US1286321A - Brush. - Google Patents

Brush. Download PDF

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Publication number
US1286321A
US1286321A US12454516A US12454516A US1286321A US 1286321 A US1286321 A US 1286321A US 12454516 A US12454516 A US 12454516A US 12454516 A US12454516 A US 12454516A US 1286321 A US1286321 A US 1286321A
Authority
US
United States
Prior art keywords
brush
flange
shaft
bristles
parts
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
US12454516A
Inventor
Howard Earl Hoover
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.)
HOOVER SUCTION SWEEPER Co
Original Assignee
HOOVER SUCTION SWEEPER CO
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 HOOVER SUCTION SWEEPER CO filed Critical HOOVER SUCTION SWEEPER CO
Priority to US12454516A priority Critical patent/US1286321A/en
Application granted granted Critical
Publication of US1286321A publication Critical patent/US1286321A/en
Priority to US35783020 priority patent/USRE16585E/en
Priority to DEH81610D priority patent/DE366609C/en
Priority to FR519115A priority patent/FR519115A/en
Priority to NL16467A priority patent/NL12368C/xx
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00Details 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
    • A47L9/02Nozzles
    • A47L9/04Nozzles with driven brushes or agitators
    • A47L9/0461Dust-loosening tools, e.g. agitators, brushes
    • A47L9/0466Rotating tools
    • A47L9/0477Rolls
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00Details 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
    • A47L9/02Nozzles
    • A47L9/04Nozzles with driven brushes or agitators
    • A47L9/0455Bearing means therefor

