WO1986001240A1 - Suction device - Google Patents

Suction device Download PDF

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Publication number
WO1986001240A1
WO1986001240A1 PCT/EP1985/000400 EP8500400W WO8601240A1 WO 1986001240 A1 WO1986001240 A1 WO 1986001240A1 EP 8500400 W EP8500400 W EP 8500400W WO 8601240 A1 WO8601240 A1 WO 8601240A1
Authority
WO
WIPO (PCT)
Prior art keywords
suction device
air
air nozzle
suction
flow
Prior art date
Application number
PCT/EP1985/000400
Other languages
German (de)
French (fr)
Inventor
Alfred Schmidt
Original Assignee
Ing. Alfred Schmidt Gmbh
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 Ing. Alfred Schmidt Gmbh filed Critical Ing. Alfred Schmidt Gmbh
Publication of WO1986001240A1 publication Critical patent/WO1986001240A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
    • E01H1/08—Pneumatically dislodging or taking-up undesirable matter or small objects; Drying by heat only or by streams of gas; Cleaning by projecting abrasive particles
    • E01H1/0827—Dislodging by suction; Mechanical dislodging-cleaning apparatus with independent or dependent exhaust, e.g. dislodging-sweeping machines with independent suction nozzles ; Mechanical loosening devices working under vacuum
    • E01H1/0836—Apparatus dislodging all of the dirt by suction ; Suction nozzles

Definitions

  • the invention relates to a suction device according to a sweeper. Preamble of claim 1.
  • Such a suction device is already known from German Offenlegungsschrift 24 46 728.
  • Their air guiding device is designed as a rearward, parallel extension of the suction device so that the air is sucked in between the suction device and the surface of the floor.
  • High flow losses have to be accepted, which noticeably reduces the sweeping effect.
  • Larger bumps also lead to considerable pressure fluctuations, which also have a negative impact on the sweeping result.
  • the closer the air guiding device is to the surface of the floor the greater the risk of its destruction when hitting obstacles, the further it is from the surface of the floor, the less the sweeping effect.
  • the present invention is based on the object of improving the effect of the air flow supplied to the suction device from the rear with little aerodynamic expenditure.
  • the inflow effect of the air on the floor surface to adapt to the spatial extent of the suction opening of the suction device is provided according to the invention in that the air nozzle is designed with a slot-shaped outlet opening which extends transversely to the direction of travel.
  • the air flowing out at high speed is deflected on the floor surface in a manner similar to the flow against a baffle plate. In this way, the dirt caught by the "blowing effect" is detached from the floor surface and fed to the suction opening.
  • the suction funnel expediently has a rear wall which is extended to the floor surface by means of a rubber-elastic sealing strip.
  • This sealing strip is advantageously dimensioned such that only a very small distance remains, for example from 10 mm to the floor surface, in such a way that supply air parallel to the floor is largely suppressed.
  • the sealing strip can overcome unevenness in the floor surface by being deformed elastically.
  • the velocity stack can have any suitable cross-sectional shape of flow auf ⁇ and moreover with means such as flaps Heil ⁇ for regulating amount of air flow velocities or 'speed provided
  • FIG. 1 shows a vertical cross section through the suction shaft and FIG. 2 shows a section according to FIG. II-II of Fig.!.
  • Fig. 1 shows as part of a sweeper that according to the sweeping direction.
  • a suction device 2 with a funnel-shaped air nozzle 3 at the rear.
  • the rear wall 4 of the air nozzle 3 is extended by a rubber-elastic sealing strip 5.
  • the front wall 6 of the air nozzle 3 facing the suction device 2 is connected to the rear wall 7 of the suction device
  • the suction device 2 connected by means of a U-shaped connecting part 8, preferably made of a rubber-like material.
  • the suction device 2 has a side plate 9 on both sides, which forms the frame for supporting the suction device 2 and the air nozzle 3.
  • Each side plate 9 is connected to the air nozzle 3 with a short connecting web 10 and to the suction device
  • a rubber-elastic sealing plate 12 is fastened, which serves to seal the flow at the bottom.
  • wheels 13 which serve to guide and support the suction device 2 on the surface 1 of the floor.
  • Arrow B in the air nozzle 3 with regard to the air quantity and speed is possible in a simple manner by means of an air flap 19 built into the air nozzle 3 and shown in dashed lines in the drawing; their position can either be adjusted by hand or fixed by remote control.
  • the backward opening flow angle of the air flow in the air nozzle 3 onto the surface 1 of the floor is preferably between 40 and 70 angles! straight; the log! this angle is located near the rear end of the suction opening 15.

