US3460187A - Suction cleaners with wheel adjustment - Google Patents

Suction cleaners with wheel adjustment Download PDF

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Publication number
US3460187A
US3460187A US615958A US3460187DA US3460187A US 3460187 A US3460187 A US 3460187A US 615958 A US615958 A US 615958A US 3460187D A US3460187D A US 3460187DA US 3460187 A US3460187 A US 3460187A
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US
United States
Prior art keywords
wheels
casing
suction
cleaner
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.)
Expired - Lifetime
Application number
US615958A
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English (en)
Inventor
Gordon Thomas Fillery
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.)
Mauz and Pfeiffer GmbH and Co KG
Original Assignee
Mauz and Pfeiffer GmbH and Co KG
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Filing date
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Application filed by Mauz and Pfeiffer GmbH and Co KG filed Critical Mauz and Pfeiffer GmbH and Co KG
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    • 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
    • A47L9/02—Nozzles
    • A47L9/04—Nozzles with driven brushes or agitators
    • A47L9/0405—Driving means for the brushes or agitators
    • A47L9/0411—Driving means for the brushes or agitators driven by electric motor
    • 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
    • A47L5/28—Suction cleaners with handles and nozzles fixed on the casings, e.g. wheeled suction cleaners with steering handle
    • 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
    • A47L5/28—Suction cleaners with handles and nozzles fixed on the casings, e.g. wheeled suction cleaners with steering handle
    • A47L5/30—Suction cleaners with handles and nozzles fixed on the casings, e.g. wheeled suction cleaners with steering handle with driven dust-loosening tools, e.g. rotating brushes
    • 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
    • A47L5/28—Suction cleaners with handles and nozzles fixed on the casings, e.g. wheeled suction cleaners with steering handle
    • A47L5/34—Suction cleaners with handles and nozzles fixed on the casings, e.g. wheeled suction cleaners with steering handle with height adjustment of nozzles or dust-loosening tools
    • 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
    • A47L9/02—Nozzles
    • A47L9/04—Nozzles with driven brushes or agitators
    • A47L9/0427—Gearing or transmission means therefor
    • A47L9/0444—Gearing or transmission means therefor for conveying motion by endless flexible members, e.g. 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
    • 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
    • A47L9/02—Nozzles
    • A47L9/04—Nozzles with driven brushes or agitators
    • A47L9/0494—Height adjustment of dust-loosening tools