Definitions

  • vacuum cleaners and means for mounting the saine and associating a thread guard therewith.
  • Fig. ⁇ 3 is a cross section on the line--S Fig. 4t is a detail section on the line 4-4 of F ig.' 3; L
  • Fig. 5 is an end view of the brush and a, portion of the mounting means with parts broken away.
  • Fig. 6 is a detail cross section through the end of the brush and associated parts.
  • A is the casing or hood of a vacuum sweeper., in the nozzle or open mouth of which the brush is to be placed.
  • the brush consists of a body B which 4is here shown and preferably is hollow.
  • lt has enlarged ends C C and a shaft D which passes throughl vthe hollow body.
  • th@ shaft passes.4
  • These bearing ⁇ sleeves are secured in position in any desired manner and they preferably project at each end a little beyond the outer surface 0fv the enlarged body ends C. This is only said to indicate that other features of the invention are not to be restricted to use in connection with the hollow7 body.
  • a thread guard F which is cup-shaped. lt overhangs and includes the outer end of the body and is perforated at H H so as tof pern'iit air to pass inwardly through .the bottoni of such cupshaped thread guard and then outwardly Vthrough the edge of the end of the body as indicated by the arrow' in Fig. 2.
  • the parts are so arranged that the thread guard when secured on the shaft, as for example by the threads at G, the brush is pre vented from longitudinal movement while being free to rotate on the shaft.
  • rFhe parts are also so arranged that the bottoni of the cup shaped thread guard is spaced from ,the end of the body end thus leaving the air channel and space above referred to.
  • the end of the brush body takes the form of a flange C1 with a depression C2 thereabout.
  • the recess or depression C2 serves as a kind of recepj tacle or reservoir to hold hair, thread, films, and the like. @ne of its edges may be beveled as indicated in Fig. 6.
  • the brush body is provided with a series of bosses projecting therefrom, and in this case arranged in the form of spirals. This reduces the labor of making the recesses into whichthe bunches of brush bristles have to be inserted for each boss is cast or formed integralwith the body so that it is in the proper position and relation.. When the boss is recessed radially the brush bristles, if inserted in such recesses, will project out' wardly in the proper manner.
  • Each boss is provided ⁇ with a side ⁇ perforation and of course there may be one or inore, or they may be arranged in any desired manner, through which the securing wire or twine is inserted.
  • bristles are arranged so as to effectually sweep practically the entire surface area included between the ends of the mouth or inlet and particularly the bristles next to the central driving pulley J are set so as to overhang the pulley face.
  • the arrangement most effectively prevents the parts from displacement or injury or from being forced into inoperative relations. Cases and frames with which such brushes are vco1ninonly used are not infrequently made of light material capable of abundant giving and changing shape subject to blows.
  • object. of my invention is to mount my brush on the shaft in such way that it will not respond to or be injured by variations in the shape and form of the case support or frame.
  • shaft and brush In the structure shown the shaft and brush always maintain their parallelism and their bearing surfaces are never cramped, twisted or shifted with reference to each other.
  • the bosses in addition to the other functional results ascribed to their-use, call for a minimum of material but they are only the preferred form.
  • the centering point in the course of manufacture can be marked on the bosses so as to leave no uncertainty as to the point Where the recess is to be made in order that the bristles may be in the right position.
  • the brush device when as in the illustration provided with val shaft whose ends project can be mounted in any desired manner the shaft being rotatably or otherwise supported in the frame 1or case. In either event, the brush body is free to rotate on the shaft.
  • the brush when its parts vare assembled with the thread guard at the end can be inserted as a complete device in any Vith such a structure the air underproper conditions is fee to move 'inwardly along the brush to keep thread,
  • the thread, hair and the like is prevented from entering the space about the bearing by means of the depression and the llange and such thread, hair and the like is forced out of the space around the bearing by means of the inwardly drawn current of air.
  • the brush body be hollow or not and whatever may be the shaft arrangement is uniting the bearings with the brush body so as to get them permanently and rigidly mounted in proper relation and alinement; This is particula-rly important where a high speed brush such as that to which my improvements refer is to be mounted in a thin, light or yielding frame or case such as those usually employed in vacuum sweepers or cleaners.
  • a brush device comprising a rotatable brush body provided with a flange on its end,'a narrow circumferential groove adjacent the ange and a cup-shaped thread guard over-hanging such groove.
  • a brush device comprising a rotatable brushbody provided with a flange on its end, a. narrow circumferential groove adjacent the flange and a cup-shaped thread gua-rd overhanging such groove, that side of the groove opposite the flange being beveled.
  • a brush device comprising a rotatable brush body provided with a flange on its end, a narrow circumferential groove adjacent the flange Vand a cup-shaped thread guard overhanging such groove, said eupshaped guard spaced from the flange so as to leave an annular opening between them.
  • a brush device comprising a rotatable brush body provided with a flange on its end, a narrow circumferential groove adjacent the flange and a cup-shaped thread guard overhanging such groove, that side of the groove opposite the flange being beveled, said cup-shaped ⁇ guard spaced from the ange so as to leave an annular opening between them.

