82 is arranged, which is penetrated by retaining webs 80, wherein the retaining webs 80 also head in the surface cleaning 90 are distributed unevenly in the circumferential direction.
  • the uneven arrangement of the holding webs 80 also ensures the surface cleaning head 90 that the noise when exposed to pressurized cleaning fluid can be kept relatively low, since a resonant vibration of the protective plate 64 by the impinging in time irregular order on the holding webs 80 liquid jets not can train.

Landscapes

  • Nozzles (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

The invention relates to a surface-cleaning head (10; 90) comprising a domed housing (12) which is open at the bottom and in which at least one spray arm (42, 44) is mounted so as to rotate about a rotational axis (54), the spray arm (42, 44) being equipped with a nozzle (50, 52) at a distance from the rotational axis (54). Pressurized cleaning fluid can act upon said nozzle, which rotates together with the spray arm (42, 44) about the rotational axis (54) in order to apply a fluid stream to the surface to be cleaned. The surface-cleaning head also comprises a protective screen (64) which covers the at least one spray arm (42, 44) towards the open lower face of the housing (12) and defines an annular fluid passage (82) through which the fluid stream passes, said passage being penetrated by retaining struts (80), it being possible for the at least one spray arm (42, 44) to be rotated relative to the protective screen (64). The aim of the invention is to further develop the surface-cleaning head such that less noise is developed. According to the invention, this is achieved in that the retaining struts (80) are unevenly distributed in the circumferential direction.

Description

Flächenreinigungskopf  Surface cleaning head
Die Erfindung betrifft einen Flächenreinigungskopf zur Reinigung einer Fläche, mit einem haubenförmigen, nach unten offenen Gehäuse, in dem zumindest ein Sprüharm um eine Drehachse drehbar gelagert ist, wobei der Sprüharm im Abstand zur Drehachse eine Düse trägt, die mit unter Druck stehender Reini- gungsflüssigkeit beaufschlagbar ist und zusammen mit dem Sprüharm um die Drehachse umläuft zur Beaufschlagung der zu reinigenden Fläche mit einem Flüssigkeitsstrahl, und mit einer Schutzscheibe, die den mindestens einen Sprüharm zur offenen Unterseite des Gehäuses abdeckt und einen ringförmigen, von Haltestegen durchgriffenen Flüssigkeitsdurchlass definiert zum Hin- durchtreten des Flüssigkeitsstrahls, wobei der mindestens eine Sprüharm relativ zur Schutzscheibe verdrehbar ist. The invention relates to a surface cleaning head for cleaning a surface, with a hood-shaped, downwardly open housing in which at least one spray arm is rotatably mounted about an axis of rotation, wherein the spray arm at a distance from the axis of rotation carries a nozzle which, with pressurized cleaning liquid can be acted upon and rotates together with the spray arm about the axis of rotation for acting on the surface to be cleaned with a liquid jet, and with a protective disc which covers the at least one spray arm to the open bottom of the housing and defines an annular, penetrated by retaining webs fluid passage for passage therethrough the liquid jet, wherein the at least one spray arm is rotatable relative to the protective disk.
Ein derartiger Flächenreinigungskopf ist aus der US 3,832,069 bekannt. Er eignet sich beispielsweise zur Reinigung von Hartflächen, beispielsweise Ter- rassenböden, Garageneinfahrten und auch Garagentoren. Zur Reinigung der Hartflächen kann an den Flächenreinigungskopf die Druckleitung eines Hochdruckreinigungsgerätes angeschlossen werden. Unter Druck stehende Reinigungsflüssigkeit kann dann der an dem mindestens einen Sprüharm angeordneten Düse zugeführt werden. Mit Hilfe der Düse kann die Reinigungsflüssig- keit auf die zu reinigende Fläche aufgebracht werden. Die Düse erfährt hierbei einen Rückstoß, unter dessen Wirkung der Sprüharm um die Drehachse in Drehung versetzt wird. Dies ermöglicht es, eine verhältnismäßig große Fläche innerhalb kurzer Zeit mit Reinigungsflüssigkeit zu beaufschlagen. Um zu verhindern, dass auf der zu reinigenden Fläche angeordnete Gegenstände, beispielsweise Kieselsteine, in den Bereich des mindestens einen Sprüharms gelangen, ist bei dem aus der US 3,832,069 bekannten Flächenreinigungskopf unterhalb des Sprüharms eine Schutzscheibe angeordnet. Diese definiert einen Flüssigkeitsdurchlass, so dass der von der Düse ausgehende Flüssigkeitsstrahl auf die zu reinigende Fläche gelangen kann. Der Flüssigkeitsdurchlass wird von mehreren Haltestegen durchgriffen, die sich bis zu einer Seitenwand des Gehäuses erstrecken und dadurch die Schutzscheibe stabilisieren. Such a surface cleaning head is known from US 3,832,069. It is suitable, for example, for cleaning hard surfaces, for example patio floors, garage entrances and also garage doors. To clean the hard surfaces, the pressure line of a high-pressure cleaning device can be connected to the surface cleaning head. Pressurized cleaning fluid may then be supplied to the nozzle located at the at least one spray arm. With the help of the nozzle, the cleaning fluid can be applied to the surface to be cleaned. The nozzle undergoes a recoil, under the effect of the spray arm is rotated about the rotation axis in rotation. This makes it possible to apply a relatively large area within a short time with cleaning liquid. In order to prevent objects arranged on the surface to be cleaned, for example pebbles, from reaching the area of the at least one spray arm, a protective pane is arranged beneath the spray arm in the surface cleaning head known from US Pat. No. 3,832,069. This defines a liquid passage so that the jet of liquid emanating from the nozzle can reach the surface to be cleaned. The fluid passage is penetrated by a plurality of retaining webs, which extend to a side wall of the housing and thereby stabilize the protective disk.
Der um die Drehachse rotierende Flüssigkeitsstrahl trifft in zeitlichen Abständen auf einen Haltesteg, der den Flüssigkeitsdurchlass durchgreift. Dadurch wird die Schutzscheibe in Schwingungen versetzt, die zu einem deutlich hörbaren Geräusch führen. The liquid jet, which rotates about the axis of rotation, strikes a holding web at intervals, which passes through the liquid passage. As a result, the protective pane is vibrated, which leads to a clearly audible noise.
Aufgabe der vorliegenden Erfindung ist es, einen Flächenreinigungskopf der eingangs genannten Art derart weiterzubilden, dass er eine geringere Object of the present invention is to develop a surface cleaning head of the type mentioned in such a way that it has a smaller
Geräuschentwicklung aufweist. Diese Aufgabe wird bei einem Flächenreinigungskopf der gattungsgemäßen Art erfindungsgemäß dadurch gelöst, dass die Haltestege in Umfangsrichtung ungleichmäßig verteilt angeordnet sind. Has noise. This object is achieved in a surface cleaning head of the generic type according to the invention that the holding webs are arranged distributed unevenly in the circumferential direction.
