US3457575A - Sweeper for carpeted and smooth floors - Google Patents

Sweeper for carpeted and smooth floors Download PDF

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Publication number
US3457575A
US3457575A US597962A US3457575DA US3457575A US 3457575 A US3457575 A US 3457575A US 597962 A US597962 A US 597962A US 3457575D A US3457575D A US 3457575DA US 3457575 A US3457575 A US 3457575A
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US
United States
Prior art keywords
brush
sweeper
brushes
coupling
floor
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
US597962A
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English (en)
Inventor
Gunter Bienek
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.)
Bissell Inc
Original Assignee
Bissell Inc
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
Priority claimed from DEB64612U external-priority patent/DE1936632U/de
Priority claimed from DE1965B0064726 external-priority patent/DE1937324U/de
Application filed by Bissell Inc filed Critical Bissell Inc
Application granted granted Critical
Publication of US3457575A publication Critical patent/US3457575A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • 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
    • A47L11/4075—Handles; levers
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B13/00—Brushes with driven brush bodies or carriers
    • A46B13/001—Cylindrical or annular brush bodies
    • 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
    • A47L11/32—Carpet-sweepers
    • A47L11/33—Carpet-sweepers having means for storing dirt
    • 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
    • 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
    • A47L11/4041—Roll shaped surface treating 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
    • 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
    • A47L11/4063—Driving means; Transmission means therefor
    • A47L11/4066—Propulsion of the whole machine
    • 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
    • A47L11/4063—Driving means; Transmission means therefor
    • A47L11/4069—Driving or transmission means for the cleaning tools