Definitions

  • suofronlcnmnsns WITH WHEEL ADJUSTMENT Filed Feb. 14, 1967 5 Sheets-Sheet 3 United States Patent O 3,460,187 SUCTION CLEANERS WITH WHEEL ADJUSTMENT Gordon Thomas Fillery, Biot, UNE-Maritimes, France, assignor to Manz & Pfeiffer G.m.b.H. & Co. KG, Stuttgart-Botnang, Germany, a German company Filed Feb. 14, 1967, Ser. No. 615,958 Claims priority, application Great Britain, Feb. 18, 1966, 7,352/66 Int. Cl. A471 /34 U.S. Cl. 15--361 S Claims ABSTRACT OF THE DISCLOSURE
  • a suction cleaner is mounted on at least three spaced apart wheels which are simultaneously adjusted relatively to the casing of the cleaner so that upon adjustment the cleaner maintains the same disposition with respect to the floor surface.
  • This invention concerns a suction cleaner for cleaning carpets of the type comprising a casing, an electric motor within the casing, a suction fan driven by the motor, a suction opening in the casing directed downwardly towards the carpet, a dirt receptacle and a duct extending from the dirt receptacle to the suction fan, the suction of the fan creating a stream of air which flows through the suction opening, into the dirt receptacle for collection therein of dirt borne by the airstream.
  • carpets are now commonly made having piles of greatly varying depth and the material of the piles also varies considerably so that a hard or a soft pile may be provided.
  • it is customary to provide for height adjustment of the suction nozzle by raising and lowering floor-engaging wheels.
  • niechanical means is provided for such adjustment, it is at times a strenuous and inaccurate operation.
  • the present invention has for an object to overcome or minimise this disability, in combination with avoiding reduction in the .effectiveness of the suction nozzle on such adjustment due to tilting.
  • a rotary carpet beater and/or brush assembly within the suction opening and extending partly through the opening to engage the carpet, the assembly being driven by the motor.
  • a rotary beater and/ or brush assembly is referred to herein simply as a beater assembly. It is a further object of this invention to provide that on height adjustment of the cleaner the effectiveness of the beater assembly is not substantially impaired.
  • a suction cleaner of the type set forth is characterized in that the suction cleaner is mounted on at least three spaced-apart wheels adjustably carried by the casing for raising and lowering the casing relatively to the carpet and there is means for simultaneously adjusting the distance of all of the wheels relatively to the casing, and duid-pressure means for operating the adjusting means.
  • Wheels are to be understood as including sliders, rollers or the like.
  • the wheels are disposed substantially in a central region of the suction cleaner.
  • FIG. 1 is a diagrammatic side view of a non-elected form of suction cleaner of the type set forth
  • FIG. 2 is a section on the line II-II of FIG. 1 and to a larger size
  • FIG. 3 is a section on the line III-III of FIG. 2,
  • FIG. 4 is a View corresponding to FIG. 3 showing an arrangement of height adjusting mechanism according to this invention
  • FIG. 5 is a view corresponding to FIG. 3 showing yet another arrangement of height adjusting mechanism according to the present invention
  • FIG. 6 is a schematic view of a pneumatic control for the height adjusting mechanism of FIG. 4 or FIG. 5, and
  • FIGS. 7 and 8 are sectional views to a larger size on the lines VII-VII and VIII-VIII respectively of FIG. 6.
  • the suction cleaning apparatus comprises a casing 10 mounted upon two pairs of axiallyspaced wheels 11 for to and fro movement across a carpet to be cleaned.
  • An electric motor 12 drives a fan unit 13 and a pulley 14.
  • a horizontal brush and/or beater member 15 at each end of the casing is driven by pulley 14 through belts 16.
  • a dust receiving receptacle 17 is between each brush member 15 and motor 12.
  • Each receptacle 17 is supported on a frame 18 carried by casing 10.
  • the rear wall of each receptacle 17 incorporates a iilter element 19 and the top edge of the front wall of the receptacle is spaced from a door 20, hinged at 21 to casing 10.
  • Door 20 gives access to the interior of casing 10 for removal and replacement of receptacle 17.
  • the door also gives ready access to brush member 15 for removal and replacement of the brush member.
  • This arrangement is more fully described in the specication of Ser. No. 615, 956 of Gordon T. Fillery tiled Feb. 14, 1967.
  • a handle 22 is pivoted at 23 to casing 10, the cleaner apparatus being moved to and fro by the handle.
  • the wheels 11 are within a housing 24 forming part of casing 10.
  • the brush members 15 are rotatably driven in opposite directions by motor 12.
