EP3925508B1 - Serpillière - Google Patents

Serpillière Download PDF

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Publication number
EP3925508B1
EP3925508B1 EP20180101.6A EP20180101A EP3925508B1 EP 3925508 B1 EP3925508 B1 EP 3925508B1 EP 20180101 A EP20180101 A EP 20180101A EP 3925508 B1 EP3925508 B1 EP 3925508B1
Authority
EP
European Patent Office
Prior art keywords
housing
wiping
tank
mop
collection chamber
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.)
Active
Application number
EP20180101.6A
Other languages
German (de)
English (en)
Other versions
EP3925508A1 (fr
Inventor
Burak Nayir
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP20180101.6A priority Critical patent/EP3925508B1/fr
Priority to US17/347,167 priority patent/US11673167B2/en
Publication of EP3925508A1 publication Critical patent/EP3925508A1/fr
Application granted granted Critical
Publication of EP3925508B1 publication Critical patent/EP3925508B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
    • B08B1/14—Wipes; Absorbent members, e.g. swabs or sponges
    • B08B1/143—Wipes
    • 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
    • A47L13/00—Implements for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L13/10—Scrubbing; Scouring; Cleaning; Polishing
    • A47L13/16—Cloths; Pads; Sponges
    • A47L13/17—Cloths; Pads; Sponges containing cleaning agents
    • 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
    • A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4013—Contaminants collecting devices, i.e. hoppers, tanks or the like
    • A47L11/4016—Contaminants collecting devices, i.e. hoppers, tanks or the like specially adapted for collecting fluids
    • 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
    • A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4036—Parts or details of the surface treating tools
    • A47L11/4047—Wound-up or endless cleaning belts
    • 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
    • A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/408—Means for supplying cleaning or surface treating agents
    • A47L11/4083—Liquid supply reservoirs; Preparation of the agents, e.g. mixing devices
    • 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
    • A47L13/00—Implements for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L13/10—Scrubbing; Scouring; Cleaning; Polishing
    • A47L13/16—Cloths; Pads; Sponges
    • 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
    • A47L13/00—Implements for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L13/10—Scrubbing; Scouring; Cleaning; Polishing
    • A47L13/20—Mops
    • A47L13/22—Mops with liquid-feeding devices
    • 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
    • A47L13/00—Implements for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L13/10—Scrubbing; Scouring; Cleaning; Polishing
    • A47L13/26—Other cleaning devices with liquid supply arrangements
    • 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
    • A47L13/00—Implements for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L13/10—Scrubbing; Scouring; Cleaning; Polishing
    • A47L13/50—Auxiliary implements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
    • B08B1/32—Cleaning by methods involving the use of tools by movement of cleaning members over a surface using rotary cleaning members
    • 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
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
    • B08B3/14—Removing waste, e.g. labels, from cleaning liquid; Regenerating cleaning liquids
    • 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
    • A47L2601/00—Washing methods characterised by the use of a particular treatment
    • A47L2601/20—Other treatments, e.g. dry cleaning