Description

H. E. HOOVER.
` BRUSH. APPLICATION FILED OCT. 9II9I5.
Patented. D00. 3, IQIS.
' Leanser.
HOWABDVERL HOOVER, OF CHICAGO, VILILJINOIS, ASSFGNOR TO HOOVER SUC'I'ION SWEEPER COMPANY, OF NEW BERLIN, OHIO, A CORPORATION 0F OHIO.
BRUSH.
Specification of Letters Patent.
Ll n." l 4 Patented Dec. 3, initd.
vacuum cleaners and means for mounting the saine and associating a thread guard therewith.
Thebrush as applied to a vacuum cleaner in one form is illustrated in the accompanying drawings'wherein Figure 1 is a plan view with parts removed; Fig. 2 is a vertical section on the line 25-2 of Fig. l;
Fig. `3 is a cross section on the line--S Fig. 4t is a detail section on the line 4-4 of F ig.' 3; L
Fig. 5 is an end view of the brush and a, portion of the mounting means with parts broken away.
Fig. 6 is a detail cross section through the end of the brush and associated parts.
Like parts are indicated by the sarne letter n all the figures. l
A is the casing or hood of a vacuum sweeper., in the nozzle or open mouth of which the brush is to be placed. The brush consists of a body B which 4is here shown and preferably is hollow. lt has enlarged ends C C and a shaft D which passes throughl vthe hollow body.' In each end of the bodyA is a bearing sleeve E through which th@ shaft passes.4 These bearing` sleeves are secured in position in any desired manner and they preferably project at each end a little beyond the outer surface 0fv the enlarged body ends C. This is only said to indicate that other features of the invention are not to be restricted to use in connection with the hollow7 body.
yllhe ends of the shaft D are secured or supported in any desired manner in the frame. l j
Un each end of the shaft- Whatever may be 'its structure is mounted a thread guard F which is cup-shaped. lt overhangs and includes the outer end of the body and is perforated at H H so as tof pern'iit air to pass inwardly through .the bottoni of such cupshaped thread guard and then outwardly Vthrough the edge of the end of the body as indicated by the arrow' in Fig. 2. The parts are so arranged that the thread guard when secured on the shaft, as for example by the threads at G, the brush is pre vented from longitudinal movement while being free to rotate on the shaft. rFhe parts are also so arranged that the bottoni of the cup shaped thread guard is spaced from ,the end of the body end thus leaving the air channel and space above referred to. On the preferred -form of my device the end of the brush body takes the form of a flange C1 with a depression C2 thereabout. The recess or depression C2 serves as a kind of recepj tacle or reservoir to hold hair, thread, films, and the like. @ne of its edges may be beveled as indicated in Fig. 6.
The brush body is provided with a series of bosses projecting therefrom, and in this case arranged in the form of spirals. This reduces the labor of making the recesses into whichthe bunches of brush bristles have to be inserted for each boss is cast or formed integralwith the body so that it is in the proper position and relation.. When the boss is recessed radially the brush bristles, if inserted in such recesses, will project out' wardly in the proper manner. Each boss is provided` with a side `perforation and of course there may be one or inore, or they may be arranged in any desired manner, through which the securing wire or twine is inserted. rllhis wire or twine passes between the bristles in the proper manner and out and thence to the next boss where in like manner it serves t0. secure the vnentset of bristles. bristles are arranged so as to effectually sweep practically the entire surface area included between the ends of the mouth or inlet and particularly the bristles next to the central driving pulley J are set so as to overhang the pulley face. Speaking gen-v erally of the entire, structure the arrangement most effectively prevents the parts from displacement or injury or from being forced into inoperative relations. Cases and frames with which such brushes are vco1ninonly used are not infrequently made of light material capable of abundant giving and changing shape subject to blows. One
The bosses, and therefore the- `suitable casing.
object. of my invention, therefore, is to mount my brush on the shaft in such way that it will not respond to or be injured by variations in the shape and form of the case support or frame. In the structure shown the shaft and brush always maintain their parallelism and their bearing surfaces are never cramped, twisted or shifted with reference to each other.