Abstract

The action of an air stream supplied to the back side of a sweeping machine having a suction device (2) is improved by providing in the back side of the machine and next to the supply stream an air nozzle (3) in connection with the environment and comprising a discharge orifice (16) facing the floor (1) and a suction cone open upwardly.

Description

SaugeinrichtungSuction device
Die Erfindung betrifft eine Saugeinrichtung an einer Kehrmaschine gem. Oberbegriff von Patentanspruch 1.The invention relates to a suction device according to a sweeper. Preamble of claim 1.
Eine derartige Saugeinrichtung ist bereits aus der Deutschen Offen!egungsschrift 24 46 728 bekannt. Deren Luftleitvorrichtung ist als rückwärtige, boden- parallele Verlängerung der Saugeinrichtung ausgebil¬ det, so daß die Luft zwischen dieser und der Boden¬ oberfläche angesaugt wird. Dabei sind hohe Strömungs¬ verluste in Kauf zu nehmen, was den Kehreffekt spürbar reduziert. Größere Bodenebenheiten führen außerdem zu erheblichen Druckschwankungen, welche sich auf das Kehrergebnis ebenfalls negativ auswirken. Je näher die Luftleiteinrichtung zur Bodenoberfläche angeordnet ist, desto größer ist die Gefahr ihrer Zerstörung beim Auffahren auf Hindernisse, je weiter sie von der ßodenoberfl che entfernt ist, desto ge¬ ringer ist die Kehrwirkung.Such a suction device is already known from German Offenlegungsschrift 24 46 728. Their air guiding device is designed as a rearward, parallel extension of the suction device so that the air is sucked in between the suction device and the surface of the floor. High flow losses have to be accepted, which noticeably reduces the sweeping effect. Larger bumps also lead to considerable pressure fluctuations, which also have a negative impact on the sweeping result. The closer the air guiding device is to the surface of the floor, the greater the risk of its destruction when hitting obstacles, the further it is from the surface of the floor, the less the sweeping effect.
Demgegenüber liegt der vorliegenden Erfindung die Aufgabe zugrunde, die der Saugeinrichtung von der Rückseite zugeführte Luftströmung in ihre Wirkung bei geringem strömungstechnischen Aufwand zu verbes- In contrast, the present invention is based on the object of improving the effect of the air flow supplied to the suction device from the rear with little aerodynamic expenditure.
sern, ohne die Gebläse!e stung zu erhöhen.. without increasing the fan power. .
Diese Aufgabe wird erfindungsgemäß nach dem Kenn¬ zeichen von Patentanspruch 1 gelöst.This object is achieved according to the characterizing part of patent claim 1.
Der Lösungsgedanke beruht auf der Erkenntnis, daß eine im Rahmen der Kehrwirkung ausreichende zusätz¬ liche Luftströmung unter Verzicht auf aufwendige strömungstechnische Einrichtungen schon allein da¬ durch erzielbar ist, daß ein gesonderter, düsenför ig gestalteter Strömungskanal für die zugeführte Luft vorgesehen ist, wobei diese Luftströmung schräg gegen die Bodenoberfl che gerichtet ist.The idea of the solution is based on the knowledge that an additional air flow which is sufficient in the context of the reciprocal effect can be achieved without the need for complex fluidic equipment simply by providing a separate, nozzle-shaped flow channel for the supplied air, this air flow is directed obliquely against the floor surface.