Definitions

  • the present invention relates to a mop.
  • the wiping element When using a mop, dirt particles from a surface to be cleaned, such as tiles, parquet, linoleum, etc., are picked up by a wiping element.
  • the wiping element preferably comprises a robust, soft and thick material (e.g. a fleece, a foam, a sponge or a microfiber cloth). As the wiping element is used, this material becomes dirty as dirt particles picked up from the surface to be cleaned settle on and in it.
  • the US 3 052 905 A a device for scrubbing horizontal surfaces is known, which comprises a frame with side plates, a base plate, a front plate, a rear wall and an upper plate inclined upwards and backwards, and a tank open at the top which is supported between the side plates and the rear wall and adjoins the rear wall, wherein the upper plate begins at the front plate and ends at the open top of the tank, and which further comprises a motor carried by the base plate in front of the tank, and a transverse drive roller extending parallel to the rear plate and located above the intersection of the tank and the upper plate.
  • the aim of the present invention is to provide an alternative design for a mop which has a compact structure and in which a wiping element can be reliably cleaned of dirt particles during use of the mop without having to be replaced.
  • Fig.1 shows a schematic section through a mop according to the invention.
  • the mop 10 comprises a housing 20.
  • An anchoring mechanism 11 for receiving a handle 12 is attached to the top 23 of the housing 20.
  • the handle 12 serves to guide the mop 10 over a surface to be cleaned.
  • This wiping belt 30 can consist of nonwoven materials or other materials particularly suitable for absorbing dirt particles.
  • the housing 20 of the mop 10 comprises a bottom side 21, a first side wall 22 extending approximately vertically upwards from the bottom side 21, an upper side 23 extending approximately horizontally and parallel to the bottom side 21, and a second side wall 24 extending approximately vertically downwards from the upper side 23 to the bottom side 21.
  • An entry slot 40 for the wiping tape 30 is provided on the upper side 23 of the housing 23.
  • housing 20 there are several cavities separated from each other by partition walls but connected to each other by passages. As explained below, these serve to collect dirt particles, to collect wiping fluids or as passages for the wiping belt 30 guided through the housing 20.
  • a mechanical dirt separator (scraper pins 44), a coarse particle collection chamber 50, a first (upper) tank 70 which is mounted approximately next to the coarse particle collection chamber 50 and is to be filled with wiping fluid, and a second (lower) tank 80 which is mounted below the inlet slot 40, the coarse particle collection chamber 50 and the first tank 70.
  • the second tank 80 must also be filled with wiping fluid.
  • the same wiping fluid can be filled into both tanks 70, 80. In the simplest case, this is water, with or without the addition of a cleaning agent concentrate.
  • the concentration of the cleaning agent added can be the same or different in both tanks 70, 80, or different cleaning agents can be used in the two tanks 70, 80.
  • Passages are provided inside the housing to guide the wiping belt 30 through the housing 20. Furthermore, several deflection elements are attached to or in the housing 20, such as deflection rollers 100, 101, which serve to deflect the wiping belt 30 to be guided through the interior of the housing 20.
  • the mop 10 functions as follows:
  • the wiping belt 30, which is designed as a self-contained “endless belt”, is guided around the underside 21 of the housing, from there along the first side wall 22 and along a section of the top side 23 to the inlet slot 40, from there through the lower tank 80 and the upper tank 70, from there through an outlet slot 95 out of the interior of the housing 20, around a deflection element 101 along the second side wall 24 and from there back to the underside of the housing 21.