It will be understood that I do not wish to confine myself to the particular form, size, arrangement or shape of the several parts, or to the simultaneous use of all of them. Some of them may be dispensed with `without, departin lfrom the spirit of my invention, and su stitutes may be employed in lieu of others. I wish my drawings to be taken as in a sense diagrammatic intending only to suggest the general principles of my invention.
The bosses in addition to the other functional results ascribed to their-use, call for a minimum of material but they are only the preferred form. The centering point in the course of manufacture can be marked on the bosses so as to leave no uncertainty as to the point Where the recess is to be made in order that the bristles may be in the right position. I have shown the bristles as secured by wire and suggest that they might be secured by twine and that they could alsobe secured in any desired manner and the parts thus could be'made of any desired material. If the bristles were secured in the recesses of the bosses by other vmeans than wire or twine the lateral perforations in the bosses could be dispensed with.
The use and operation of my invention are sufliciently suggested by the description, of the form illustrated but a further statement of the matter is` prepared.
The brush device when as in the illustration provided with val shaft whose ends project can be mounted in any desired manner the shaft being rotatably or otherwise supported in the frame 1or case. In either event, the brush body is free to rotate on the shaft. The brush when its parts vare assembled with the thread guard at the end can be inserted as a complete device in any Vith such a structure the air underproper conditions is fee to move 'inwardly along the brush to keep thread,
hair and the like from getting'at the brush bearings. This action is further aided by the depression next to the end flange on the brush body/L This depression and flange also t'end to prevent the entrance of hair and the like in the space about the bearing.
Thus in the preferred fomn of the device the thread, hair and the like is prevented from entering the space about the bearing by means of the depression and the llange and such thread, hair and the like is forced out of the space around the bearing by means of the inwardly drawn current of air. Aspreviously suggested, an important feature of my invention whether' the brush body be hollow or not and whatever may be the shaft arrangement is uniting the bearings with the brush body so as to get them permanently and rigidly mounted in proper relation and alinement; This is particula-rly important where a high speed brush such as that to which my improvements refer is to be mounted in a thin, light or yielding frame or case such as those usually employed in vacuum sweepers or cleaners.
I claim:
l. A brush device comprising a rotatable brush body provided with a flange on its end,'a narrow circumferential groove adjacent the ange and a cup-shaped thread guard over-hanging such groove.
Q. A brush device comprising a rotatable brushbody provided with a flange on its end, a. narrow circumferential groove adjacent the flange anda cup-shaped thread gua-rd overhanging such groove, that side of the groove opposite the flange being beveled.
3. A brush device comprising a rotatable brush body provided with a flange on its end, a narrow circumferential groove adjacent the flange Vand a cup-shaped thread guard overhanging such groove, said eupshaped guard spaced from the flange so as to leave an annular opening between them.
.4. A brush device comprising a rotatable brush body provided with a flange on its end, a narrow circumferential groove adjacent the flange and a cup-shaped thread guard overhanging such groove, that side of the groove opposite the flange being beveled, said cup-shaped `guard spaced from the ange so as to leave an annular opening between them.
In testimony whereof, I allix my signature in the presence of two witnesses this 22nd day of September, 1916.
'HOWARD EARL Hoeven.
Witnesses z* MINNIE M. LINDENAU, RUTH E. CAnLsoN.
US12454516A 1916-10-09 1916-10-09 Brush. Expired - Lifetime US1286321A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US12454516A US1286321A (en) 1916-10-09 1916-10-09 Brush.
US35783020 USRE16585E (en) 1916-10-09 1920-02-11 Suction sweeper
DEH81610D DE366609C (en) 1916-10-09 1920-07-01 vacuum cleaner
FR519115A FR519115A (en) 1916-10-09 1920-07-06 Improvements to vacuum cleaning devices
NL16467A NL12368C (en) 1916-10-09 1920-09-13