Definitions

  • the coupling means may include springs wound about the brush axle, bail operated levers or unidirectional clutches.
  • the brushes are formed with bristles disposed angularly to the brush core surface.
  • This invention relates to a sweeper for carpeted and smooth oors, and more particularly to an improved sweeper utilizing continuous unidirectional sweeping action of the rotary brush means.
  • sweepers of the type mentioned above have not been when used on smooth floors. The action was such that most dust and debris resisted being swept into the sweeper pan.
  • the present invention solves the aforementioned and other problems, and provides a sweeper usable on both carpeted and smooth floors, and which is substantially more efcient than prior constructions.
  • the sweeper brush is mounted to sweep in a single direction toward its pan at all times, regardless of the direction of translation of the sweeper over the floor.
  • a pair of rotary brushes are disposed adjacent a pair of dust pans, with each brush contructed and mounted to rotate freely over the floor in one direction and to be poitively driven in the same direction upon reversal of sweeper action.
  • the free vs. driven action of each brush is reversed relative to the other brush.
  • the direction of rotation of either brush is always toward its respective dust pan.
  • the brushes used in the illustrated embodiments comprise a core in which is secured a plurality of brush bristles and which extend outwardly therefrom.
  • the bristles are disposed at an angle to the circumferential surface of the core, and are thus at an angle to a pure radial direction. Upon rotation of such a brush over a surface, the bristles act to positively flick dust and dirt into the adjacent pan with a snapping action.
  • FIG. l is a generally central vertical sectional view of a sweeper, showing a rst embodiment of the invention.
  • FIG. 2 is a generally horizontal sectional view of the sweeper of FIGURE 1;
  • FIG, 3 is a broken side elevation of the connecting web
  • FIG. 4 is a fragmentary side elevation of the brush used in the sweeper of the invention.
  • FIG. 5 is a sectional view of the brush action during leftward sweeper movement
  • FIG. 6 is a sectional view of the brush action during rightward sweeper movement
  • FIG. 7 is a view similar to FIG. 1, showing a, second embodiment of the invention.
  • FIG. 8 is a View similar to FIG. 2 showing the second embodiment
  • FIG. 9 is a fragmentary sectional view of a sweeper showing a third embodiment of the invention.
  • FIG. 10 is an enlarged edge elevation of the clutch means of FIG. 9;
  • FIG. 11 is a side view of a clutch disc
  • FIG. 12 is a view somewhat similar to FIG. 1, showing another embodiment of the invention.
  • the carpet sweeper includes a housing comprising side walls 1 and a suitable cover plate 2 disposed therebetween and forming a top portion 3 and end wall portions 4. If desired, rubber bumpers 5 may be secured to end wall portions 4 to protect furniture.
  • Side walls 1 and cover plate 2 may be made of any suitable material, including injection molded plastic.
  • a central web 6 extends across the sweeper between and is suitably secured to walls 1.
  • Each end of web 6 is provided with a T-slot 7 (see FIG. 3) which receives a screw 8 and tightening nut 9.
  • the outer end of each screw 8 is threadably received in a bore 10 formed centrally of the respective side wall 1.
  • a pair of spaced rotatable sweeper brushes 11 and 12 are mounted within the housing, with each brush being disposed closely adjacent end wall portions 4. Each brush is xedly m-ounted on an axle 13, 14 mounted in suitable' bores in side walls 1.
  • a suitable brush core 15, 16 forms part of each assembly, with a plurality of groups of bristles 17, 18 secured therein, as will be described in greater detail hereinafter.
  • Axle 13 is provided with a coupling means, such as wheel 19 disposed between each outer brush end and the respective side wall 1.
  • axle 14 is provided with a coupling wheel 20 disposed between each outer brush and the respective side wall. Both pairs of wheels are freely rotatable on their respective axles. Wheels 19 and 20 are continuously engaged and driven by two pairs of sweeper drive wheels 21, 22 which support the sweeper on the surface for reciprocating translation thereover. Drive wheels 21, 22 are xedly mounted on respective rotatable axles 23, 24 which are suitably disposed in openings 25 in side walls 1.
  • Frictional engagement means are provided between adjacent coupling and drive wheels. As shown in the drawings, the frictional engagement means comprises a rubber-like surface layer 26 on coupling wheels 19 and a similar layer 27 on drive wheels 21. If desired, the friction layer could be disposed on all drive wheels and/or on all coupling wheels without departing from the spirit of the invention.
  • Brushes 11 and 12 are adapted to sweep dust and debris from the surface of a iloor 28 into suitable receptacles.
  • a pair of dust pans 29, 30 are disposed between the brushes and are pivotally mounted on drive wheel axles 23, 24 respectively.
  • Pans 29 and 30 are provided with a closed floor, but are open at the top and along the side facing the* respective brush. An inclined lip 31 on the open side of each respective pan assists the adjacent brush in its sweeping action.
  • Pans 29 and 3) are held in normally closed position by a plurality of springs 32 which are mounted in suitable notches 33 in web 6 (see FIG. 3) and which extend fore or aft, as the case may be, and which engage pins 34 disposed on the ends of the pans. When the pans are closed, they may bear against rubber cushion means 35 secured to web 6.
  • a vertically movable dump button 36 extends through the top portion 3 of cover plate 2, and has a two-legged spring 37 secured thereto.
  • the spring leg ends are suitably mounted in notches 38 in oneI end portion of pans 29 and 30.