  • the wheels 11 are vertically adjustable from the dotted to the chain dotted position shown in FIG. 3 and vice versa thereby to vary the height of the cleaner which during adjustment maintains the same disposition of the cleaner with respect to the carpet surface X to accommodate for dilerent depths of carpet pile.
  • the suction of fan unit 13 is applied to each receptacle 17 through lter element 19 by a duct 25 and as a consequence ⁇ a stream of air is drawn past each brush member 15, and dust-laden air passing into the receptacle in which the dirt collects.
  • the discharge side of the fan unit 13 is in a side wall of the casing 10.
  • FIGS. 2 and 3' A non-elected mechanism for adjusting wheels 11 is shown in FIGS. 2 and 3'.
  • Each pair of wheels 11 is carried on an axle 26.
  • Each axle 26 is supported by a pair of axially-spaced arms 27 pivotally mounted upon a rod 28 the ends of which are received by brackets 29 depending from the roof of wheel housing 24.
  • Integral with each of the arms 27 is a lever 30 disposed generally vertical.
  • the levers 30 (see FIG. 3) are spaced apart to receive therebetween a spring 31 which acts to urge the levers apart with consequential movement of the two pairs of wheels into the housing i.e. to retract the wheels.
  • a Bowden cable 32 is connected to levers 30 for simultaneous movement of the levers towards each other with compression of spring 31.
  • the Bowden cable is actuated in well known manner by a hand lever (not shown) carried on the handle 22 convenient to the user of the cleaner.
  • FIG. 4 A mechanism according to the invention is shown in FIG. 4 wherein the same reference numerals refer to like parts.
  • the levers 30 are connected respectively to the piston 33 and to the cylinder 34 of a pneu-matic piston-cylinder unit generally indicated by the reference numeral 35.
  • a spring 36 may be provided within cylinder 34 which acts to move levers 30 towards each other i.e. to retract wheels 11 into housing 24.
  • Wheel retraction may be adquately achieved by the weight of the apparatus supported by the wheels, the spring 36 being dispensed with.
  • Air under pressure is supplied to cylinder 34 (as later fully explained) by a exible pipe 37 which extends up the handle 22 whereby the levers 30 are moved apart to advance the pairs of wheels from housing 24.
  • a pneumatic piston-cylinder unit 35 depends from the roof of housing 24.
  • the piston 33 is connected to a platform member 38 having at each end a vertical slider 39 which is mounted for vertical movement in a guide member 40 secured to housing 24. Again the weight of the apparatus acts to retract wheels 11 into housing 24 and this is assisted by spring 36.
  • the unit 35 is connected to a source of air under pressure by a flexible pipe 37.
  • the pipe 37 extends up handle 22 to a cross member 41 where it is connected by a T-piece 42 to branch pipes 43, 44.
  • Pipe 43 is connected to an air bulb 55 comprising a pair of ball valves 45, 46 which ensure that when the bulb is pressed air is forced under pressure into unit 35 to advance wheels 11 from housing 24.
  • Air delivered to unit 35 can not return to the bulb, this being ensured by valve 46.
  • Pipe 44 terminates in a button valve 47 comprising a housing 48 within which is a spring 49 urging a valve member 50 against a seat 51 to close hole 52 through which a button 53 loosely extends.
  • Member 50 is faced with a resilient material 56 to ensure an air tight seal. When button 53 is pressed inwardly air from unit 35 is permitted to escape to atmosphere so that wheels 11 are retracted into housing 24.
  • FIG. 4 or FIG. 5 may be readily adapted for hydraulic operation.
  • piston-cylinder unit 35 instead of piston-cylinder unit 35 an expansible bellows may be used.
  • a suction cleaner as claimed in claim 1 wherein two pairs of axially spaced wheels are provided in a wheel housing constituting a part of the casing, each pair of wheels being pivotally mounted on the casing for movement into and out of the housing.
  • a suction cleaner as claimed in claim 5 wherein two pairs of axially spaced wheels are provided in a wheel housing constituting a part of the casing, each pair of wheels being pivotally mounted on the casing for movement into and out of the housing.
  • a suction cleaner according to claim 5 wherein two pairs of axially spaced wheels are carried by a platform which is slidably mounted in a wheel housing constituting a part of the casing for vertical adjustment relatively to the casing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles For Electric Vacuum Cleaners (AREA)
  • Electric Suction Cleaners (AREA)
US615958A 1966-02-18 1967-02-14 Suction cleaners with wheel adjustment Expired - Lifetime US3460187A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7352/66A GB1173011A (en) 1966-02-18 1966-02-18 Improvements in or relating to Suction Cleaners