Beim erfindungsgemäßen Flächenreinigungskopf sind die den Flüssigkeits- durchlass durchgreifende Haltestege in Umfangsrichtung ungleichmäßig verteilt angeordnet. Dies hat zur Folge, dass der von der Düse ausgehende Flüssigkeitsstrahl in ungleichmäßigen zeitlichen Abständen auf einen Haltesteg trifft. Aufgrund der zeitlich unregelmäßigen Beaufschlagung benachbarter Haltestege mit unter Druck stehender Flüssigkeit kann sich bei der Schutzscheibe keine Schwingungsresonanz ausbilden und dies wiederum führt dazu, dass die Geräuschentwicklung des erfindungsgemäßen Flächenreinigungskop- fes verhältnismäßig gering ist. In the surface cleaning head according to the invention, the holding webs which extend through the liquid passage are distributed unevenly in the circumferential direction. This has the consequence that the liquid jet emanating from the nozzle at irregular intervals on a holding web meets. Due to the temporally irregular loading of adjacent holding webs with liquid under pressure, no vibration resonance can form in the protective disk, which in turn leads to the noise development of the surface cleaning head according to the invention being relatively small.
Um die Reinigungswirkung zu steigern, sind bei einer vorteilhaften Ausführungsform des erfindungsgemäßen Flächenreinigungskopfes im Gehäuse zwei einander diametral gegenüberliegende Sprüharme um die Drehachse drehbar gelagert, die im Abstand zur Drehachse jeweils eine Düse tragen. Dadurch kann auf die zu reinigende Fläche gleichzeitig ein erster Flüssigkeitsstrahl und ein zweiter Flüssigkeitsstrahl gerichtet werden, die um die Drehachse umlaufen und in Umfangsrichtung um 180° versetzt zueinander angeordnet sind. Bei einer derartigen Ausgestaltung ist es günstig, wenn die Haltestege einander nicht paarweise diametral gegenüberliegen, denn dadurch wird sichergestellt, dass nicht gleichzeitig beide Flüssigkeitsstrahlen auf einen Haltesteg treffen, vielmehr tritt beim Auftreffen des ersten Flüssigkeitsstrahles auf einen Haltesteg der zweite Flüssigkeitsstrahl ungehindert durch den Flüssigkeitsdurchlass hindurch. Es hat sich gezeigt, dass dadurch die Geräuschentwicklung auch bei Einsatz von zwei einander diametral gegenüberliegenden Sprüharmen gering gehalten werden kann. In order to increase the cleaning effect, two diametrically opposite spray arms are rotatably mounted about the axis of rotation in an advantageous embodiment of the surface cleaning head according to the invention in the housing, each carrying a nozzle at a distance from the axis of rotation. As a result, at the same time a first liquid jet and a second liquid jet can be directed to the surface to be cleaned, which rotate around the axis of rotation and are arranged offset in the circumferential direction by 180 ° to each other. In such an embodiment, it is advantageous if the holding webs are not diametrically opposed to each other in pairs, as this ensures that not simultaneously meet both liquid jets on a holding web, but rather occurs when hitting the first liquid jet on a holding web of the second liquid jet unhindered through the liquid passage , It has been shown that thereby the noise can be kept low even with the use of two diametrically opposed spray arms.
Vorzugsweise kommt eine ungeradzahlige Anzahl von Haltestegen zum Einsatz, beispielsweise können drei, fünf, sieben oder neun Haltestege vorgese- hen sein, die in Umfangsrichtung ungleichmäßig verteilt angeordnet sind. Die Haltestege sind bevorzugt radial zur Drehachse der Sprüharme ausgerichtet. Preferably, an odd number of retaining webs is used, for example, three, five, seven or nine retaining webs can be provided, which are distributed unevenly in the circumferential direction. The holding webs are preferably aligned radially to the axis of rotation of the spray arms.
Die Schutzscheibe bildet bei einer vorteilhaften Ausführungsform der Erfindung einen zentralen Schutzschild aus, der unterhalb des mindestens einen Sprüharms angeordnet ist und der über die Haltestege mit einem den Schutzschild in Umfangsrichtung umgebenden Haltering verbunden ist. Es hat sich gezeigt, dass durch den Einsatz des Halteringes der zentrale Schutzschild vor allem in seinem an den Flüssigkeitsdurchlass angrenzenden äußeren Randbereich mechanisch stabilisiert werden kann. The protective disc forms in an advantageous embodiment of the invention, a central shield, which is arranged below the at least one spray arm and which is connected via the holding webs with a protective shield surrounding in the circumferential direction retaining ring. It has been shown that the use of the retaining ring makes it possible to mechanically stabilize the central protective shield, particularly in its outer edge region adjoining the fluid passage.
Um das Gewicht des Schutzschildes und damit die mechanische Belastung des Flächenreinigungskopfes gering zu halten, ist es von Vorteil, wenn der Schutzschild eine Vielzahl von Durchbrechungen aufweist. In order to keep the weight of the shield and thus the mechanical stress of the surface cleaning head low, it is advantageous if the shield has a plurality of openings.
Es kann beispielsweise vorgesehen sein, dass der Schutzschild gitter- oder netzartig ausgestaltet ist. It may be provided, for example, that the protective shield is configured in a grid or net shape.
Von besonderem Vorteil ist es, wenn der Schutzschild über die Haltestege einstückig mit dem Haltering verbunden ist. Der Schutzschild kann in Kombination mit den Haltestegen und dem Haltering ein einteiliges Kunststoffformteil ausbilden. It is particularly advantageous if the protective shield is integrally connected to the retaining ring via the retaining webs. The shield can form a one-piece plastic molding in combination with the retaining webs and the retaining ring.
Günstigerweise umfasst der Schutzschild mehrere Verstärkungsrippen, die den Schutzschild mechanisch stabilisieren. Bevorzugt sind zumindest einige der Verstärkungsrippen in radialer Richtung fluchtend zu einem Haltesteg angeordnet, über den der Schutzschild mit dem äußeren Haltering verbunden ist. Günstig ist es, wenn die Verstärkungsrippen oberseitig und/oder unterseitig vom Schutzschild abstehen. Dies erhöht die stabilisierende Wirkung der Verstärkungsrippen. Conveniently, the shield includes a plurality of reinforcing ribs that mechanically stabilize the shield. Preferably, at least some of the reinforcing ribs are arranged in the radial direction in alignment with a holding web, via which the protective shield is connected to the outer retaining ring. It is favorable if the reinforcing ribs protrude from the protective shield on the upper side and / or on the underside. This increases the stabilizing effect of the reinforcing ribs.
Besonders vorteilhaft ist es, wenn sich die Höhe der Verstärkungsrippen mit zunehmendem radialen Abstand zur Drehachse vergrößert oder verkleinert. Die Verstärkungsrippen erstrecken sich quer zum Schutzschild, wobei sich ihre Höhe in Abhängigkeit vom radialen Abstand zur Drehachse verändert. Insbesondere kann vorgesehen sein, dass sich die Höhe der Verstärkungsrippen mit zunehmendem Abstand zur Drehachse kontinuierlich vergrößert oder verklei- nert. It is particularly advantageous if the height of the reinforcing ribs increases or decreases with increasing radial distance from the axis of rotation. The reinforcing ribs extend transversely to the shield, wherein their height varies depending on the radial distance from the axis of rotation. In particular, it can be provided that the height of the reinforcing ribs continuously increases or decreases with increasing distance to the axis of rotation.