Bei weitgehender Unterdrückung der bodenparaüelen Luftströmung gelangt die durch den Unterdruck vor der Saugöffnung der Saugeinrichtung angesaugte Luft durch einen die Lüftdüse bildenden Ansaugtrichter mit hoher Strömungsgeschwindigkeit auf die zu kehren¬ de Bodenoberfläche und kommt dort unterstützend zum Saugluftstrom der Saugeinrichtung zur Wirkung. Das Überraschungsmoment dabei ist, daß das Ausmaß dieser Wirkung etwa vergleichbar ist mit bekannten Blasluft¬ düsen, die über einen Druckschlauch an einem Ventila¬ tor angeschlossen sind. Gerade auf diesen zusätz- liehen strömungstechnischen Aufwand kann "aber nach dem erfindungsgemäßen Vorschlag verzichtet werden. Die Erfindung beschreitet damit erstmals einen Weg, wonach dieser Aufwand beschränkt wird auf die Anord¬ nung einer gesonderten Luftdüse, die bei geringen Strömungsverlusten eine ausreichende, von Bodenun¬ ebenheiten unabhängige Kehrwirkung erzeugt.If the air flow, which is parallel to the floor, is largely suppressed, the air sucked in by the negative pressure in front of the suction opening of the suction device reaches the floor surface to be swept at a high flow rate through a suction funnel forming the release nozzle and is there to support the suction air flow of the suction device. The surprising factor here is that the extent of this effect is roughly comparable with known blown air nozzles, which are connected to a fan via a pressure hose. Especially on this additional loan flow technical effort may be omitted according to the inventive proposal "but. The invention thus for the first time treading a path, after which this effort is limited to the Anord¬ voltage of a separate air nozzle that generates a sufficient flatness of Bodenun¬ independent reciprocal action at low flow losses.
Um. die Anströ wirkung der Luft auf die Bodenober¬ fläche der räumlichen Ausdehnung der Saugöffnung der Saugeinrichtung anzupassen ist erfindungsgemäß vorgesehen, daß die Luftdüse mit einer schlitzförmi¬ gen, sich quer zur Fahrtrichtung erstreckenden Aus¬ trittsöffnung ausgebildet ist. Die mit hoher Geschwin¬ digkeit ausströmende Luft wird auf der Bodenober¬ fläche ähnlich der Anströmung einer Prallplätte umge¬ lenkt. Der von der "Blaswirkung" erfaßte Schmutz wird auf diese Weise von der Bodenoberfläche abgelöst und der Saugöffnung zugeführt.Around. The inflow effect of the air on the floor surface to adapt to the spatial extent of the suction opening of the suction device is provided according to the invention in that the air nozzle is designed with a slot-shaped outlet opening which extends transversely to the direction of travel. The air flowing out at high speed is deflected on the floor surface in a manner similar to the flow against a baffle plate. In this way, the dirt caught by the "blowing effect" is detached from the floor surface and fed to the suction opening.
Der Ansaugtrichter besitzt zweckmäßig eine Rückwand, die mittels einer gummielastischen Dichtungsleiste zur Bodenoberfläche hin verl ngert ist. Diese Dich¬ tungsleiste ist vorteilhaft so zu bemessen, daß nur noch ein sehr kleiner Abstand, z.B. von 10mm bis zur Bodenoberfläche offenbleibt, derart, daß eine bodenparallele Zuluft weitgehend unterdrückt wird. Unebenheiten der Bodenoberfl che vermag die Dichtungs¬ leiste zu überwinden, indem sie sich elastisch ver¬ formt.The suction funnel expediently has a rear wall which is extended to the floor surface by means of a rubber-elastic sealing strip. This sealing strip is advantageously dimensioned such that only a very small distance remains, for example from 10 mm to the floor surface, in such a way that supply air parallel to the floor is largely suppressed. The sealing strip can overcome unevenness in the floor surface by being deformed elastically.