  • the part of the wiping belt 30 which is in Fig.1 facing away from the underside 21 of the housing 20 is referred to as the outer side (cleaning side) 31 of the wiping belt 30 and is the side which, when the mop 30 is used, is guided over a surface to be cleaned and comes into direct contact with dirt particles and detaches or strips them from the surface to be cleaned.
  • the wiping belt 30 After the wiping process has been completed, a part of the wiping belt 30 that was originally in contact with the underside 21 of the housing is guided through the entry slot 40 into the interior of the housing 20.
  • the wiping belt can be driven forward, for example, by manually rotating a drive wheel 200 connected to the deflection roller 101.
  • servomotors can also be provided together with control electronics and operating elements that ensure the desired drive of the wiping belt 30.
  • the inlet slot 40 is formed by a first cheek 42 and a second cheek 43, which are opposite each other.
  • the distance between the two cheeks 42, 43 is dimensioned such that the cheeks rest relatively tightly against the inner side 32 and the outer side 31 of the wiping belt 30 guided through them, but at the same time still allow it to slide through the two cheeks 42, 43.
  • the first cheek 42 at the inlet slot 40 in the housing 20 is provided with stripping pins 44 and with through openings 45 which lead from the inlet chamber 40 to a coarse particle collection chamber 50.
  • the stripping pins 44 come into close contact with the outside 31 of the wiping belt 30 and act like a rake or a comb which, when the wiping belt 30 is moved through the two cheeks 42, 43, strips loose coarse dirt particles from the cleaning side 31 of the wiping belt 30 which have been picked up by the cleaning side 31 when wiping over a surface to be cleaned and which adhere to it.
  • the stripping pins 44 in the first cheek 42 are the through openings 45 through which the dirt particles stripped by the stripping pins 44 from the cleaning side 31 of the wiping belt 30 can reach the coarse particle collection chamber 50. Due to the interaction of the stripping pins 44 and through openings 45, the two cheeks 42, 43 of the inlet slot 40 act as dirt separators for coarse particles.
  • the coarse particle collection chamber 50 is provided with a flap or other suitable opening device (not shown) and can preferably be temporarily removed in its entirety from the housing 20. This enables access to the interior of the coarse particle collection chamber 50 and the dirt particles that accumulate inside it over time during use of the mop according to the invention can be removed from it and the coarse particle collection chamber 50 can thus be emptied and cleaned again.
  • the lower ends of the first and second cheeks 42, 43 form a passage for the wiping belt 30 into the lower tank 80.
  • This lower tank 80 is also to be filled with a wiping fluid.
  • the wiping belt 30 is guided from the lower end of the cheeks 43, 44 to a deflection element 100 located essentially at the bottom of the lower tank 80, from where it is then guided back up in the lower tank 80 to a passage slot 90 between the lower tank 80 and the upper tank 70 above it.
  • This deflection element 100 can be a freely rotatable roller.
  • the deflection element 100 can also be a rigid, essentially circular cylinder section over which the wiping belt 30 slides.
  • this deflection element 100 can be provided with a roughened surface on which further dirt particles are stripped from the surface of the wiping belt 30 to remain in the lower tank 80.
  • the wiping belt 30 in the lower tank 80 is first guided diagonally downwards and then diagonally upwards again, it travels a relatively long path in the wiping fluid in the lower tank 80.
  • the wiping fluid in the lower tank 80 can thereby have an extensive effect on the dirt still in the wiping belt 30 after the rough cleaning in the dirt separator explained above and can loosen it from the wiping belt 30.
  • the wiping belt 30 When the wiping belt 30 exits the lower tank 80, it enters the upper tank 70 located above the lower tank 80 through closely fitting cheeks 91, 92 of a passage slot 90.