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12454516A US1286321A (en) 1916-10-09 1916-10-09 Brush.

Publications (1)

Publication Number Publication Date
US1286321A true US1286321A (en) 1918-12-03

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Family Applications (2)

Application Number Title Priority Date Filing Date
US12454516A Expired - Lifetime US1286321A (en) 1916-10-09 1916-10-09 Brush.
US35783020 Expired USRE16585E (en) 1916-10-09 1920-02-11 Suction sweeper

Family Applications After (1)

Application Number Title Priority Date Filing Date
US35783020 Expired USRE16585E (en) 1916-10-09 1920-02-11 Suction sweeper

Country Status (4)

Country Link
US (2) US1286321A (en)
DE (1) DE366609C (en)
FR (1) FR519115A (en)
NL (1) NL12368C (en)

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2729266A1 (en) * 1977-06-29 1979-01-18 Duepro Ag CLEANING DEVICE
US4222146A (en) * 1978-12-29 1980-09-16 Samuel Hertzberg Vacuum cleaners
US5193243A (en) * 1989-12-26 1993-03-16 The Scott Fetzer Company Brushroll
US5272785A (en) * 1989-12-26 1993-12-28 The Scott Fetzer Company Brushroll
US5435038A (en) * 1994-03-10 1995-07-25 Sauers; Carl B. Brush roller assembly for vacuum cleaner sweeper
US5465451A (en) * 1989-12-26 1995-11-14 The Scott Fetzer Company Brushroll
US6314611B1 (en) 2000-03-24 2001-11-13 Baker Mcmillen Co. Bladed disk brush roller assembly for a vacuum cleaner sweeper
US9811089B2 (en) 2013-12-19 2017-11-07 Aktiebolaget Electrolux Robotic cleaning device with perimeter recording function
US9939529B2 (en) 2012-08-27 2018-04-10 Aktiebolaget Electrolux Robot positioning system
US9946263B2 (en) 2013-12-19 2018-04-17 Aktiebolaget Electrolux Prioritizing cleaning areas
US10045675B2 (en) 2013-12-19 2018-08-14 Aktiebolaget Electrolux Robotic vacuum cleaner with side brush moving in spiral pattern
US10149589B2 (en) 2013-12-19 2018-12-11 Aktiebolaget Electrolux Sensing climb of obstacle of a robotic cleaning device
US10209080B2 (en) 2013-12-19 2019-02-19 Aktiebolaget Electrolux Robotic cleaning device
US10219665B2 (en) 2013-04-15 2019-03-05 Aktiebolaget Electrolux Robotic vacuum cleaner with protruding sidebrush
US10231591B2 (en) 2013-12-20 2019-03-19 Aktiebolaget Electrolux Dust container
US10433697B2 (en) 2013-12-19 2019-10-08 Aktiebolaget Electrolux Adaptive speed control of rotating side brush
US10448794B2 (en) 2013-04-15 2019-10-22 Aktiebolaget Electrolux Robotic vacuum cleaner
US10499778B2 (en) 2014-09-08 2019-12-10 Aktiebolaget Electrolux Robotic vacuum cleaner
US10518416B2 (en) 2014-07-10 2019-12-31 Aktiebolaget Electrolux Method for detecting a measurement error in a robotic cleaning device
US10534367B2 (en) 2014-12-16 2020-01-14 Aktiebolaget Electrolux Experience-based roadmap for a robotic cleaning device
US10617271B2 (en) 2013-12-19 2020-04-14 Aktiebolaget Electrolux Robotic cleaning device and method for landmark recognition
US10678251B2 (en) 2014-12-16 2020-06-09 Aktiebolaget Electrolux Cleaning method for a robotic cleaning device
US10729297B2 (en) 2014-09-08 2020-08-04 Aktiebolaget Electrolux Robotic vacuum cleaner
US10877484B2 (en) 2014-12-10 2020-12-29 Aktiebolaget Electrolux Using laser sensor for floor type detection
US10874274B2 (en) 2015-09-03 2020-12-29 Aktiebolaget Electrolux System of robotic cleaning devices
US10874271B2 (en) 2014-12-12 2020-12-29 Aktiebolaget Electrolux Side brush and robotic cleaner
US11099554B2 (en) 2015-04-17 2021-08-24 Aktiebolaget Electrolux Robotic cleaning device and a method of controlling the robotic cleaning device
US11122953B2 (en) 2016-05-11 2021-09-21 Aktiebolaget Electrolux Robotic cleaning device
US11169533B2 (en) 2016-03-15 2021-11-09 Aktiebolaget Electrolux Robotic cleaning device and a method at the robotic cleaning device of performing cliff detection
US11474533B2 (en) 2017-06-02 2022-10-18 Aktiebolaget Electrolux Method of detecting a difference in level of a surface in front of a robotic cleaning device
US11921517B2 (en) 2017-09-26 2024-03-05 Aktiebolaget Electrolux Controlling movement of a robotic cleaning device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2918687A (en) * 1956-11-23 1959-12-29 Bissell Carpet Sweeper Co Rotary brush assembly for carpet sweepers