Die Wirkung sowohl der primären Saugluftstörung als auch der Luftströmung in der Luftdüse kann noch da¬ durch verbessert werden, daß die Saugeinrichtung^ beidseitig mittels dicht über der Bodenoberfläche endenden gummielastischen Dichtungsplatten abgeschlos¬ sen ist, welche sich nach rückv/ärts bis hinter die Luftdüse erstrecken.The effect of both the primary Saugluftstörung and the air flow in the air jet may still da¬ be improved in that the suction device is sen abgeschlos¬ ^ both sides by means closely over the bottom surface ending elastic joint plates which AERTS extend rückv / up behind the air nozzle .
Im Rahmen der Erfindung kann der Ansaugtrichter jede strömungstechnisch geeignete Querschnittsform auf¬ weisen und darüberhinaus mit Einrichtungen wie Luft¬ klappen zum Regulieren von Luftmenge bzw. Strömungsge- 'schwindigkeit versehen seinBe within the scope of the invention, the velocity stack can have any suitable cross-sectional shape of flow auf¬ and moreover with means such as flaps Luft¬ for regulating amount of air flow velocities or 'speed provided
Im folgenden wird ein Ausführungsbeispiel der Erfin¬ dung anhand der Zeichnung erläutert, es zeigtAn exemplary embodiment of the invention is explained below with reference to the drawing, which shows
Fig. 1 einen vertikalen Querschnitt durch den Saug¬ schacht und Fig. 2 einen Schnitt gem. II-II der Fig. !. 1 shows a vertical cross section through the suction shaft and FIG. 2 shows a section according to FIG. II-II of Fig.!.
Fig. 1 zeigt als Teil einer Kehrmaschine , die in Kehrrichtung gem. Pfeil R über die BodenoberflächeFig. 1 shows as part of a sweeper that according to the sweeping direction. Arrow R across the floor surface
1 bewegt wird, eine Saugeinrichtung 2, mit einer trichterförmigen Luftdüse 3 an deren Rückseite. Die Rückwand 4 der Luftdüse 3 ist durch eine gummi- elastische Dichtungsleiste 5 verlängert. Die der Saugeinrichtung 2 zugewandte vordere Wand 6 der Luft- düse 3 ist mit der Rückwand 7 der Saugeinrichtung1 is moved, a suction device 2, with a funnel-shaped air nozzle 3 at the rear. The rear wall 4 of the air nozzle 3 is extended by a rubber-elastic sealing strip 5. The front wall 6 of the air nozzle 3 facing the suction device 2 is connected to the rear wall 7 of the suction device
2 mittels eines U-förmigen Verbindungsteils 8, bevor¬ zugt aus einem gummiartigen Werkstoff, verbunden. Die Saugeinrichtung 2 besitzt auf beiden Seiten eine Seitenplatte 9, welche den Rahmen für die Abstützung von Saugeinrichtung 2 und Luftdüse 3 bildet- Jede Seitenplatte 9 ist mit der Luftdüse 3. it einem kur¬ zen Verbindungssteg 10 und mit der Saugeinrichtung2 connected by means of a U-shaped connecting part 8, preferably made of a rubber-like material. The suction device 2 has a side plate 9 on both sides, which forms the frame for supporting the suction device 2 and the air nozzle 3. Each side plate 9 is connected to the air nozzle 3 with a short connecting web 10 and to the suction device