  • brushes 11 and 12 are so constructed and controlled so that they continuously rotate in one direction only and thus sweep dirt and the like into their respective pans at all times, regardless of the direction or change of direction of translation of the sweeper over a floor surface.
  • each brush is adapted to rotate freely in one direction so that contact of the bristles 17 or 18 with floor 28 during translation will cause the brush to sweep into its respective pan.
  • the direction of permissible free rotation for one brush is, however, oppositeI to the direction of free rotation for the other brush.
  • brush 11 will rotate freely in counterclockwise direction during leftward sweeper translation
  • brush 12 will rotate freely in a clockwise direction during rightward sweeper translation.
  • a coil spring 39 is circumferentially wrapped counterclockwise about each end portion of brush axle 13 and is held in place within the bore in side wall 1.
  • a second coil spring 40 is similarly wrapped counterclockwise about axle 13 inwardly from each spring 39, and is held in place within a bore in freely rotatable coupling wheel 19 with one spring end engaging the wheel as shown in FIGURE 1.
  • Clockwise wrapped coil springs 41 and 42 are similarly mounted about axle 14.
  • the sweeper disclosed herein also includes an improved action by virtue of the brushes utilized.
  • groups of bristles 17, 18 are mounted in their respective cores 15, 16 at an angle to a radial direction and angularly to the' circumferential core surface.
  • FIG. 5 shows the action of the bristles during free counterclockwise rotation of a brush 11 over a oor 28.
  • the bristle group 17 touching floor 28 is mounted in core 15 and extends downwardly so that it engages the floor generally behind a vertical plane 43 containing the longitudinal core axis.
  • FIG. 6 shows the action during positive drive of the brush when the direction of sweeper movement has been reversed.
  • the bristle groups extend downwardly and are deflected so that they engage the floor generally ahead of plane 43.
  • the brush resists rotation in its normal direction, thus assisting the positive drive described above and increasing the flicking action.
  • the bristle groups shown in FIG. 4 are arranged in spiral fashion and staggered.
  • the groups could also be arranged in series, or in any other suitable way.
  • FIGS. 7 and 8 show a second embodiment of a sweeper which is generally similar to that shown in FIGS. 1 and 2, with the exception that the bail 44 is utilized to couple and uncouple the positive driving means.
  • coupling wheels 45, 46 are iixedly mounted on brush axles 13 and 14 respectively. Wheels 45 and 46 are adapted to be selectively engaged and driven by drive wheels 47, 48, which are in turn mounted on axles 49, 50 which extend into enlarged openings 51 in side walls 1.
  • a lever 52 is disposed closely adjacent each side wall 1 forwardly of the central web, and has a cam 53 on its rearward end and an arm 54 on its forward end. The lever is pivoted, as at 55 to side walls 1.
  • a similar lever 56 is disposed rearwardly of the central web, is pivoted at 57, and has a similar cam 58 and arm 59. Each pair of opposed levers is actuated by the inner end 60 of bail 44 which is disposed for longitudinal sliding movement in a slot 61 in side walls 1.
  • FIGS. 9-11 show a construction with a sweeper having clutch means wherein a toothed coupling disc 62 is secured to the loosely mounted coupling wheel 63, and a similar disc 64 is secured to the end of 5 brush 11.
  • Discs 62 and 64 may be made of plastic for noiseless operation and have slightly flexible teeth which mutually engage for driving purposes upon one directlon of relative rotation, but which slide over each other in the other rotative direction.
  • any dirt and debris not picked up by the forward brush in a given stroke will be picked up and swept into the pan by the rearward brush on the same stroke. Occasionally, the rearward brush will not pick up the missed debris. This rearward brush will, nevertheless, tend to sweep the debris toward the forward brush. This debris is, in effect, trapped between brushes so that it will be picked up upon reversal of reciprocation.
  • FIG. l2 shows a structure wherein two brushes 65, 66 are disposed between pans 67, 68. Brushes 65 and 66 are constructed and mounted similarly to the brushes in the previously described embodiments, with a resultant uni-directional rotation toward their respective pans, in both directions of sweeper translation.
  • the present invention provides a unique concept for sweeping carpeted or smooth-surfaced oors.
  • a oor sweeper comprising:
  • each said brush being mounted to Contact and freely rotate on the iloor in a direction to deliver dust to its corresponding dust receiving area upon translation of the sweeper in a corresponding direction
  • said dust pan means comprising a separate pan for each brush, and means for simultaneously pivoting said pans to a selective open or closed position.
  • each said brush to rotate unidirectionally toward said dust pan means in a generally continuous sweeping action upon both fore and aft reciprocating translation of said sweeper over the oor, said last-named means comprising:
  • mounting means positioning each said brush for free rotation thereof, on the floor caused by contact with the floor when said sweeper is translated in one direction
  • each said brush comprises:
  • each said brush is constructed and mounted so as to resist free rotation on smooth floors when the sweeper is translated in the direction to cause positive driving of the brush.
  • sweeper for carpeted and smooth-surfaced floors comprising:
  • Zc means mounting said drive wheel for movement relative to said coupling Wheel for engagement or disengagement of the wheels
  • said dust pan means comprising a separate pan for each brush, with said pans being spaced apart and with said brushes disposed therebetween.

