WO2018077496A1 - Aspirateur - Google Patents

Aspirateur Download PDF

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Publication number
WO2018077496A1
WO2018077496A1 PCT/EP2017/068664 EP2017068664W WO2018077496A1 WO 2018077496 A1 WO2018077496 A1 WO 2018077496A1 EP 2017068664 W EP2017068664 W EP 2017068664W WO 2018077496 A1 WO2018077496 A1 WO 2018077496A1
Authority
WO
WIPO (PCT)
Prior art keywords
cyclone
collecting container
dust collecting
primary
dust
Prior art date
Application number
PCT/EP2017/068664
Other languages
German (de)
English (en)
Inventor
Paul-Gerhard Thomas
Original Assignee
Robert Thomas Metall- Und Elektrowerke Gmbh & 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 Robert Thomas Metall- Und Elektrowerke Gmbh & Co. Kg filed Critical Robert Thomas Metall- Und Elektrowerke Gmbh & Co. Kg
Priority to RU2019114237A priority Critical patent/RU2742286C2/ru
Publication of WO2018077496A1 publication Critical patent/WO2018077496A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/14—Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations
    • B04C5/185—Dust collectors
    • 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
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
    • A47L5/36—Suction cleaners with hose between nozzle and casing; Suction cleaners for fixing on staircases; Suction cleaners for carrying on the back
    • 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
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
    • A47L5/36—Suction cleaners with hose between nozzle and casing; Suction cleaners for fixing on staircases; Suction cleaners for carrying on the back
    • A47L5/362—Suction cleaners with hose between nozzle and casing; Suction cleaners for fixing on staircases; Suction cleaners for carrying on the back of the horizontal type, e.g. canister or sledge type
    • 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
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
    • A47L9/1616—Multiple arrangement thereof
    • A47L9/1625—Multiple arrangement thereof for series flow
    • 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
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
    • A47L9/1616—Multiple arrangement thereof
    • A47L9/1641—Multiple arrangement thereof for parallel flow
    • 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
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
    • A47L9/1683—Dust collecting chambers; Dust collecting receptacles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/24—Multiple arrangement thereof
    • B04C5/26—Multiple arrangement thereof for series flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/24—Multiple arrangement thereof
    • B04C5/28—Multiple arrangement thereof for parallel flow