2 über einen weiteren Verbindungssteg 11 verbunden. Jeweils an der Außenseite der Seitenplatten 9 ist eine gummielastische Dichtungsplatte 12 befestigt, welche der bodenseitigen Strömungsabdichtung dient. An den Seitenplatten 9 sind ferner Laufräder 13 ge¬ lagert, die der Führung und Abstützung der Saugein¬ richtung 2 auf der Bodenoberfl che 1 dienen.2 connected via a further connecting web 11. In each case on the outside of the side plates 9, a rubber-elastic sealing plate 12 is fastened, which serves to seal the flow at the bottom. On the side plates 9 there are also wheels 13 which serve to guide and support the suction device 2 on the surface 1 of the floor.
Die in Richtung des Pfeils F durch die Saugeinrich¬ tung 2 und den daran angeschlossenen Saugschlauch 14 abgesaugte Luft erzeugt unter der Saugöffnung 15 einen Unterdruck, welcher die Ursache ist für eine bodenparallele Zuströmung gem. Pfeil 3 von vorne und für eine durch die Luftdüse 3 gem. Pfeil B zu¬ strömende Luftströmung. Letztere verläßt die Luftdüse 3 durch deren Austrittsöffnung 16 . Die dort austre¬ tende Luft wird beim Aufprall auf die Bodenober¬ fl che 1 gemäß Pfeil L in Richtung auf die Saugöffnung 15 umgelenkt; dabei aufgewirbelte Schmutzteilchen gelangen direkt gegen die Rückseite einer die Vorder¬ wand des Saugeinrichtung 2 verl ngernden gummi- elastischen Bodenleiste 17 , wo sie vom Saugluftstrom durch die Saugeinrichtung 2 erfaßt werden.The air sucked off in the direction of arrow F by the suction device 2 and the suction hose 14 connected to it generates under the suction opening 15 a negative pressure, which is the cause of an inflow parallel to the floor according to. Arrow 3 from the front and for a through the air nozzle 3 acc. Arrow B flowing air flow. The latter leaves the air nozzle 3 through its outlet opening 16. The air escaping there is deflected in the direction of the suction opening 15 in the event of an impact on the floor surface 1 according to arrow L; swirled dirt particles come directly against the back of a rubber-elastic base strip 17 which extends the front wall of the suction device 2, where they are caught by the suction air flow through the suction device 2.
In Fig. 1 sind die Laufräder 13 weggelassen; stattdes¬ sen wurde deren Achse' 18 durch eine Kreuzmarkierung angegeben.In Fig. 1, the impellers 13 are omitted; instead, their axis ' 18 was indicated by a cross marking.
Eine Regulierung der Luftströmung gem. Pfeil B in der Luftdüse 3 hinsichtlich Luftmenge und -geschwin- digkeit ist auf einfache Weise durch eine in die Luftdüse 3 eingebaute, in der Zeichnung strich!iert dargestellte Luftklappe 19 möglich; deren Stellung kann entweder von Hand einstellbar oder durch Fernbe¬ dienung fixierbar sein. Der sich nach rückwärts öffnende Anströmwinkel der Luftströmung in der Luftdüse 3 auf die Bodenober¬ fl che 1 beträgt bevorzugt zwischen 40 und 70 Winke! grade; der Scheite! dieses Winkels befindet sich dabei nahe dem rückwärtigen Ende der Saug¬ öffnung 15. A regulation of the air flow acc. Arrow B in the air nozzle 3 with regard to the air quantity and speed is possible in a simple manner by means of an air flap 19 built into the air nozzle 3 and shown in dashed lines in the drawing; their position can either be adjusted by hand or fixed by remote control. The backward opening flow angle of the air flow in the air nozzle 3 onto the surface 1 of the floor is preferably between 40 and 70 angles! straight; the log! this angle is located near the rear end of the suction opening 15.