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  • Nozzles For Electric Vacuum Cleaners (AREA)
  • Brushes (AREA)
  • Cleaning Of Streets, Tracks, Or Beaches (AREA)
  • Motor Or Generator Current Collectors (AREA)
US597962A 1965-12-23 1966-11-30 Sweeper for carpeted and smooth floors Expired - Lifetime US3457575A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DEB64612U DE1936632U (de) 1965-12-23 1965-12-23 Teppichkehrer.
DEB0085112 1965-12-23
DEB0085216 1965-12-31
DE1965B0064726 DE1937324U (de) 1965-12-31 1965-12-31 Buerstenwalze fuer kehrgeraete und kehrmaschinen.

Publications (1)

Publication Number Publication Date
US3457575A true US3457575A (en) 1969-07-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
US597962A Expired - Lifetime US3457575A (en) 1965-12-23 1966-11-30 Sweeper for carpeted and smooth floors

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US (1) US3457575A (ar)
BE (1) BE691643A (ar)
CH (1) CH457749A (ar)
DE (2) DE1503746B1 (ar)
DK (1) DK126085B (ar)
ES (1) ES334857A1 (ar)
FR (1) FR1505219A (ar)
GB (1) GB1104598A (ar)
LU (1) LU52641A1 (ar)
NL (1) NL141082B (ar)