  • the distance between the cheeks 91, 92 of this passage slot 90 is dimensioned such that the material of the wiping belt 30 is slightly compressed as it slides through the gap of the passage slot formed between the cheeks 91, 92.
  • the wiping fluid absorbed by the wiping belt 30 in the lower tank 80 is essentially pressed out of the wiping belt 30 and remains in the lower tank 80.
  • the dimensions of the passage slot 90 between the cheeks 91, 92 at the transition from the lower tank 80 to the upper tank 70 and the dimensions of the wiping belt 30 in the transverse and longitudinal directions of the first passage slot 90 are selected such that the wiping belt 30 guided through between the cheeks 91, 92 seals the interior of the upper tank 70 located above the lower tank 80 from the interior of the lower tank 80.
  • the wiping fluid located in the lower second tank 80 and the wiping fluid located in the upper tank 70 practically do not mix with one another.
  • the wiping belt 30 in the upper tank 70 absorbs the relatively clean second wiping liquid contained therein.
  • the upper tank 70 thus serves as a reservoir for a relatively clean second wiping liquid, even after prolonged use of the wiping mop according to the invention, with which the wiping belt 30 is wetted or saturated when it exits the housing 20.
  • Both the first and the second tank 70, 80 have closable drain or filling openings (not shown) through which the liquids generated during use by Wiper fluids contaminated by dirt particles can be drained and fresh, uncontaminated wiper fluids can be added.
  • cheeks 96, 97 can again be two rigid cheeks 96, 97, similar to the cheeks 91, 92 provided in the passage slot 90 between the lower tank 80 and the upper tank 70.
  • the cheeks 96, 97 are attached to the outlet slot 95 so that they can be moved relative to one another.
  • a first cheek 96 (left in Fig.1 ) of the outlet slot 95, while the second cheek 97 of the outlet slot 95 is a wedge-shaped contact jaw that can be moved relative to the first cheek 96 and whose position can be adjusted from the outside using suitable means.
  • a worm gear (not shown) can be provided which, when the operator turns an adjusting wheel, ensures that the contact jaw (second cheek 97) is moved relative to the first cheek 96, thereby varying the gap width between the first cheek 96 and the second cheek 97.
  • the contact pressure of the contact jaw (second cheek 97) on the wiping belt 30 can be regulated and thus the degree to which the second wiping liquid absorbed by the wiping belt 30 in the upper tank 70 is wrung out again. This makes it possible to control the residual moisture of the second wiping liquid remaining in the wiping belt 30 after it exits the outlet slot 90.
  • the residual moisture can be adjusted as required to the surface condition of the surface to be cleaned with the mop 10.
  • the wiping belt 30 After the wiping belt 30 has exited the exit slot 95, the wiping belt 30 is guided around a deflection roller 101, which ensures that the wiping belt 30 experiences a change in its direction of movement and then rests with its inner side on the second side wall 24, along which it is guided downwards again to the underside 21 of the housing 20.
  • a deflection roller 101 ensures that the wiping belt 30 experiences a change in its direction of movement and then rests with its inner side on the second side wall 24, along which it is guided downwards again to the underside 21 of the housing 20.
  • the deflection roller 101 can optionally be designed as a manually rotatable deflection roller or, in a higher-quality embodiment, as a deflection roller that can be set in rotation by electric servomotors (not shown).
  • This provides a mop according to the invention which has a compact structure and allows a wiping belt 30 to be used in a continuous operation in which a relatively clean cleaning section of the wiping belt 30, wetted with the wiping liquid supplied from the upper tank 70, is made available as required by means of manual or motor-driven advancement of the wiping belt.