Claims

7 Patentansprüche 7 claims
Saugeinrichtung einer Kehrmaschine, mit auf der Rückseite der Saugeinrichtung (2) angeordneter, mit deren Unterdruck beaufschlagter Luftleitvor¬ richtung, welche zustromseitig mit der Umgebung verbunden ist, dadurch gekennzeichnet, daß die Luftleitvorrichtung als Luftdüse (3) ausge¬ bildet ist, mit einer gegen die Bodenober¬ fläche (1) gerichteten Austrittsöffnung (16) und mit einem sich nach oben öffnenden Ansaugtrichter.Suction device of a sweeper, with on the back of the suction device (2) arranged, with its negative pressure Luftleitvor¬ direction, which is connected on the inflow side to the environment, characterized in that the air guiding device is designed as an air nozzle (3), with a counter the bottom surface (1) directed outlet opening (16) and with an upwardly opening suction funnel.
2. Saugeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Austrittsöffnung (!6) der Luftdüse (3) schlitzförmig ausgebildet ist, und sich quer zur Kehrrichtuπg (R) erstreckt.2. Suction device according to claim 1, characterized in that the outlet opening (! 6) of the air nozzle (3) is slot-shaped, and extends transversely to the Kehrrichtuπg (R).
3. Saugeinrichtung nach Anspruch 1 oder 2, dadruch gekennzeichnet, daß die Rückwand (4) der Luftdüse (3) mittels einer gummielastischen Dichtungsleiste (5) zur Bodenoberfläche (1) hin verlängert ist. 63. Suction device according to claim 1 or 2, characterized in that the rear wall (4) of the air nozzle (3) by means of a rubber-elastic sealing strip (5) to the floor surface (1) is extended. 6
4. Saugeinrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß sie beidsεitig mittels dicht über der Boden¬ oberfläche (1) endender gummielastischer Dichtungs¬ platten (12) abgeschlossen ist, welche sich nach rückwärts bis hinter die Luftdüse (3) erstrecken.4. Suction device according to one of claims 1 or 2, characterized in that it is closed on both sides by means of rubber-elastic sealing plates (12) which end just above the bottom surface (1) and which extend backwards behind the air nozzle (3) .
5. Saugeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Menge bzw. Geschwindigkeit der Luftströ¬ mung in der Luftdüse (3) mittels einer darin einge¬ bauten verstellbaren Luftklappe (19) regulierbar ist. 5. Suction device according to claim 1, characterized in that the amount or speed of Luftström¬ flow in the air nozzle (3) by means of a built-in adjustable air flap (19) is adjustable.
PCT/EP1985/000400 1984-08-08 1985-08-06 Suction device WO1986001240A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3429174 1984-08-08
DEP3429174.1 1984-08-08
DE19843442602 DE3442602C1 (en) 1984-08-08 1984-11-22 Suction device
DEP3442602.7 1984-11-22

Publications (1)

Publication Number Publication Date
WO1986001240A1 true WO1986001240A1 (en) 1986-02-27

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ID=25823684

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Application Number Title Priority Date Filing Date
PCT/EP1985/000400 WO1986001240A1 (en) 1984-08-08 1985-08-06 Suction device

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DE (1) DE3442602C1 (en)
WO (1) WO1986001240A1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3805162A1 (en) * 1987-02-27 1988-09-08 Tymco Inc QUICK RECEIVING HEAD
US5208941A (en) * 1992-06-23 1993-05-11 Mark Ettere High power vacuum attachment apparatus
DE29914329U1 (en) * 1999-08-16 2000-12-28 Faun Viatec Gmbh Suction nozzle
US6381801B1 (en) * 2000-05-10 2002-05-07 Clean Up America, Inc. Self-propelled brushless surface cleaner with reclamation
EP1401316A1 (en) * 2001-05-18 2004-03-31 Clean Up America, Inc. Self-propelled brushless surface cleaner with reclamation
US7028925B2 (en) 2003-05-14 2006-04-18 Castle Rock Industries, Inc. Spray gun for use with an all surface cleaning apparatus
US7278181B2 (en) 2001-02-24 2007-10-09 Dyson Technology Limited Vacuum cleaner with air bleed
US8245345B2 (en) 2003-05-14 2012-08-21 Karcher North America, Inc. Floor treatment apparatus
US8887340B2 (en) 2003-05-14 2014-11-18 Kärcher North America, Inc. Floor cleaning apparatus
US8978190B2 (en) 2011-06-28 2015-03-17 Karcher North America, Inc. Removable pad for interconnection to a high-speed driver system
USD907868S1 (en) 2019-01-24 2021-01-12 Karcher North America, Inc. Floor cleaner

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GB2296026B8 (en) * 1994-12-13 1999-07-06 Haller Umweltsysteme Gmbh & Co Sweeping machine with dust extraction
DE19524203C2 (en) * 1994-12-13 1999-07-29 Haller Umweltsysteme Gmbh & Co Sweeper with dust extraction
DE19520778C1 (en) * 1995-06-07 1996-07-18 Juergen Pierau Suction arrangement for street cleaner
DE10030725C2 (en) * 2000-06-23 2002-04-25 Hako Gmbh Mobile floor cleaning device
CN104674735B (en) * 2013-11-28 2016-08-24 长沙中联重科环卫机械有限公司 Suction nozzle and road cleaning vehicle