Als vorteilhaft hat es sich erwiesen, wenn die vom Schutzschild nach oben oder unten abstehenden Bereiche der Verstärkungsrippen bezogen auf eine Radialebene eine Dreiecksform ausbilden. It has proved to be advantageous if the regions of the reinforcing ribs projecting upwards or downwards from the protective shield form a triangular shape relative to a radial plane.
Es kann beispielsweise vorgesehen sein, dass sämtliche Verstärkungsrippen sowohl einen nach oben vom Schutzschild abstehenden Verstärkungsabschnitt als auch einen nach unten vom Schutzschild abstehenden Verstärkungsabschnitt aufweisen, wobei sich die Höhe von einem der beiden Verstärkungs- abschnitte, vorzugsweise die Höhe des oberen Verstärkungsabschnittes, mit zunehmendem radialen Abschnitt kontinuierlich in gleicher Weise verringert, wie sich die Höhe des anderen Verstärkungsabschnittes, vorzugsweise des unteren Verstärkungsabschnittes, mit zunehmendem radialen Abstand vergrößert. It can be provided, for example, that all reinforcing ribs both have a protruding upward from the shield reinforcing portion and a projecting downwardly from the shield reinforcing portion, wherein the height of one of the two reinforcing portions, preferably the height of the upper reinforcing portion, with increasing radial Section continuously reduced in the same way as the height of the other reinforcing section, preferably the lower reinforcing portion, increases with increasing radial distance.
Die Verstärkungsrippen bilden eine mechanische Verstärkung des Schutzschil- des. Letzteres ist vorzugsweise als Kunststoffformteil in einem Spritzgussvorgang hergestellt. Während des Spritzgussvorganges stellen die nach oben bzw. nach unten vom Schutzschild abstehenden Verstärkungsabschnitte Strömungskanäle dar, die sicherstellen, dass ausreichend Kunststoffmaterial bis zu den äußeren Randbereichen des Spritzwerkzeuges fließen kann. Die Verstär- kungsrippen weisen somit zusätzlich zu ihrer Verstärkungsfunktion auch eine spritzgusstechnische Funktion auf. The reinforcing ribs form a mechanical reinforcement of the protective shield. The latter is preferably produced as a plastic molded part in an injection molding process. During the injection molding process, the upwardly and downwardly projecting from the shield reinforcing portions flow channels, which ensure that sufficient plastic material can flow to the outer edge regions of the injection mold. The reinforcing ribs thus also have an injection molding function in addition to their reinforcing function.
Der Haltering kann am Gehäuse des Flächenreinigungskopfes angeordnet sein. Insbesondere kann vorgesehen sein, dass ein Randabschnitt des Gehäuses den Haltering ausbildet. The retaining ring can be arranged on the housing of the surface cleaning head. In particular, it can be provided that an edge portion of the housing forms the retaining ring.
Bei einer bevorzugten Ausführungsform ist der Haltering im Abstand zum Gehäuse angeordnet. Der Abstand des Halteringes zum Gehäuse in radialer Richtung ist bevorzugt geringer als die radiale Erstreckung des Flüssigkeits- durchlasses. In a preferred embodiment, the retaining ring is arranged at a distance from the housing. The distance of the retaining ring to the housing in the radial direction is preferably less than the radial extent of the liquid passage.
Von besonderem Vorteil ist es, wenn der Haltering in axialer Richtung bezogen auf die Drehachse des mindestens einen Sprüharms einen oberen Endbereich aufweist, der innerhalb des Gehäuses angeordnet ist, und einen unteren End- bereich, der über den unteren Rand des Gehäuses hervorragt. Der obere Endbereich des Halteringes ist somit in Umfangsrichtung vom Gehäuse umgeben. Dadurch kann das Gehäuse eine Führung für den Haltering ausbilden bei der Montage der Schutzscheibe, indem die Schutzscheibe, deren äußerer Randbereich vom Haltering gebildet wird, von unten in das Gehäuse eingesetzt wird. Der untere Endbereich des Halteringes kann aus dem Gehäuse in axialer Richtung hervorragen. Der Haltering kann dadurch einen Stoßschutz ausbil- den, der bei einer unbeabsichtigten Annäherung des Flächenreinigungskopfes an die zu reinigende Fläche das Gehäuse vor einer Beschädigung schützt, da bei einer derartigen Annäherung der Haltering mit seinem axial vorstehenden Bereich die zu reinigende Fläche berührt, noch bevor das Gehäuse auf die Fläche aufschlagen kann. It is particularly advantageous if the retaining ring in the axial direction with respect to the axis of rotation of the at least one spray arm has an upper end portion disposed within the housing and a lower end portion projecting beyond the lower edge of the housing. The upper end portion of the retaining ring is thus circumferentially surrounded by the housing. This allows the housing form a guide for the retaining ring in the Assembly of the protective disk by the protective disk, whose outer edge region is formed by the retaining ring, is inserted from below into the housing. The lower end portion of the retaining ring may protrude from the housing in the axial direction. The retaining ring can thereby form a shock protection, which protects the housing against damage when the surface cleaning head approaches the surface to be cleaned inadvertently, since with such an approach the retaining ring with its axially projecting area contacts the surface to be cleaned, even before the Housing can strike on the surface.
Besonders vorteilhaft ist es, wenn am unteren Rand des Gehäuses ein flexibles Spritzschutzelement angeordnet ist, das in axialer Richtung über den unteren Rand des Halterings hervorsteht. Als flexibles Spritzschutzelement kann beispielsweise eine Gummilippe oder ein Borstenring zum Einsatz kommen. Das flexible Spritzschutzelement umgibt somit den unteren Endbereich des Halterings in Umfangsrichtung, und beim Entlangführen des Flächenreinigungskopfes an der zu reinigenden Fläche kann das Spritzschutzelement die Fläche berühren, ohne dass dadurch der Haltering mit der Fläche in Kontakt gelangt. Günstigerweise ist die Materialstärke des Halterings geringer als dessen axiale Erstreckung. Der Haltering bildet somit eine Art Rohrstück oder Hülse aus. Die Hülse umgibt den zentralen Schutzschild der Schutzscheibe in Umfangsrichtung und bildet eine mechanische Stabilisierung. Die Schutzscheibe ist bei einer vorteilhaften Ausführungsform an einer Lagerwelle gehalten, an der der mindestens eine Sprüharm drehbar gelagert ist. Hierbei kann vorgesehen sein, dass die Schutzscheibe relativ zur Lagerwelle drehbar ist. Alternativ kann die Schutzscheibe drehfest im oder am Gehäuse festgelegt sein, beispielsweise an der Lagerwelle. It when at the bottom of the housing, a flexible splash guard is arranged, which protrudes in the axial direction over the lower edge of the retaining ring is particularly advantageous. As a flexible splash guard, for example, a rubber lip or a bristle ring can be used. Thus, the flexible splash guard surrounds the lower end portion of the retaining ring in the circumferential direction, and as the surface cleaning head passes along the surface to be cleaned, the splash guard may contact the surface without causing the retaining ring to contact the surface. Conveniently, the material thickness of the retaining ring is less than its axial extent. The retaining ring thus forms a kind of pipe section or sleeve. The sleeve surrounds the central shield of the protective disk in the circumferential direction and forms a mechanical stabilization. The protective disk is held in an advantageous embodiment of a bearing shaft on which the at least one spray arm is rotatably mounted. It can be provided that the protective disk relative to the bearing shaft is rotatable. Alternatively, the protective disk can be fixed in rotation in or on the housing, for example on the bearing shaft.