Definitions

  • the present invention relates to a vacuum cleaner with a vacuum cleaner housing, wherein the condenser housing has a receiving device for receiving a cyclone dust collector unit comprising a primary cyclone dust collector and a secondary cyclone dust collector unit with a plurality of secondary cyclone dust collectors, wherein the Primary cyclone dust collector with a primary dust collector and the secondary cyclone
  • Dust separator unit is provided with a secondary dust collecting tank unit with at least one secondary dust collecting container.
  • a known from EP 2 677 915 B l known vacuum cleaner of the type mentioned has a cyclone Staubabscheiderritt, which is saddle-mounted on a housing in slide construction, in which the housing with Ro llen and / or sliders is provided so that the vacuum cleaner can be pulled over the floor by means of a suction hose connected to the housing.
  • the cyclone dust collector unit has a complex outer shape, which is particularly due to the fact that a primary cyclone dust collector extends at the top of the housing, whereas two secondary cyclone dust collector, the Form secondary cyclone dust collector unit, positioned on a front side of the housing on opposite sides of the housing.
  • the present invention has for its object to propose a vacuum cleaner with a vacuum cleaner housing in carriage design, which in a housing of the cyclone Staubabscheiderü in
  • the vacuum cleaner according to the invention has the features of claim 1.
  • the primary dust collecting container and the secondary dust collecting container unit are arranged in series in a common housing base designed as a housing lower part and detachably connected to a housing upper part of the cyclone dust collector unit, the primary dust collecting container being arranged on a side wall or on a side wall Having bottom of the housing base arranged lid.
  • the secondary dust collecting tank unit has only a secondary dust collecting tank
  • the primary dust collecting tank and the secondary dust collecting tank are arranged side by side to form the series arrangement.
  • the summary arrangement of the primary dust collecting container and the secondary dust collecting container unit in a housing lower part of a cyclone box on the one hand enable a compact design of the cyclone dust collector unit, which also accommodates them inside the vacuum cleaner housing allows. Due to the detachable connection of the lower housing part to the upper housing part, which has the primary cyclone dust collector and the secondary cyclone dust separator unit, the primary dust collector and the secondary dust collector unit can be easily separated from the cyclone part of the Zylon box, wherein the series arrangement of the primary dust collecting container and the secondary dust collecting container unit in the lower housing part enables targeted emptying of the primary dust collecting container or the secondary dust collecting container unit by virtue of the fact that the primary dust collecting container has a cover arranged on a side wall or at the bottom of the housing lower part.
  • the secondary dust collecting container unit has two secondary dust collecting containers, wherein the primary dust collecting container is arranged between the two secondary dust collecting containers for forming the series arrangement.
  • the lid is designed as a pivot cover, with a arranged at the upper edge of the lid pivot axis, so that a residue emptying of the coarse dust from the primary dust collecting container is possible without causing the lid is a hindrance.
  • the at least one secondary dust collecting container repels a removable dust cover with a plurality of openings assigned to the individual secondary cyclone dust collectors for input of secondary dust, so that it is possible to introduce cyclone pipes of the secondary cyclone dust collector into the Introduce secondary dust collection and at the same time to prevent coverage of the secondary dust collection container to protect against contamination of the interior of the Zyklonbox with fine dust.
  • the openings for positive recording serve end portions of the cyclone tubes of the secondary cyclone dust collector, such that opening edges of the openings enclose the end pieces.
  • Figure 1 is a vacuum cleaner housing in carriage construction in isometric view.
  • Fig. 5 is a sectional view of the cyclone box shown in Figure 4 according to section line V-V in Fig. 4.
  • Fig. 6 is a sectional view of the cyclone box shown in Figure 4 according to section line VI-VI in Fig. 4.
  • FIG. 7 is an exploded view of the cyclone box shown in FIG. 4; FIG.
  • FIG. 8 is a bottom view of a cyclone cover of the cyclone box shown in FIG. 7; FIG.
  • FIG. 9 shows a cyclone box in a second embodiment in an isometric view
  • FIG. 10 is a sectional view of the cyclone box shown in FIG. 9 according to section line XX in FIG. 9;
  • FIG. 10 is a sectional view of the cyclone box shown in FIG. 9 according to section line XX in FIG. 9;