Publications (1)

Publication Number Publication Date
US3460187A true US3460187A (en) 1969-08-12

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
US615956A Expired - Lifetime US3482276A (en) 1966-02-18 1967-02-14 Suction cleaners
US615958A Expired - Lifetime US3460187A (en) 1966-02-18 1967-02-14 Suction cleaners with wheel adjustment

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US615956A Expired - Lifetime US3482276A (en) 1966-02-18 1967-02-14 Suction cleaners

Country Status (6)

Country Link
US (2) US3482276A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH448408A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (3) DE1628726A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (2) FR1511867A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1173011A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (3) NL6702322A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040031111A1 (en) * 2002-08-14 2004-02-19 Jose Porchia Disposable dust receptacle
US7150068B1 (en) * 2002-08-12 2006-12-19 Gary Dean Ragner Light-weight self-propelled vacuum cleaner
US20070277344A1 (en) * 2006-06-06 2007-12-06 Sam Kim Carpet cleaner with pressed-down suction
US20080092325A1 (en) * 2003-08-26 2008-04-24 Bissell Homecare, Inc. Bare floor cleaner
WO2017106900A1 (en) * 2015-12-22 2017-06-29 Run The Race Pty Ltd Improved vacuum head attachment and vacuum cleaner
WO2018127680A1 (en) * 2017-01-09 2018-07-12 Dyson Technology Limited Cleaner head for a vacuum cleaner

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SE370616B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1972-12-15 1974-10-28 Electrolux Ab
US3872539A (en) * 1973-02-12 1975-03-25 John S Doyel Hand-held cleaning device utilizing air flow and broom action
US4571772A (en) * 1982-12-27 1986-02-25 Prototypes, Ltd. Upright vacuum cleaning appliance
US4648149A (en) * 1984-10-09 1987-03-10 National Union Electric Corp. Vacuum cleaner assembly
DE3904396A1 (de) * 1989-02-14 1990-08-16 Mauz & Pfeiffer Progress Bodenduese fuer staubsauger
US5013367A (en) * 1990-01-22 1991-05-07 Butts James N Rug cleaning apparatus
US5018240A (en) * 1990-04-27 1991-05-28 Cimex Limited Carpet cleaner
USD334602S (en) 1990-12-04 1993-04-06 Interlego A.G. Toy brick collector
DE9109809U1 (de) * 1991-08-07 1991-10-31 Wessel-Werk GmbH & Co. KG, 5226 Reichshof Aktive Staubsaugerdüse
DE4411526A1 (de) * 1994-04-02 1995-10-05 Fedag Romanshorn Fa Saugreinigungsgerät
FI1987U1 (fi) * 1995-01-30 1995-07-06 Sisko Tuulikki Mussalo Hjaelputrustning vid dammsugare
US5632060A (en) * 1995-08-04 1997-05-27 Bissell Inc. Vacuum cleaner with agitation member drive belt access panel
US5664285A (en) * 1996-01-11 1997-09-09 Black & Decker Inc. Vacuum cleaner with combined filter element and collection unit
US5671499A (en) * 1996-01-11 1997-09-30 Black & Decker Inc. Vacuum cleaner with all components in floor traveling head
US6012200A (en) * 1997-01-10 2000-01-11 Royal Appliance Mfg. Co. Upright vacuum cleaner
US6226832B1 (en) 1998-04-23 2001-05-08 Matsushita Home Appliance Corporation Of America Easy maintenance vacuum cleaner
US6209168B1 (en) 1998-11-30 2001-04-03 Royal Appliance Mfg. Co. Combination brushroll and nozzle inlet control mechanism
US6317920B1 (en) 1998-11-30 2001-11-20 Royal Appliance Mfg. Co. Vacuum cleaner with above-floor cleaning tool
US6269518B1 (en) 1999-12-08 2001-08-07 Shell Electric Mfg. (Holdings) Co. Ltd. Bagless vacuum cleaner
US6484350B2 (en) 1999-12-08 2002-11-26 Shell Electric Mfg. (Holdings) Co. Ltd. Bagless canister vacuum cleaner
US6530106B1 (en) * 2000-02-24 2003-03-11 Bruns Brush, Inc. (Ohio Corporation) Vacuum sweeper roller brush
RU2302809C2 (ru) * 2002-12-06 2007-07-20 Тектроник Индастриз Кампани Лимитид Насадка для мусороуборочной машины вакуумного действия
US7117556B2 (en) * 2003-05-08 2006-10-10 Nicholas Gerald Grey Surface cleaning apparatus
US6760952B1 (en) 2003-06-20 2004-07-13 The Scott Fetzer Company Vacuum cleaner brushroll
US7571509B2 (en) * 2004-04-22 2009-08-11 Euro-Pro Operating, Llc Surface cleaning apparatus
EP2394553B1 (en) 2006-05-19 2016-04-20 iRobot Corporation Removing debris from cleaning robots