Es kann vorgesehen sein, dass der Flächenreinigungskopf lediglich Düsen auf- weist, die jeweils an einem um die Drehachse rotierenden Sprüharm gehalten sind. Diese können im Bereich des Flüssigkeitsdurchlasses der Schutzscheibe angeordnet sein, so dass die radial außen liegenden Enden der Haltestege einen größeren Abstand zur Drehachse aufweisen als die Düsen. Es kann allerdings auch vorgesehen sein, dass der Flächenreinigungskopf zusätzlich zu Düsen, die an einem drehbaren Sprüharm gehalten sind, mindestens eine weitere Düse umfasst, die radial versetzt zum Schutzschild angeordnet ist, also einen größeren radialen Abstand zur Drehachse aufweist als der Außenrand der Schutzscheibe. Die zusätzliche Düse kann drehfest im Gehäuse gehalten sein und beispielsweise zur Reinigung von Eckbereichen einer Fläche zum Einsatz kommen. It can be provided that the surface cleaning head has only nozzles, which are each held on a rotating about the axis of rotation spray arm. These can be arranged in the region of the liquid passage of the protective disk, so that the radially outer ends of the holding webs have a greater distance from the axis of rotation than the nozzles. However, it can also be provided that, in addition to nozzles, which are held on a rotatable spray arm, the surface cleaning head comprises at least one further nozzle, which is arranged radially offset from the shield, that is, a greater radial distance from the axis of rotation than the outer edge of the protective disk. The additional nozzle can be rotatably held in the housing and used, for example, for cleaning corner areas of a surface used.
Die nachfolgende Beschreibung bevorzugter Ausführungsformen der Erfindung dient im Zusammenhang mit der Zeichnung der näheren Erläuterung. Es zei- gen : The following description of preferred embodiments of the invention is used in conjunction with the drawings for further explanation. Show it :
Figur 1 : eine perspektivische Darstellung einer ersten Ausführungsform eines erfindungsgemäßen Flächenreinigungskopfes; Figur 2: eine Längsschnittansicht des Flächenreinigungskopfes aus Figur 1; Figur 3: eine Unteransicht des Flächenreinigungskopfes aus Figur 1; Figur 4: eine perspektivische Darstellung eines Schutzschildes des Flächenreinigungskopfes aus Figur 1 schräg von oben; Figur 5: eine perspektivische Darstellung des Schutzschildes aus Figur 4 schräg von unten; Figure 1: a perspective view of a first embodiment of a surface cleaning head according to the invention; Figure 2 is a longitudinal sectional view of the surface cleaning head of Figure 1; Figure 3 is a bottom view of the surface cleaning head of Figure 1; Figure 4 is a perspective view of a protective shield of the surface cleaning head of Figure 1 obliquely from above; Figure 5: a perspective view of the shield of Figure 4 obliquely from below;
Figur 6: eine perspektivische Darstellung einer zweiten Ausführungsform eines erfindungsgemäßen Flächenreinigungskopfes und 6 shows a perspective view of a second embodiment of a surface cleaning head according to the invention and
Figur 7: eine Längsschnittansicht des Flächenreinigungskopfes aus Figur 6. FIG. 7 shows a longitudinal sectional view of the surface cleaning head from FIG. 6.
In den Figuren 1 bis 5 ist eine erste Ausführungsform eines insgesamt mit dem Bezugszeichen 10 belegten erfindungsgemäßen Flächenreinigungskopfes dargestellt. Dieser umfasst ein haubenförmiges, nach unten offenes Gehäuse 12 mit einer in der Draufsicht kreisringförmigen, in sich geschlossenen Zylinderwand 14, die an ihrer Unterkante 15 einen umlaufenden flexiblen Spritzschutz in Form eines Borstenrings 17 trägt. Die Zylinderwand 14 wird von einer Deckenwand 19 überdeckt. Außenseitig ist an die Zylinderwand 14 ein in der Draufsicht im Wesentlichen V-förmiges Ansatzteil 21 angesetzt, an das sich oberhalb der Deckenwand 19 eine die Deckenwand 19 in einem zentralen Bereich abdeckende Abdeckung 22 anschließt. Seitlich neben der Abdeckung 22 sind oberhalb der Deckenwand 19 ein erster Handgriff 23 und ein zweiter Handgriff 24 angeordnet, die vom Benutzer umgriffen werden können zum Tragen des Flächenreinigungskopfes 10. Die Abdeckung 22 definiert oberhalb der Deckenwand 19 eine Verteilerkammer 26, und die Zylinderwand 14 umgibt unterhalb der Deckenwand 19 einen Sprühraum 28. Das Ansatzteil 21 definiert einen Zusatzraum 30. In der Verteilerkammer 26 ist ein zentrales Verteilerteil 32 angeordnet, in das ein Zufuhrrohr 34 einmündet, welches um eine quer zur Rohrlängsachse 35 ausgerichtete Schwenkachse 36 verschwenkbar im Verteilerteil 32 gelagert ist. An seinem dem Verteilerteil 32 abgewandten freien Ende trägt das Zufuhrrohr 34 ein Verbindungselement 38, so dass an das Zufuhrrohr 34 eine an sich bekannte und deshalb in der Zeichnung nicht dargestellte Druckleitung eines Hochdruckreinigungsgerätes angeschlossen werden kann. FIGS. 1 to 5 show a first embodiment of a surface cleaning head according to the invention, which is designated overall by the reference numeral 10. This includes a hood-shaped, downwardly open housing 12 with an annular in plan view, self-contained cylinder wall 14 which carries at its lower edge 15 a circumferential flexible splash guard in the form of a bristle ring 17. The cylinder wall 14 is covered by a ceiling wall 19. On the outside, a substantially V-shaped attachment part 21 is attached to the cylinder wall 14, to which a cover 22 covering the ceiling wall 19 in a central area adjoins above the ceiling wall 19. Laterally next to the cover 22 above the ceiling wall 19, a first handle 23 and a second handle 24 are arranged, which can be encompassed by the user for supporting the surface cleaning head 10th The cover 22 defines above the ceiling wall 19 a distribution chamber 26, and the cylinder wall 14 surrounds below the ceiling wall 19 a spray chamber 28. The attachment part 21 defines an additional space 30. In the distribution chamber 26, a central distributor part 32 is arranged, in which a supply pipe 34 opens , which is mounted about a transverse to the pipe axis 35 aligned pivot axis 36 pivotally mounted in the distributor part 32. At its free end remote from the distributor part 32, the supply pipe 34 carries a connecting element 38, so that a pressure line, which is known per se and therefore not shown in the drawing, of a high-pressure cleaning device can be connected to the supply pipe 34.