  • FIG. 11 is a sectional view of the cyclone box shown in FIG. 9 according to section line XI-XI in FIG. 9;
  • FIG. FIG. 12 is an exploded view of that shown in FIG. 9
  • FIG. 13 is a bottom view of a cyclone cover of the cyclone box shown in FIG. 12.
  • FIG. 13 is a bottom view of a cyclone cover of the cyclone box shown in FIG. 12.
  • FIG. 1 shows a vacuum cleaner housing 20 in slide construction with a cyclone box 23 accommodated in a housing body 21 as a receiving chamber 22, the receiving chamber 22 being provided with a housing cover 24 (FIG. 2) provided with a suction opening 25 designed as a connection device to which a suction line not shown here can be connected, which is provided at its other end with a suction head, for example, formed as a suction brush.
  • FIG. 4 shows the cyclone box 23 in a single representation, the construction of which and the components required for constructing the cyclone box 23 being illustrated in FIG. 7.
  • the Zyklonbox 23 as essential components on a cyclone carrier 26 which is plate-shaped and approximately rectangular in shape and in a direction transverse to the longitudinal axis L of the vacuum cleaner housing 20 in series a primary cyclone area 27 and a secondary cyclone region 28.
  • a central axis M of the cyclone box 23 there is an intake manifold 29, which is arranged in a cyclone tube 3 1, which is arranged on the underside of the cyclone carrier 26 and provided with a tangential inflow channel 30 and designed as a cylinder, in particular also in FIG. 3
  • the illustrated primary cyclone Staubabscheiders 32 opens.
  • the cyclone tube 3 1 is formed in the present representation as independent of the cyclone carrier 26 component, which is glued in the trained Zyklonbox 23 with the underside of the cyclone carrier 26.
  • Also on the underside of the cyclone carrier 26 extends a conically formed in this case dip tube 33 of the primary cyclone dust collector 32, which is arranged in a defined by the cyclone carrier 26 air guide plane LF with an opening which an air outlet 34 of the primary cyclone Staubabscheiders 32 forms.
  • the secondary cyclone dust collector groups 35, 36 and 37 each have a plurality secondary cyclone Staubabscheider- units 38, which are arranged in a series arrangement 39, 40 and 41, wherein the two series arrangements 39, 40 in each case along a side edge 42, 43 of the Zyklonbox 23, here extend across the corner, and the array 41 is disposed at an angle to the side edges 42, 43 and extends obliquely inwardly from a side edge 44.
  • conical cyclone tubes 45 of the secondary cyclone dust collector 38 are formed, which extend from the bottom of the cyclone carrier 26, starting.
  • a cyclone cover 46 is arranged on the upper side of the cyclone carrier 26, which, in particular a combination of FIGS. 7 and 8 makes clear, is provided on its underside with channel webs 94, which, as FIG. 6 shows, form in combination with the cyclone carrier 26 tangential inflow channels 48 for the secondary cyclone dust separator 38 and a distribution channel system 49, such that in the defined by the cyclone carrier 26 air guide plane LF the air outlet 34 formed by means of the inflow channels 48 Air inlets 50 of the secondary cyclone dust collector 38 are connected.
  • immersion tubes 52 which have an opening in the cyclone cover 46, are formed on the cyclone cover 46.
  • FIG. 7 it is provided in the present case to arrange a housing seal 95 between the cyclone carrier 26 and the cyclone cover 46.
  • the cyclone carrier 26 is arranged on a housing lower part 54 such that the cyclone tube 3 1 of the primary cyclone dust collector 32 and the cyclone tubes 45 (FIG.
  • the housing lower part 54 for dividing into a primary dust collecting container 55 and a secondary dust collecting container 56 has a partition wall 57, such that the cyclone tube 3 1, at the lower end of which a Primärstau- bausgabeö opening is located in the primary dust collecting container 55 and the cyclone pipes 45th which have a secondary dust discharge opening at their lower end, protrude into the secondary dust collecting container 56 and are separated from one another by the dividing wall 57.
  • the lower housing part 54 is releasably connected to the cyclone carrier 26 via lever lugs 58, which are connected to the lower housing part 54 via an eccentric axle 59 pivotably mounted in the lower housing part 54.
  • latching webs 60 are formed on the top of the cyclone carrier, which are engaged behind in the preparation of a connection between the housing base 54 and the cyclone carrier 26 of latching claws 61 of the lever lugs 58.
  • a pivot cover 62 is arranged, which covers in its closed position formed in the side wall 101 only in the region of the primary dust collecting container 55 Entle fürsö opening 63.
  • the pivot cover 62 is mounted at its upper edge of the cover by means of a pivot axis 65 formed on the side wall 101 bearing receivers 66. Between an opening edge 67 of the discharge opening 63 and the pivot cover 62, a seal is provided.