Cited By (53)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3602932A (en) * 1969-07-14 1971-09-07 Bissell Inc Floor sweeper with improved drive coupling
US3879788A (en) * 1971-12-07 1975-04-29 Cousin Cie Ets A & M Freres Mechanical sweeper
US4084283A (en) * 1976-12-17 1978-04-18 Bissell, Inc. Floor sweeper
US4325156A (en) * 1980-12-04 1982-04-20 Bissell, Inc. Floor sweeper with improved construction
US4357727A (en) * 1980-12-04 1982-11-09 Bissell, Inc. Dual brush floor sweeper
US6574823B1 (en) 2001-02-12 2003-06-10 The Scott Fetzer Company Brushroll
US20040049877A1 (en) * 2002-01-03 2004-03-18 Jones Joseph L. Autonomous floor-cleaning robot
US6760952B1 (en) 2003-06-20 2004-07-13 The Scott Fetzer Company Vacuum cleaner brushroll
US20040187249A1 (en) * 2002-01-03 2004-09-30 Jones Joseph L. Autonomous floor-cleaning robot
US20050011028A1 (en) * 2003-07-18 2005-01-20 Yasuda Technology (Holdings) Limited Motorised floor sweeper
US7155308B2 (en) 2000-01-24 2006-12-26 Irobot Corporation Robot obstacle detection system
US20070244610A1 (en) * 2005-12-02 2007-10-18 Ozick Daniel N Autonomous coverage robot navigation system
US7332890B2 (en) 2004-01-21 2008-02-19 Irobot Corporation Autonomous robot auto-docking and energy management systems and methods
US20080052846A1 (en) * 2006-05-19 2008-03-06 Irobot Corporation Cleaning robot roller processing
US20080084174A1 (en) * 2001-01-24 2008-04-10 Irobot Corporation Robot Confinement
US7388343B2 (en) 2001-06-12 2008-06-17 Irobot Corporation Method and system for multi-mode coverage for an autonomous robot
US7389156B2 (en) 2005-02-18 2008-06-17 Irobot Corporation Autonomous surface cleaning robot for wet and dry cleaning
US20080150466A1 (en) * 2004-01-28 2008-06-26 Landry Gregg W Debris Sensor for Cleaning Apparatus
US7430455B2 (en) 2000-01-24 2008-09-30 Irobot Corporation Obstacle following sensor scheme for a mobile robot
US7441298B2 (en) 2005-12-02 2008-10-28 Irobot Corporation Coverage robot mobility
US20080276407A1 (en) * 2007-05-09 2008-11-13 Irobot Corporation Compact Autonomous Coverage Robot
US20080292748A1 (en) * 2007-05-25 2008-11-27 Sapporo Breweries Limited Process for production of an effervescent alcoholic beverage
US7620476B2 (en) 2005-02-18 2009-11-17 Irobot Corporation Autonomous surface cleaning robot for dry cleaning
US20100037418A1 (en) * 2005-12-02 2010-02-18 Irobot Corporation Autonomous Coverage Robots
US20100082193A1 (en) * 2004-07-07 2010-04-01 Mark Joseph Chiappetta Celestial navigation system for an autonomous vehicle
US7706917B1 (en) 2004-07-07 2010-04-27 Irobot Corporation Celestial navigation system for an autonomous robot
US7761954B2 (en) 2005-02-18 2010-07-27 Irobot Corporation Autonomous surface cleaning robot for wet and dry cleaning
US20110000030A1 (en) * 2007-12-21 2011-01-06 Philippe Pichon Apparatus for cleaning a submerged surface including a brushing device driven by members for driving the apparatus on the submerged surface
US8374721B2 (en) 2005-12-02 2013-02-12 Irobot Corporation Robot system
US8382906B2 (en) 2005-02-18 2013-02-26 Irobot Corporation Autonomous surface cleaning robot for wet cleaning
US8386081B2 (en) 2002-09-13 2013-02-26 Irobot Corporation Navigational control system for a robotic device
US8396592B2 (en) 2001-06-12 2013-03-12 Irobot Corporation Method and system for multi-mode coverage for an autonomous robot
US8417383B2 (en) 2006-05-31 2013-04-09 Irobot Corporation Detecting robot stasis
US8515578B2 (en) 2002-09-13 2013-08-20 Irobot Corporation Navigational control system for a robotic device
US8584305B2 (en) 2005-12-02 2013-11-19 Irobot Corporation Modular robot
JP2013255660A (ja) * 2012-06-12 2013-12-26 Kao Corp 清掃具
US8634960B2 (en) 2006-03-17 2014-01-21 Irobot Corporation Lawn care robot
US8781626B2 (en) 2002-09-13 2014-07-15 Irobot Corporation Navigational control system for a robotic device
US8780342B2 (en) 2004-03-29 2014-07-15 Irobot Corporation Methods and apparatus for position estimation using reflected light sources
US8788092B2 (en) 2000-01-24 2014-07-22 Irobot Corporation Obstacle following sensor scheme for a mobile robot
US8800107B2 (en) 2010-02-16 2014-08-12 Irobot Corporation Vacuum brush
US8930023B2 (en) 2009-11-06 2015-01-06 Irobot Corporation Localization by learning of wave-signal distributions
US9008835B2 (en) 2004-06-24 2015-04-14 Irobot Corporation Remote control scheduler and method for autonomous robotic device
US9420741B2 (en) 2014-12-15 2016-08-23 Irobot Corporation Robot lawnmower mapping
US9510505B2 (en) 2014-10-10 2016-12-06 Irobot Corporation Autonomous robot localization
US9516806B2 (en) 2014-10-10 2016-12-13 Irobot Corporation Robotic lawn mowing boundary determination
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US9554508B2 (en) 2014-03-31 2017-01-31 Irobot Corporation Autonomous mobile robot
US10021830B2 (en) 2016-02-02 2018-07-17 Irobot Corporation Blade assembly for a grass cutting mobile robot
US10459063B2 (en) 2016-02-16 2019-10-29 Irobot Corporation Ranging and angle of arrival antenna system for a mobile robot
US20210212546A1 (en) * 2020-01-15 2021-07-15 Lisa Lloyd Roller mop assembly
US11115798B2 (en) 2015-07-23 2021-09-07 Irobot Corporation Pairing a beacon with a mobile robot
US11470774B2 (en) 2017-07-14 2022-10-18 Irobot Corporation Blade assembly for a grass cutting mobile robot