Das zentrale Verteilerteil 32 steht über eine erste Zuleitung 40 mit zwei einander diametral gegenüberliegenden Sprüharmen 42, 44 in Strömungsverbin- düng, die jeweils einen Strömungskanal 46 bzw. 48 aufweisen und an ihrem freien Ende eine Düse 50 bzw. 52 tragen. Die Strömungskanäle 46, 48 erstrecken sich durch die Sprüharme 42 bzw. 44 hindurch. In Figur 2 sind die Strömungskanäle 46, 48 nur teilweise dargestellt. Die Düsen 50, 52 sind über das Zufuhrrohr 34 und das Verteilerteil 32 sowie die sich an das Verteilerteil 32 anschließende erste Zuleitung 40 und die Strömungskanäle 46 bzw. 48 mit unter Druck stehender Reinigungsflüssigkeit beaufschlagbar und erzeugen einen schräg nach unten gerichteten Flüssigkeitsstrahl einer Reinigungsflüssigkeit. Beim Austritt aus den Düsen 50, 52 üben die Flüssigkeitsstrahlen durch Reaktionskräfte ein Drehmoment auf die Sprüharme 42, 44 aus und versetzen diese in Drehung um eine koaxial zur Längsachse der ersten Zuleitung 40 ausgerichtete Drehachse 54. Somit können mittels der umlaufenden Düsen 50, 52 ein erster Flüssigkeitsstrahl und ein zweiter Flüssigkeitsstrahl auf eine zu reinigende Fläche gerichtet werden. The central distributor part 32 is in flow connection via a first feed line 40 with two diametrically opposite spray arms 42, 44, which each have a flow channel 46 or 48 and carry a nozzle 50 or 52 at their free end. The flow channels 46, 48 extend through the spray arms 42 and 44, respectively. In Figure 2, the flow channels 46, 48 are shown only partially. The nozzles 50, 52 are acted upon by the supply pipe 34 and the distributor part 32 and the first supply line 40 and the flow channels 46 and 48 with pressurized cleaning liquid and produce an obliquely downwardly directed liquid jet of a cleaning liquid. Upon exiting the nozzles 50, 52, the liquid jets exert a torque on the spray arms 42, 44 by reaction forces and cause them to rotate about a rotation axis 54 aligned coaxially with the longitudinal axis of the first lead 40. Thus, by means of the orbiting Nozzles 50, 52 a first liquid jet and a second liquid jet are directed to a surface to be cleaned.
Ausgehend vom zentralen Verteilerteil 32 verläuft innerhalb der Verteilerkam- mer 26 eine zweite Zuleitung 56, die oberseitig in den Zusatzraum 30 eintaucht und an ihrem freien Ende eine Zusatzdüse 58 trägt. Die Zusatzdüse 58 ist in Form einer Sprühdüse ausgebildet und im Gegensatz zu den rotierenden Düsen 50, 52 ortsfest im Gehäuse 12 gehalten. Von der Zusatzdüse 58 kann unter Druck gesetzte Reinigungsflüssigkeit abgegeben werden beispielsweise zur Reinigung eines Eckbereiches einer zu reinigenden Fläche. Starting from the central distributor part 32, a second supply line 56 runs inside the distributor chamber 26 and dips into the additional space 30 on the upper side and carries an additional nozzle 58 at its free end. The additional nozzle 58 is designed in the form of a spray nozzle and held in the housing 12 in a fixed manner in contrast to the rotating nozzles 50, 52. From the additional nozzle 58, pressurized cleaning fluid can be dispensed, for example for cleaning a corner region of a surface to be cleaned.
Die Zuführung von Reinigungsflüssigkeit ausgehend vom Zufuhrrohr 34 über das Verteilerteil 32 erfolgt wahlweise entweder nur zu den jeweils an einem Sprüharm 52, 54 angeordneten Düsen 50, 52 oder zu der Zusatzdüse 58. Hierzu weist das Verteilerteil 32 eine in der Zeichnung nur schematisch dargestellte Umschalteinrichtung 60 aus, die in einer ersten Schaltstellung den Strömungsweg zwischen dem Zufuhrrohr 34 und der ersten Zuleitung 40 und in einer zweiten Schaltstellung den Strömungsweg zwischen dem Zufuhrrohr 34 und der zweiten Zuleitung 56 freigibt. The supply of cleaning liquid from the supply pipe 34 via the distributor part 32 is carried out selectively either only to each of a spray arm 52, 54 arranged nozzles 50, 52 or to the additional nozzle 58. For this purpose, the distributor part 32 has a switching device 60 shown only schematically in the drawing which in a first switching position releases the flow path between the supply pipe 34 and the first supply line 40 and in a second switching position the flow path between the supply pipe 34 and the second supply line 56.
Die beiden Sprüharme 42, 44 sind an einer Lagerwelle 62 drehbar gelagert, die an der ersten Zuleitung 40 gehalten ist und Strömungskanäle aufweist zur Herstellung der Strömungsverbindung zwischen der ersten Zuleitung 40 und den Strömungskanälen 46, 48 der beiden Sprüharme 42, 44. In axialer Rich- tung, das heißt in Richtung der Drehachse 54, steht die Lagerwelle 62 nach unten über die Sprüharme 42, 44 hervor. In ihrem hervorragenden Bereich trägt die Lagerwelle 62 ein Schutzelement in Form einer Schutzscheibe 64, deren konstruktiver Aufbau insbesondere aus den Figuren 4 und 5 deutlich wird. Die Schutzscheibe 64 umfasst ein zentrales, kreisförmiges Schutzschild 66, das gitterförmig ausgestaltet ist und eine Vielzahl von Durchbrechungen 68 aufweist. Es wird von radial verlaufenden Verstärkungsrippen 70 in mehrere Sektoren 71 bis 77 unterteilt, die sich in Umfangsrichtung jeweils über einen unterschiedlichen Winkelbereich erstrecken. The two spray arms 42, 44 are rotatably mounted on a bearing shaft 62 which is held on the first supply line 40 and flow channels for establishing the flow connection between the first supply line 40 and the flow channels 46, 48 of the two spray arms 42, 44. In the axial Rich - tion, that is, in the direction of the axis of rotation 54, the bearing shaft 62 protrudes downwards over the spray arms 42, 44. In its outstanding range, the bearing shaft 62 carries a protective element in the form of a protective screen 64, the constructive structure of which is clear in particular from FIGS. 4 and 5. The protective screen 64 comprises a central, circular shield 66, which is configured in the form of a lattice and has a multiplicity of perforations 68. It is divided by radially extending reinforcing ribs 70 into a plurality of sectors 71 to 77, each extending over a different angular range in the circumferential direction.