  • a locking gear 68 with a mounted externally accessible in the pivot cover 62 drive wheel 69, the formed on the drive gear 69 and the locking plates 70, 71 toothing 72 a rotation of the Riegelharin 70, 71 allows, such that on the locking plates 70, 71 each formed screw flank 73 in
  • Bar latch 74 engages which are formed on a latching web 75 of the housing base 54.
  • the locking mechanism 68 of the pivot cover 62 described above allows easy operation and, on the other hand, a secure holding of the pivot cover 62 in its closed position, even when a strong overpressure is formed in the housing lower part 54.
  • a dust cover 76 is provided to cover the secondary dust collecting container 56, which is provided with openings 77 which in terms of their distribution and number in the dust cover 76 of the distribution and number of cyclone pipes 45 of Secondary cyclone dust collector 38 correspond.
  • the immersion tubes 52 with end pieces 78 penetrate the openings 77 such that opening edges 79 of the opening part surfaces 77 enclose the end pieces 78, so that particulate matter accumulated in the secondary dust collection tank 56 is prevented from outside the cyclone box 23 outside Secondary dust collection container 56 contaminated.
  • FIGS. 9 to 13 serve to illustrate a cyclone box 80 which, in contrast to the asymmetrically designed cyclone box 23 shown in FIGS. 1 to 8, which has secondary cyclone dust separator 38 only on one side of the central axis M, is symmetrical is formed with a central primary cyclone region 99 and two in each case laterally of the primary cyclone region 99 arranged secondary cyclone regions 100.
  • a cyclone box 80 which, in contrast to the asymmetrically designed cyclone box 23 shown in FIGS. 1 to 8, which has secondary cyclone dust separator 38 only on one side of the central axis M, is symmetrical is formed with a central primary cyclone region 99 and two in each case laterally of the primary cyclone region 99 arranged secondary cyclone regions 100.
  • the symmetrical configuration of the cyclone box 80 results from a symmetrical configuration of a cyclone carrier 8 1, at both sides of the central axis M has two series arrangements 82, 83 of secondary cyclone dust collectors 38 of a secondary cyclone dust collector unit 96, wherein the secondary cyclone dust collector 38 e each of a secondary cyclone Staubabscheiderlui 97, 98 along opposite side edges 84, 85 of the cyclone box 80 are arranged.
  • cylindrical tubes 45 of the secondary cyclone dust separator 38 are also formed on the cyclone carrier 8 1 on the cyclone carrier 8 1 and extend from the underside of the cyclone carrier 8 1, wherein openings of the cyclone tubes 45 in the through the cyclone carrier 8 1 defined air guide plane LF are arranged.
  • the primary cyclone dust collector 32 is located at the cyclone carrier 8 1 as well as the intake manifold 29 on the central axis M of the cyclone box 80th
  • a cyclone cover 86 which is to form a distribution channel system on the cyclone support 8 1, as shown in particular in FIG. 13, on a bottom with radially from a the air outlet 34 of the primary cyclone dust collector 32 covering manifold portion 87 of the cyclone cover 86 outgoing channel webs 94 which lead to air inlets 88 of the secondary cyclone dust collector 38 and there via tangential Anströmabismee 89 open into the air inlets 88.
  • dip tubes 52 are formed in correspondence with the air inlets 50 of the cyclone box 23, forming the air outlets 5 1 of the secondary cyclone dust collectors 35.
  • the symmetrical arrangement of the row arrangements 82, 83 of the secondary cyclone dust separator 35 results in a correspondingly symmetrical configuration of a housing lower part 90 of the cyclone box 80, with the housing lower part being symmetrical with respect to the center axis M of the cyclone box 8 90 a central primary dust collecting container 91, to which in each case laterally to the side walls 102, 103 adjacent secondary dust collecting container 92 are formed, such that the cyclone tube 3 1 of the primary cyclone Stababscheiders 32 into the primary dust collecting container 91 and the
  • Cyclone pipes 45 of the secondary cyclone dust collector 38 are received in the secondary dust collecting containers 92.
  • the primary dust collecting container 9 1 of the cyclone box 80 is also provided in a front side wall 104 with a pivot cover 62 which supports the already has with reference to FIG. 7 explained latch gear 68.
  • the secondary dust collecting containers 92 formed in the housing lower part 90 are each provided with a dust cover 93 (see also FIG. 10) corresponding to the dust cover 76 of the secondary dust collecting container 56 of the cyclone box 23 with openings 77 for receiving end pieces 78 of the cyclone pipes 45 the secondary cyclone dust collector 38 is used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)