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4173807A (en) * 1977-06-29 1979-11-13 Dupro Ag Cleaning implement
DE2729266A1 (en) * 1977-06-29 1979-01-18 Duepro Ag CLEANING DEVICE
US4222146A (en) * 1978-12-29 1980-09-16 Samuel Hertzberg Vacuum cleaners
US5193243A (en) * 1989-12-26 1993-03-16 The Scott Fetzer Company Brushroll
US5272785A (en) * 1989-12-26 1993-12-28 The Scott Fetzer Company Brushroll
US5373603A (en) * 1989-12-26 1994-12-20 The Scott Fetzer Company Brushroll
US5465451A (en) * 1989-12-26 1995-11-14 The Scott Fetzer Company Brushroll
US5598600A (en) * 1989-12-26 1997-02-04 The Scott Fetzer Company Brushroll
US5435038A (en) * 1994-03-10 1995-07-25 Sauers; Carl B. Brush roller assembly for vacuum cleaner sweeper
US6314611B1 (en) 2000-03-24 2001-11-13 Baker Mcmillen Co. Bladed disk brush roller assembly for a vacuum cleaner sweeper
US9939529B2 (en) 2012-08-27 2018-04-10 Aktiebolaget Electrolux Robot positioning system
US10219665B2 (en) 2013-04-15 2019-03-05 Aktiebolaget Electrolux Robotic vacuum cleaner with protruding sidebrush
US10448794B2 (en) 2013-04-15 2019-10-22 Aktiebolaget Electrolux Robotic vacuum cleaner
US10433697B2 (en) 2013-12-19 2019-10-08 Aktiebolaget Electrolux Adaptive speed control of rotating side brush
US10149589B2 (en) 2013-12-19 2018-12-11 Aktiebolaget Electrolux Sensing climb of obstacle of a robotic cleaning device
US10209080B2 (en) 2013-12-19 2019-02-19 Aktiebolaget Electrolux Robotic cleaning device
US9811089B2 (en) 2013-12-19 2017-11-07 Aktiebolaget Electrolux Robotic cleaning device with perimeter recording function
US10045675B2 (en) 2013-12-19 2018-08-14 Aktiebolaget Electrolux Robotic vacuum cleaner with side brush moving in spiral pattern
US9946263B2 (en) 2013-12-19 2018-04-17 Aktiebolaget Electrolux Prioritizing cleaning areas
US10617271B2 (en) 2013-12-19 2020-04-14 Aktiebolaget Electrolux Robotic cleaning device and method for landmark recognition
US10231591B2 (en) 2013-12-20 2019-03-19 Aktiebolaget Electrolux Dust container
US10518416B2 (en) 2014-07-10 2019-12-31 Aktiebolaget Electrolux Method for detecting a measurement error in a robotic cleaning device
US10499778B2 (en) 2014-09-08 2019-12-10 Aktiebolaget Electrolux Robotic vacuum cleaner
US10729297B2 (en) 2014-09-08 2020-08-04 Aktiebolaget Electrolux Robotic vacuum cleaner
US10877484B2 (en) 2014-12-10 2020-12-29 Aktiebolaget Electrolux Using laser sensor for floor type detection
US10874271B2 (en) 2014-12-12 2020-12-29 Aktiebolaget Electrolux Side brush and robotic cleaner
US10534367B2 (en) 2014-12-16 2020-01-14 Aktiebolaget Electrolux Experience-based roadmap for a robotic cleaning device
US10678251B2 (en) 2014-12-16 2020-06-09 Aktiebolaget Electrolux Cleaning method for a robotic cleaning device
US11099554B2 (en) 2015-04-17 2021-08-24 Aktiebolaget Electrolux Robotic cleaning device and a method of controlling the robotic cleaning device
US10874274B2 (en) 2015-09-03 2020-12-29 Aktiebolaget Electrolux System of robotic cleaning devices
US11712142B2 (en) 2015-09-03 2023-08-01 Aktiebolaget Electrolux System of robotic cleaning devices
US11169533B2 (en) 2016-03-15 2021-11-09 Aktiebolaget Electrolux Robotic cleaning device and a method at the robotic cleaning device of performing cliff detection
US11122953B2 (en) 2016-05-11 2021-09-21 Aktiebolaget Electrolux Robotic cleaning device
US11474533B2 (en) 2017-06-02 2022-10-18 Aktiebolaget Electrolux Method of detecting a difference in level of a surface in front of a robotic cleaning device
US11921517B2 (en) 2017-09-26 2024-03-05 Aktiebolaget Electrolux Controlling movement of a robotic cleaning device

Also Published As

Publication number Publication date
NL12368C (en) 1925-01-15
FR519115A (en) 1921-06-04
USRE16585E (en) 1927-04-05
DE366609C (en) 1923-01-05

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