Die Verstärkungsrippen 70 weisen jeweils einen oberseitigen Verstärkungsabschnitt 70a und einen unterseitigen Verstärkungsabschnitt 70b aus. Der oberseitige Verstärkungsabschnitt 70a steht oberseitig aus dem Schutzschild 66 hervor, ist also senkrecht zu diesem ausgerichtet, wobei sich seine Höhe mit zunehmendem Abstand zur Drehachse 54 verringert. In einer Radialebene bildet der oberseitige Verstärkungsabschnitt eine Dreiecksform aus. Der unterseitige Verstärkungsabschnitt 70b steht unterseitig aus dem Schutzschild 66 hervor und ist ebenfalls senkrecht zu diesem ausgerichtet. Mit zunehmendem Abstand zur Drehachse 54 erhöht sich die Höhe des unterseitigen Verstärkungsabschnitts in gleicher Weise, wie sich die Höhe des oberseitigen Verstärkungsabschnitts 70a verringert. In einer Radialebene definiert auch der unterseitige Verstärkungsabschnitt 70b eine Dreiecksform. Die Verstärkungsrippen 70 bilden mit ihren oberseitigen und unterseitigen Verstärkungsabschnitten 70a und 70b eine mechanische Verstärkung des Schutzschildes 66. Letzteres ist durch einen Spritzgussvorgang aus einem Kunststoffmaterial hergestellt. Während des Spritzgussvorganges stellen die Verstärkungsabschnitte für das flüssige Kunststoffmaterial Strömungskanäle dar, die sicherstellen, dass aus- reichend Kunststoffmaterial bis zu den äußeren Randbereichen des Spritzwerkzeuges fließen kann. In Umfangsrichtung ist der zentrale Schutzschild 66 von einem Haltering 78 umgeben, der über fluchtend zu den Verstärkungsrippen 70 angeordnete Haltestege 80 einstückig mit dem Schutzschild 66 verbunden ist. Zwischen dem Haltering 78 und dem äußeren Rand des Schutzschildes 66 erstreckt sich ein ringförmiger Flüssigkeitsdurchlass 82, der von den Haltestegen 80 durchgriffen ist. The reinforcing ribs 70 each have an upper-side reinforcing portion 70a and a lower-side reinforcing portion 70b. The upper-side reinforcing section 70a protrudes from the protective shield 66 on the upper side, that is to say it is oriented perpendicular to it, its height being reduced with increasing distance from the axis of rotation 54. In a radial plane, the upper-side reinforcing section forms a triangular shape. The lower-side reinforcing portion 70b protrudes from the shield 66 on the lower side and is also aligned perpendicular thereto. As the distance from the rotation axis 54 increases, the height of the lower-side reinforcing portion increases in the same manner as the height of the upper-side reinforcing portion 70a decreases. In a radial plane, the lower-side reinforcing section 70b also defines a triangular shape. The reinforcing ribs 70 form a mechanical reinforcement of the protective shield 66 with their top and bottom reinforcing portions 70a and 70b. The latter is made of a plastic material by an injection molding process. During the injection molding process, the reinforcing sections for the liquid plastic material constitute flow channels which ensure that sufficient plastic material can flow to the outer edge regions of the injection molding tool. In the circumferential direction of the central shield 66 is surrounded by a retaining ring 78 which is integrally connected via aligned with the reinforcing ribs 70 retaining webs 80 with the shield 66. Between the retaining ring 78 and the outer edge of the shield 66, an annular fluid passage 82 extends, which is penetrated by the retaining webs 80.
Der Haltering 78 ist nach Art eines sehr kurzen Rohrstückes oder nach Art einer Hülse ausgestaltet, indem seine Materialstärke beträchtlich geringer ist als seine Erstreckung in axialer Richtung bezogen auf die Drehachse 54 der Sprüharme 42, 44. Ein axialer oberer Endbereich 84 des Halteringes 78 ist innerhalb des Gehäuses 12 angeordnet, indem er vom freien Endbereich der Zylinderwand 14 in Umfangsrichtung umgeben ist, wohingegen ein axialer unterer Endbereich 86 über die Unterkante 15 der Zylinderwand 14 und damit über das Gehäuse 12 nach unten hervorragt. Der untere Endbereich 86 ist aber in Umfangsrichtung von dem flexiblen Spritzschutz, nämlich vom The retaining ring 78 is designed in the manner of a very short piece of pipe or in the manner of a sleeve by its material thickness is considerably less than its extension in the axial direction with respect to the axis of rotation 54 of the spray arms 42, 44. An axial upper end portion 84 of the retaining ring 78 is within of the housing 12 is arranged by being circumferentially surrounded by the free end portion of the cylinder wall 14, whereas an axial lower end portion 86 projects downwardly beyond the lower edge 15 of the cylinder wall 14 and thus over the housing 12. However, the lower end portion 86 is in the circumferential direction of the flexible splash guard, namely from
Borstenring 17 umgeben, der seinerseits in axialer Richtung nach unten über den unteren Endbereich 86 des Halteringes 78 hervorsteht. Dies wird insbesondere aus Figur 2 deutlich. Surrounding bristle ring 17, which in turn protrudes in the axial direction down over the lower end portion 86 of the retaining ring 78. This becomes clear in particular from FIG.
Bei der Montage des Flächenreinigungskopfes 10 kann die Schutzscheibe 64 von unten in das Gehäuse 12 eingesetzt werden. Hierbei bildet der untere Endbereich der Zylinderwand 14 eine Führung für die Schutzscheibe 64 aus. Nach Montage der Schutzscheibe 64 an der Lagerwelle 62 ist der ringförmige Flüssigkeitsdurchlass 82 fluchtend zu den Düsen 50 und 52 angeordnet, so dass die von den Düsen 50, 52 ausgehenden Flüssigkeitsstrahlen durch den Flüssigkeitsdurchlass 82 hindurchtreten können, um die zu reinigende Fläche zu beaufschlagen. When mounting the surface cleaning head 10, the protective plate 64 can be inserted from below into the housing 12. In this case, the lower end region of the cylinder wall 14 forms a guide for the protective disk 64. After mounting the protective disk 64 on the bearing shaft 62, the annular fluid passage 82 is arranged in alignment with the nozzles 50 and 52, so that the liquid jets emanating from the nozzles 50, 52 through the Liquid passage 82 can pass to act on the surface to be cleaned.
Wie bereits erläutert, rotieren die Düsen 50, 52 um die Drehachse 54, wenn sie mit unter Druck stehender Flüssigkeit beaufschlagt werden. Sie geben jeweils einen Flüssigkeitsstrahl ab. Während der Umlaufs der Düsen 50, 52 um die Drehachse 54 trifft der jeweilige Flüssigkeitsstrahl in zeitlich unregelmäßigen Abständen auf einen Haltesteg 80, wobei jedoch sichergestellt ist, dass nicht gleichzeitig zwei Haltestege von den beiden Flüssigkeitsstrahlen beauf- schlagt werden können, die von den Düsen 50, 52 ausgehen. Dies wird dadurch gewährleistet, dass die Haltestege 80 nicht paarweise diametral zueinander ausgerichtet sind, wie dies bei den beiden Sprüharmen 42, 44 der Fall ist. In dem Moment, in dem ein erster Flüssigkeitsstrahl auf einen Haltesteg 80 trifft, kann der zweite Flüssigkeitsstrahl den Flüssigkeitsdurchlass 82 ungehindert passieren. As already explained, the nozzles 50, 52 rotate about the axis of rotation 54 when they are subjected to pressurized liquid. They each release a liquid jet. During the circulation of the nozzles 50, 52 about the axis of rotation 54, the respective liquid jet impinges on a holding web 80 at irregular intervals, but it is ensured that two holding webs can not be acted upon simultaneously by the two liquid streams coming from the nozzles 50 , 52 go out. This is ensured by the fact that the holding webs 80 are not aligned in pairs diametrically opposite each other, as is the case with the two spray arms 42, 44. At the moment when a first liquid jet strikes a holding web 80, the second liquid jet can pass through the liquid passage 82 unhindered.