Abstract

La présente invention concerne un aspirateur doté d'un boîtier d'aspirateur (20), le boîtier d'aspirateur (20) présentant un dispositif de réception destiné à recevoir une unité de précipitation de poussière à cyclone comprenant un précipitateur de poussière à cyclone primaire (32) et une unité de précipitation de poussière à cyclone secondaire comprenant une pluralité de précipitateurs de poussière à cyclone secondaires (38), le précipitateur de poussière à cyclone primaire (32) comprenant un réceptacle collecteur de poussière primaire (55) et l'unité de précipitation de poussière à cyclone secondaire comprenant une unité de réception collectrice secondaire dotée d'au moins un réceptacle collecteur de poussière secondaire, le réceptacle collecteur de poussière primaire (55) et l'unité de réception collectrice de poussière secondaire étant disposés en rangée dans une base de boîtier commune qui se présente sous la forme d'une partie inférieure de boîtier et est reliée à une partie supérieure de boîtier de l'unité de précipitation de poussière à cyclone se présentant sous forme de boîtier à cyclone (23), le réceptacle collecteur de poussière primaire (55) présentant un couvercle disposé sur une paroi latérale ou sur le fond de la partie inférieure de boîtier.
PCT/EP2017/068664 2016-10-25 2017-07-24 Aspirateur WO2018077496A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2019114237A RU2742286C2 (ru) 2016-10-25 2017-07-24 Пылесос

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016120310.6 2016-10-25
DE102016120310.6A DE102016120310A1 (de) 2016-10-25 2016-10-25 Staubsauger

Publications (1)

Publication Number Publication Date
WO2018077496A1 true WO2018077496A1 (fr) 2018-05-03

Family

ID=59564154

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/068664 WO2018077496A1 (fr) 2016-10-25 2017-07-24 Aspirateur

Country Status (3)

Country Link
DE (1) DE102016120310A1 (fr)
RU (1) RU2742286C2 (fr)
WO (1) WO2018077496A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080289139A1 (en) * 2007-05-24 2008-11-27 Makarov Sergey V Dual stage cyclonic vacuum cleaner
CN201333002Y (zh) * 2008-12-25 2009-10-28 杭州春兰电器实业有限公司 真空吸尘器用多级旋风除尘装置
EP2140793A1 (fr) * 2007-04-03 2010-01-06 Kingclean Electric Co., Ltd. Dispositif de dépoussiérage d'aspirateur
US20100263163A1 (en) * 2009-04-21 2010-10-21 Han Jung-Gyun Sealing member for dust separating apparatus
EP2677915B1 (fr) 2011-02-22 2014-11-12 Aktiebolaget Electrolux Aspirateur

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100725514B1 (ko) * 2005-10-19 2007-06-08 삼성광주전자 주식회사 진공청소기용 멀티 사이클론 집진장치
JP5002666B2 (ja) * 2010-03-08 2012-08-15 日立アプライアンス株式会社 電気掃除機
KR101641257B1 (ko) * 2014-10-07 2016-07-20 엘지전자 주식회사 진공청소기용 집진장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2140793A1 (fr) * 2007-04-03 2010-01-06 Kingclean Electric Co., Ltd. Dispositif de dépoussiérage d'aspirateur
US20080289139A1 (en) * 2007-05-24 2008-11-27 Makarov Sergey V Dual stage cyclonic vacuum cleaner
CN201333002Y (zh) * 2008-12-25 2009-10-28 杭州春兰电器实业有限公司 真空吸尘器用多级旋风除尘装置
US20100263163A1 (en) * 2009-04-21 2010-10-21 Han Jung-Gyun Sealing member for dust separating apparatus
EP2677915B1 (fr) 2011-02-22 2014-11-12 Aktiebolaget Electrolux Aspirateur

Also Published As

Publication number Publication date
RU2019114237A (ru) 2020-11-27
DE102016120310A1 (de) 2018-04-26
RU2019114237A3 (fr) 2020-11-27
RU2742286C2 (ru) 2021-02-04

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