Landscapes

  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)

Claims (10)

  1. Serpillière (10), pourvue d'un boîtier (20) et d'un élément d'essuyage,
    l'élément d'essuyage étant conçu sous la forme d'une bande d'essuyage (30) fermée sur soi, laquelle dans un chemin fermé sur soi est susceptible d'être guidée autour et à travers le boîtier (20), sachant qu'elle est guidée à travers un séparateur d'impuretés mécanique dans le boîtier,
    un premier réservoir (80), dans lequel est prévu un premier dispositif de renvoi (100) pour la bande d'essuyage (30) étant prévu dans le boîtier (20), pour recevoir un premier liquide d'essuyage, ainsi qu'un deuxième élément de renvoi (101) étant prévu, pour renvoyer la bande d'essuyage (30) de la face supérieure du boîtier (20) vers la face inférieure (21) du boîtier (20)
    caractérisée en ce qu'au moins une partie du séparateur d'impuretés comporte des orifices de traversée (45) vers un compartiment collecteur (50) de particules grossières dans le boîtier (20), à travers lesquels des particules d'impuretés retirées de la bande d'essuyage (30) par le séparateur d'impuretés peuvent arriver dans le compartiment collecteur (50) de particules grossières,
    le premier réservoir (70) étant monté en-dessous du compartiment collecteur (50) de particules grossières, une fente de passage (90) étant prévue, laquelle relie l'intérieur du premier réservoir avec l'intérieur d'un deuxième réservoir (70), lequel est prévu pour recevoir un deuxième liquide d'essuyage, la fente de passage (90) étant dirigée vers la face supérieure (23) du boîtier (20),
    sur le côté du deuxième réservoir (70) dirigé vers la face supérieure (23) du boîtier (20) étant prévue une fente de sortie (95) pour la bande d'essuyage (30).
  2. Serpillière (10) selon la revendication 1, caractérisée en ce que sur la face supérieure (23) du boîtier est monté un mécanisme d'ancrage (11) pour un manche (12), destiné à guider la serpillière (10).
  3. Serpillière (10) selon la revendication 1 ou 2, caractérisée en ce qu'au moins le deuxième élément de renvoi (101) est un rouleau de renvoi (101) rotatif.
  4. Serpillière (10) selon la revendication 3, caractérisée en ce qu'un moteur de positionnement est monté sur le boîtier, pour amener activement en rotation le rouleau de renvoi (101).
  5. Serpillière (10) selon l'une quelconque des revendications précédentes, caractérisée en ce que le séparateur d'impuretés consiste en deux joues (42, 43) opposées, dont l'une (42) constitue une paroi extérieure du compartiment collecteur (50) de particules grossières.
  6. Serpillière (10) selon l'une quelconque des revendications précédentes, caractérisée en ce que largeur de la fente de sortie (95) est régulable.
  7. Serpillière (10) selon la revendication 6, caractérisée en ce que la largeur de la fente de sortie (95) est régulable par un déplacement relatif d'une joue de pressage (97) mobile via un entraînement par vis sans fin et d'une plaque de pressage (96) rigide.
  8. Serpillière (10) selon l'une quelconque des revendications précédentes, caractérisée en ce que le compartiment collecteur (50) de particules grossières et / ou le premier réservoir (70) et / ou le deuxième réservoir (80) sont reliés de manière amovible avec le boîtier (20).
  9. Procédé, destiné à utiliser une serpillière (10) selon l'une quelconque des revendications précédentes, dans le premier réservoir (70) et dans le deuxième réservoir (80) étant utilisé le même liquide d'essuyage.
  10. Procédé selon la revendication 9, le liquide d'essuyage dans le deuxième (80) réservoir étant dilué à l'eau par rapport au liquide d'essuyage dans le premier (70) réservoir.
EP20180101.6A 2020-06-15 2020-06-15 Serpillière Active EP3925508B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20180101.6A EP3925508B1 (fr) 2020-06-15 2020-06-15 Serpillière
US17/347,167 US11673167B2 (en) 2020-06-15 2021-06-14 Wiping mop

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20180101.6A EP3925508B1 (fr) 2020-06-15 2020-06-15 Serpillière

Publications (2)

Publication Number Publication Date
EP3925508A1 EP3925508A1 (fr) 2021-12-22
EP3925508B1 true EP3925508B1 (fr) 2024-05-22

Family

ID=71096638

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20180101.6A Active EP3925508B1 (fr) 2020-06-15 2020-06-15 Serpillière

Country Status (2)

Country Link
US (1) US11673167B2 (fr)
EP (1) EP3925508B1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3052905A (en) * 1960-10-24 1962-09-11 Mcmillan Warner Kyle Floor scrubbing machine
DE19849978C2 (de) * 1998-10-29 2001-02-08 Erwin Prasler Selbstfahrendes Reinigungsgerät
DE102004014371A1 (de) 2004-03-24 2005-10-20 Freudenberg Carl Kg Feuchtbodenwischgerät
DE102005024745B4 (de) 2005-02-28 2015-05-07 Leifheit Ag Eimer mit Spritz- und/oder Überschwappschutz
DE102005019624B4 (de) 2005-04-26 2017-05-24 Leifheit Ag Feuchtreinigungsgerät
DE102015105828A1 (de) * 2015-04-16 2016-10-20 Vorwerk & Co. Interholding Gmbh Feuchtwischgerät

Also Published As

Publication number Publication date
US20210387236A1 (en) 2021-12-16
EP3925508A1 (fr) 2021-12-22
US11673167B2 (en) 2023-06-13

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