Da die Haltestege 80 in Umfangsrichtung ungleichmäßig verteilt sind, kann die Schutzscheibe 64 von den umlaufenden Flüssigkeitsstrahlen nicht in eine reso- nante Schwingung versetzt werden, da die Haltestege 80 in ungleichmäßigen zeitlichen Abständen von einem Flüssigkeitsstrahl beaufschlagt werden. Diese ungleichmäßige Anordnung der Haltestege stellt sicher, dass die Geräuschentwicklung des Flächenreinigungskopfes 10 gering gehalten werden kann. Since the holding webs 80 are distributed unevenly in the circumferential direction, the protective disk 64 can not be put into resonant oscillation by the circulating liquid jets, since the holding webs 80 are acted on at irregular intervals by a liquid jet. This uneven arrangement of the holding webs ensures that the noise of the surface cleaning head 10 can be kept low.
Eine zweite erfindungsgemäße Ausgestaltung eines erfindungsgemäßen Flä- chenreinigungskopfes ist in den Figuren 6 und 7 dargestellt und insgesamt mit dem Bezugszeichen 90 belegt. Der Flächenreinigungskopf 90 ist weitgehend identisch ausgestaltet wie der voranstehend unter Bezugnahme auf die Figu- ren 1 bis 5 erläuterte Flächenreinigungskopf 10. Für identische Bauteile werden daher in den Figuren 6 und 7 dieselben Bezugszeichen verwendet wie in den Figuren 1 bis 5 und zur Vermeidungen von Wiederholungen wird bezüglich dieser Bauteile auf die voranstehenden Erläuterungen Bezug genommen. A second embodiment according to the invention of a surface cleaning head according to the invention is shown in FIGS. 6 and 7 and is generally designated by the reference numeral 90. The surface cleaning head 90 is configured substantially identical to the one described above with reference to FIGS. For identical components, therefore, the same reference numerals are used in Figures 6 and 7 as in Figures 1 to 5 and to avoid repetition, reference is made to the above explanations with respect to these components.
Der in den Figuren 6 und 7 dargestellte Flächenreinigungskopf 90 unterscheidet sich vom voranstehend erläuterten Flächenreinigungskopf 10 dadurch, dass er lediglich die beiden Düsen 50, 52 aufweist, die jeweils am freien Ende eines Sprüharms 42 bzw. 44 gehalten sind und bei Beaufschlagung mit unter Druck stehender Reinigungsflüssigkeit um die Drehachse 54 rotieren. Eine drehfeste Zusatzdüse kommt beim Flächenreinigungskopf 90 nicht zum Einsatz. The surface cleaning head 90 shown in Figures 6 and 7 differs from the above-described surface cleaning head 10 in that it has only the two nozzles 50, 52, which are respectively held at the free end of a spray arm 42 and 44 and when pressurized Rotate cleaning fluid about the axis of rotation 54. A non-rotatable additional nozzle is not used in the surface cleaning head 90.
Der Flächenreinigungskopf 90 weist ebenfalls eine Schutzscheibe 64 auf, wie sie voranstehend unter Bezugnahme auf Figur 4 erläutert wurde. Die Schutzscheibe 64 hat einen zentralen Schutzschild 66, der in Umfangsrichtung von einem Haltering 78 umgeben ist, wobei zwischen dem Schutzschild 66 und dem Haltering 78 ein Flüssigkeitsdurchlass 82 angeordnet ist, der von Haltestegen 80 durchgriffen ist, wobei die Haltestege 80 auch beim Flächenreini- gungskopf 90 in Umfangsrichtung ungleichmäßig verteilt angeordnet sind. Die ungleichmäßige Anordnung der Haltestege 80 stellt auch beim Flächenreinigungskopf 90 sicher, dass die Geräuschentwicklung bei Beaufschlagung mit unter Druck stehender Reinigungsflüssigkeit verhältnismäßig gering gehalten werden kann, da sich eine resonante Schwingung der Schutzscheibe 64 durch die in zeitlich unregelmäßiger Reihenfolge auf die Haltestege 80 auftreffenden Flüssigkeitsstrahlen nicht ausbilden kann. The surface cleaning head 90 also has a protective disk 64, as has been explained above with reference to FIG. The protective disk 64 has a central shield 66, which is surrounded in the circumferential direction by a retaining ring 78, wherein between the shield 66 and the retaining ring 78, a fluid passage 82 is arranged, which is penetrated by retaining webs 80, wherein the retaining webs 80 also head in the surface cleaning 90 are distributed unevenly in the circumferential direction. The uneven arrangement of the holding webs 80 also ensures the surface cleaning head 90 that the noise when exposed to pressurized cleaning fluid can be kept relatively low, since a resonant vibration of the protective plate 64 by the impinging in time irregular order on the holding webs 80 liquid jets not can train.

Claims

PATENTANSPRÜCHE
1. Flächenreinigungskopf (10; 90) zur Reinigung einer Fläche, mit einem haubenförmigen, nach unten offenen Gehäuse (12), in dem zumindest ein Sprüharm (42, 44) um eine Drehachse (54) drehbar gelagert ist, wobei der mindestens eine Sprüharm (42, 44) im Abstand zur Drehachse (54) eine Düse (50, 52) trägt, die mit unter Druck stehender Reinigungsflüssigkeit beaufschlagbar ist und zusammen mit dem Sprüharm (42, 44) um die Drehachse (54) umläuft zur Beaufschlagung der zu reinigenden Fläche mit einem Flüssigkeitsstrahl, und mit einer Schutzscheibe (64), die den mindestens einen Sprüharm (42, 44) zur offenen Unterseite des Gehäuses (12) abdeckt und einen ringförmigen, von Haltestegen (80) durchgriffenen Flüssigkeitsdurchlass (82) definiert zum Hindurchtreten des Flüssigkeitsstrahls, wobei der mindestens eine Sprüharm (42, 44) relativ zur Schutzscheibe (64) verdrehbar ist, dadurch gekennzeichnet, dass die Haltestege (80) in Umfangsrichtung ungleichmäßig verteilt angeordnet sind. A surface cleaning head (10; 90) for cleaning a surface, with a hood-shaped, downwardly open housing (12) in which at least one spray arm (42, 44) is rotatably mounted about an axis of rotation (54), wherein the at least one spray arm (42, 44) at a distance from the axis of rotation (54) carries a nozzle (50, 52) which is acted upon by pressurized cleaning liquid and together with the spray arm (42, 44) about the axis of rotation (54) rotates to act on the cleaning surface with a liquid jet, and with a protective disk (64) covering the at least one spray arm (42, 44) to the open bottom of the housing (12) and defines an annular, by retaining webs (80) through-penetrated liquid passage (82) defined for passing through the liquid jet, wherein the at least one spray arm (42, 44) relative to the protective disk (64) is rotatable, characterized in that the holding webs (80) arranged distributed unevenly in the circumferential direction are.
2. Flächenreinigungskopf nach Anspruch 1, dadurch gekennzeichnet, dass im Gehäuse (12) zwei einander diametral gegenüberliegende Sprüharme (42, 44) um die Drehachse (54) drehbar gelagert sind, die im Abstand zur Drehachse (54) jeweils eine Düse (50, 52) tragen, und dass die Haltestege (80) einander nicht paarweise diametral gegenüberliegen. 2. surface cleaning head according to claim 1, characterized in that in the housing (12) has two diametrically opposed spray arms (42, 44) about the axis of rotation (54) are rotatably mounted at a distance from the axis of rotation (54) each have a nozzle (50, 52), and that the retaining webs (80) are not diametrically opposed to each other in pairs.