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US2157077A (en) * 1938-10-06 1939-05-02 Filtex Corp Vacuum sweeper nozzle and the like
US2230077A (en) * 1937-04-19 1941-01-28 B F Sturtevant Co Vacuum cleaner
FR2022687A1 (en) * 1968-11-06 1970-08-07 Streicher M
FR2286918A1 (en) * 1974-10-01 1976-04-30 Schoerling Waggonbau SELF-PICKING UP SWEEPERS WITH PRESSURE TRANSPORT

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Publication number Priority date Publication date Assignee Title
US2018791A (en) * 1930-10-20 1935-10-29 Kern Bernard Pneumatic cleaner
US2230077A (en) * 1937-04-19 1941-01-28 B F Sturtevant Co Vacuum cleaner
US2157077A (en) * 1938-10-06 1939-05-02 Filtex Corp Vacuum sweeper nozzle and the like
FR2022687A1 (en) * 1968-11-06 1970-08-07 Streicher M
FR2286918A1 (en) * 1974-10-01 1976-04-30 Schoerling Waggonbau SELF-PICKING UP SWEEPERS WITH PRESSURE TRANSPORT

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3805162C2 (en) * 1987-02-27 2000-10-05 Tymco Inc Suction cleaner
DE3805162A1 (en) * 1987-02-27 1988-09-08 Tymco Inc QUICK RECEIVING HEAD
US5208941A (en) * 1992-06-23 1993-05-11 Mark Ettere High power vacuum attachment apparatus
DE29914329U1 (en) * 1999-08-16 2000-12-28 Faun Viatec Gmbh Suction nozzle
USRE39422E1 (en) * 2000-05-10 2006-12-12 Clean Up America Inc. Self-propelled brushless surface cleaner with reclamation
US6381801B1 (en) * 2000-05-10 2002-05-07 Clean Up America, Inc. Self-propelled brushless surface cleaner with reclamation
WO2002094076A1 (en) * 2000-05-10 2002-11-28 Clean Up America, Inc. Self-propelled brushless surface cleaner with reclamation
US7278181B2 (en) 2001-02-24 2007-10-09 Dyson Technology Limited Vacuum cleaner with air bleed
EP1401316A1 (en) * 2001-05-18 2004-03-31 Clean Up America, Inc. Self-propelled brushless surface cleaner with reclamation
EP1401316A4 (en) * 2001-05-18 2006-11-02 Clean Up America Inc Self-propelled brushless surface cleaner with reclamation
US9015887B1 (en) 2003-05-14 2015-04-28 Kärcher North America, Inc. Floor treatment apparatus
US8245345B2 (en) 2003-05-14 2012-08-21 Karcher North America, Inc. Floor treatment apparatus
US8887340B2 (en) 2003-05-14 2014-11-18 Kärcher North America, Inc. Floor cleaning apparatus
US7028925B2 (en) 2003-05-14 2006-04-18 Castle Rock Industries, Inc. Spray gun for use with an all surface cleaning apparatus
US9192276B2 (en) 2003-05-14 2015-11-24 Karcher North America, Inc. Floor cleaning apparatus
US9451861B2 (en) 2003-05-14 2016-09-27 Kärcher North America, Inc. Floor treatment apparatus
US9510721B2 (en) 2003-05-14 2016-12-06 Karcher North America, Inc. Floor cleaning apparatus
US9730566B2 (en) 2003-05-14 2017-08-15 Kärcher North America, Inc. Floor treatment apparatus
US9757005B2 (en) 2003-05-14 2017-09-12 Kärcher North America, Inc. Floor treatment apparatus
US10555657B2 (en) 2003-05-14 2020-02-11 Kärcher North America, Inc. Floor treatment apparatus
US8978190B2 (en) 2011-06-28 2015-03-17 Karcher North America, Inc. Removable pad for interconnection to a high-speed driver system
USD907868S1 (en) 2019-01-24 2021-01-12 Karcher North America, Inc. Floor cleaner

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