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SE441724B (sv) * 1984-03-16 1985-11-04 Agergard Goesta Yngve Borste med roterbar borstaxel och anvendning av sadan borste vid en borstvals
DE4141802C2 (de) * 1991-12-18 1996-01-11 Leifheit Ag Kehrmaschine
DE10145205C1 (de) * 2001-09-13 2003-04-17 Georg Hefter Maschb Walzenbürste

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US688189A (en) * 1900-06-21 1901-12-03 Francis C Mason Sweeping-machine.
GB251174A (en) * 1925-10-15 1926-04-29 Charles James Harvey Improvements in sweeping appliances
US1886950A (en) * 1931-10-20 1932-11-08 Unique Mfg Company Inc Sweeper
FR1123147A (fr) * 1954-04-28 1956-09-18 Balai mécanique-ramasse poussières combiné en aspirateur
US3092862A (en) * 1961-11-15 1963-06-11 William A Sherbondy Hand carpet sweeper construction

Cited By (177)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3602932A (en) * 1969-07-14 1971-09-07 Bissell Inc Floor sweeper with improved drive coupling
US3879788A (en) * 1971-12-07 1975-04-29 Cousin Cie Ets A & M Freres Mechanical sweeper
US4084283A (en) * 1976-12-17 1978-04-18 Bissell, Inc. Floor sweeper
US4325156A (en) * 1980-12-04 1982-04-20 Bissell, Inc. Floor sweeper with improved construction
US4357727A (en) * 1980-12-04 1982-11-09 Bissell, Inc. Dual brush floor sweeper
US8761935B2 (en) 2000-01-24 2014-06-24 Irobot Corporation Obstacle following sensor scheme for a mobile robot
US8412377B2 (en) 2000-01-24 2013-04-02 Irobot Corporation Obstacle following sensor scheme for a mobile robot
US8788092B2 (en) 2000-01-24 2014-07-22 Irobot Corporation Obstacle following sensor scheme for a mobile robot
US9446521B2 (en) 2000-01-24 2016-09-20 Irobot Corporation Obstacle following sensor scheme for a mobile robot
US20090055022A1 (en) * 2000-01-24 2009-02-26 Irobot Corporation Obstacle following sensor scheme for a mobile robot
US7155308B2 (en) 2000-01-24 2006-12-26 Irobot Corporation Robot obstacle detection system
US8565920B2 (en) 2000-01-24 2013-10-22 Irobot Corporation Obstacle following sensor scheme for a mobile robot
US8478442B2 (en) 2000-01-24 2013-07-02 Irobot Corporation Obstacle following sensor scheme for a mobile robot
US7430455B2 (en) 2000-01-24 2008-09-30 Irobot Corporation Obstacle following sensor scheme for a mobile robot
US9144361B2 (en) 2000-04-04 2015-09-29 Irobot Corporation Debris sensor for cleaning apparatus
US8659256B2 (en) 2001-01-24 2014-02-25 Irobot Corporation Robot confinement
US9167946B2 (en) 2001-01-24 2015-10-27 Irobot Corporation Autonomous floor cleaning robot
US20080084174A1 (en) * 2001-01-24 2008-04-10 Irobot Corporation Robot Confinement
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GB1104598A (en) 1968-02-28
DE1457024A1 (de) 1968-12-12
NL6618047A (ar) 1967-06-26
NL141082B (nl) 1974-02-15
BE691643A (ar) 1967-05-29
FR1505219A (fr) 1967-12-08
DE1503746B1 (de) 1970-01-22
LU52641A1 (ar) 1967-02-20
CH457749A (de) 1968-06-15
DK126085B (da) 1973-06-12
ES334857A1 (es) 1968-03-01

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