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US1904974A (en) * 1931-12-17 1933-04-18 Hoover Co Suction cleaner
US2079405A (en) * 1935-01-26 1937-05-04 Birtman Electric Co Suction cleaner
US2297209A (en) * 1937-08-21 1942-09-29 Geduhn Walter Polishing apparatus
US2343227A (en) * 1939-08-23 1944-02-29 Hoover Co Suction cleaner
US2513587A (en) * 1944-11-20 1950-07-04 Gen Motors Corp Vacuum cleaner brush drive
GB734864A (en) * 1952-12-05 1955-08-10 Truvox Ltd Improvements in or relating to mechanically operated floor treatment machines

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US1611684A (en) * 1922-09-23 1926-12-21 United Electric Company Rotary drive for vacuum cleaners
US1829582A (en) * 1928-12-31 1931-10-27 Electric Vacuum Cleaner Co Vacuum cleaner
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US1904974A (en) * 1931-12-17 1933-04-18 Hoover Co Suction cleaner
US2079405A (en) * 1935-01-26 1937-05-04 Birtman Electric Co Suction cleaner
US2297209A (en) * 1937-08-21 1942-09-29 Geduhn Walter Polishing apparatus
US2343227A (en) * 1939-08-23 1944-02-29 Hoover Co Suction cleaner
US2513587A (en) * 1944-11-20 1950-07-04 Gen Motors Corp Vacuum cleaner brush drive
GB734864A (en) * 1952-12-05 1955-08-10 Truvox Ltd Improvements in or relating to mechanically operated floor treatment machines

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE42155E1 (en) * 2002-08-12 2011-02-22 Tacony Corporation Light-weight self-propelled vacuum cleaner
US7150068B1 (en) * 2002-08-12 2006-12-19 Gary Dean Ragner Light-weight self-propelled vacuum cleaner
USRE43455E1 (en) * 2002-08-12 2012-06-12 Tacony Corporation Light-weight self-propelled vacuum cleaner
WO2004016145A1 (en) * 2002-08-14 2004-02-26 S. C. Johnson & Son, Inc. Disposable dust receptacle
US20040031111A1 (en) * 2002-08-14 2004-02-19 Jose Porchia Disposable dust receptacle
US7908705B2 (en) 2003-08-26 2011-03-22 Bissell Homecare, Inc. Bare floor cleaner
US7823250B2 (en) 2003-08-26 2010-11-02 Bissell Homecare, Inc. Bare floor cleaner
US20080092325A1 (en) * 2003-08-26 2008-04-24 Bissell Homecare, Inc. Bare floor cleaner
US7571513B2 (en) * 2006-06-06 2009-08-11 Sam Kim Carpet cleaner with pressed-down suction
US20070277344A1 (en) * 2006-06-06 2007-12-06 Sam Kim Carpet cleaner with pressed-down suction
WO2017106900A1 (en) * 2015-12-22 2017-06-29 Run The Race Pty Ltd Improved vacuum head attachment and vacuum cleaner
EP3393323A4 (en) * 2015-12-22 2019-08-14 Run The Race Pty Ltd IMPROVED SUPPLEMENT FOR VACUUM CLEANERS AND VACUUM CLEANERS
AU2016374644B2 (en) * 2015-12-22 2021-07-29 Run The Race Pty Ltd Improved vacuum head attachment and vacuum cleaner
WO2018127680A1 (en) * 2017-01-09 2018-07-12 Dyson Technology Limited Cleaner head for a vacuum cleaner
US20180192836A1 (en) * 2017-01-09 2018-07-12 Dyson Technology Limited Cleaner head for a vacuum cleaner
CN108283463A (zh) * 2017-01-09 2018-07-17 戴森技术有限公司 用于真空吸尘器的清洁器头

Also Published As

Publication number Publication date
NL134452C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB1173011A (en) 1969-12-03
CH448408A (de) 1967-12-15
DE1628726A1 (de) 1971-08-12
DE1628725A1 (de) 1971-08-12
DE1628724A1 (de) 1971-08-12
FR1511867A (fr) 1968-02-02
NL6702322A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1967-08-21
US3482276A (en) 1969-12-09
FR1511866A (fr) 1968-02-02
NL6702378A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1967-08-21

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