3. Flächenreinigungskopf nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Schutzscheibe (64) einen zentralen Schutzschild (66) ausbildet, der unterhalb des mindestens einen Sprüharms (42, 44) angeordnet ist und der über die Haltestege (80) mit einem den Schutzschild (66) in Umfangsrichtung umgebenden Haltering (78) verbunden ist. 3. surface cleaning head according to claim 1 or 2, characterized in that the protective disc (64) forms a central shield (66), which is arranged below the at least one spray arm (42, 44) and which is connected via the retaining webs (80) with a retaining ring (78) surrounding the protective shield (66) in the circumferential direction.
4. Flächenreinigungskopf nach Anspruch 3, dadurch gekennzeichnet, dass der Schutzschild (66) eine Vielzahl von Durchbrechungen (68) aufweist. 4. surface cleaning head according to claim 3, characterized in that the protective shield (66) has a plurality of openings (68).
5. Flächenreinigungskopf nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass der Schutzschild (66) gitter- oder netzartig ausgestaltet ist. 5. surface cleaning head according to claim 3 or 4, characterized in that the protective shield (66) is designed grid or net-like.
6. Flächenreinigungskopf nach Anspruch 3, 4 oder 5, dadurch gekennzeichnet, dass der Schutzschild (66) über die Haltestege (80) einstückig mit dem Haltering (78) verbunden ist. 6. surface cleaning head according to claim 3, 4 or 5, characterized in that the protective shield (66) via the retaining webs (80) is integrally connected to the retaining ring (78).
7. Flächenreinigungskopf nach einem der Ansprüche 3 bis 6, dadurch 7. surface cleaning head according to one of claims 3 to 6, characterized
gekennzeichnet, dass die Schutzscheibe (64) oberseitig und/oder unterseitig vom Schutzschild (66) abstehende Verstärkungsrippen (70) aufweist, die in radialer Richtung fluchtend zu den Haltestegen (80) ausgerichtet sind.  in that the protective pane (64) has reinforcing ribs (70) projecting from the protective shield (66) on the upper side and / or underside and aligned in the radial direction in alignment with the retaining bars (80).
8. Flächenreinigungskopf nach Anspruch 7, dadurch gekennzeichnet, dass sich die Höhe der Verstärkungsrippen (70) mit zunehmendem radialen Abstand zur Drehachse (54) vergrößert oder verkleinert. 8. surface cleaning head according to claim 7, characterized in that the height of the reinforcing ribs (70) with increasing radial distance from the axis of rotation (54) increases or decreases.
9. Flächenreinigungskopf nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass die vom Schutzschild (66) nach oben oder unten abstehenden Bereiche (70a, 70b) der Verstärkungsrippen (70) bezogen auf eine Radialebene eine Dreiecksform ausbilden. 9. surface cleaning head according to claim 7 or 8, characterized in that the protective shield (66) projecting upwards or downwards Regions (70a, 70b) of the reinforcing ribs (70) with respect to a radial plane forming a triangular shape.
10. Flächenreinigungskopf nach einem der Ansprüche 3 bis 9, dadurch 10. surface cleaning head according to one of claims 3 to 9, characterized
gekennzeichnet, dass der Haltering (78) im Abstand zum Gehäuse (12) angeordnet ist.  in that the retaining ring (78) is arranged at a distance from the housing (12).
11. Flächenreinigungskopf nach einem der Ansprüche 3 bis 9, dadurch 11. Surface cleaning head according to one of claims 3 to 9, characterized
gekennzeichnet, dass der Haltering (78) in axialer Richtung bezogen auf die Drehachse (54) des mindestens einen Sprüharms (42, 44) einen oberen Endbereich (84) aufweist, der innerhalb des Gehäuses (12) angeordnet ist, und einen unteren Endbereich (86), der über den unteren Rand (15) des Gehäuses (12) hervorragt.  characterized in that the retaining ring (78) has in the axial direction with respect to the axis of rotation (54) of the at least one spray arm (42, 44) an upper end region (84) which is arranged inside the housing (12) and a lower end region ( 86) projecting beyond the lower edge (15) of the housing (12).
12. Flächenreinigungskopf nach Anspruch 11, dadurch gekennzeichnet, dass am unteren Rand (15) des Gehäuses (12) ein flexibles Spritzschutzelement (17) angeordnet ist, das in axialer Richtung über den unteren Endbereich (86) des Halterings (78) hervorragt. 12. surface cleaning head according to claim 11, characterized in that at the lower edge (15) of the housing (12) a flexible splash guard (17) is arranged, which protrudes in the axial direction over the lower end portion (86) of the retaining ring (78).
13. Flächenreinigungskopf nach einem der Ansprüche 3 bis 12, dadurch 13. surface cleaning head according to one of claims 3 to 12, characterized
gekennzeichnet, dass die Material stärke des Halterings (78) geringer ist als dessen axiale Erstreckung.  in that the material thickness of the retaining ring (78) is less than its axial extent.
14. Flächenreinigungskopf nach einem der voranstehenden Ansprüche, 14. Surface cleaning head according to one of the preceding claims,
dadurch gekennzeichnet, dass die Schutzscheibe (64) an einer Lagerwelle (62) gehalten ist, an der der mindestens eine Sprüharm (42, 44) drehbar gelagert ist.  characterized in that the protective disc (64) is held on a bearing shaft (62) on which the at least one spray arm (42, 44) is rotatably mounted.
EP09781919.7A 2009-08-17 2009-08-17 Surface cleaning head Not-in-force EP2467214B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09781919T PL2467214T3 (en) 2009-08-17 2009-08-17 Surface cleaning head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2009/060633 WO2011020492A1 (en) 2009-08-17 2009-08-17 Surface-cleaning head

Publications (2)

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EP2467214A1 true EP2467214A1 (en) 2012-06-27
EP2467214B1 EP2467214B1 (en) 2013-05-08

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ID=42173903

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US (1) US9027579B2 (en)
EP (1) EP2467214B1 (en)
JP (1) JP5336661B2 (en)
CN (1) CN102470401B (en)
BR (1) BR112012003594A2 (en)
DK (1) DK2467214T3 (en)
PL (1) PL2467214T3 (en)
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WO2020030273A1 (en) 2018-08-09 2020-02-13 Alfred Kärcher SE & Co. KG Surface-cleaning head

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RU2503510C2 (en) 2014-01-10
JP5336661B2 (en) 2013-11-06
DK2467214T3 (en) 2013-07-22
PL2467214T3 (en) 2013-09-30
JP2013502305A (en) 2013-01-24
EP2467214B1 (en) 2013-05-08
RU2012110124A (en) 2013-09-27
US9027579B2 (en) 2015-05-12
US20130019911A1 (en) 2013-01-24
BR112012003594A2 (en) 2016-03-15
WO2011020492A1 (en) 2011-02-24
CN102470401A (en) 2012-05-23
CN102470401B (en) 2014-02-12

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