US3853086A - Device for signalling need for cleaning or replacing suction cleaner dust bag - Google Patents

Device for signalling need for cleaning or replacing suction cleaner dust bag Download PDF

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Publication number
US3853086A
US3853086A US00331116A US33111673A US3853086A US 3853086 A US3853086 A US 3853086A US 00331116 A US00331116 A US 00331116A US 33111673 A US33111673 A US 33111673A US 3853086 A US3853086 A US 3853086A
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United States
Prior art keywords
piston
dust collector
passageway
set forth
signal device
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Expired - Lifetime
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US00331116A
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English (en)
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I Asplund
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Electrolux AB
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Electrolux AB
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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
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/19—Means for monitoring filtering operation
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/14—Bags or the like; Rigid filtering receptacles; Attachment of, or closures for, bags or receptacles
    • A47L9/1427—Means for mounting or attaching bags or filtering receptacles in suction cleaners; Adapters

Definitions

  • ABSTRACT PP 331,116 In a vacuum cleaner employing a removable dust collector, a device for signalling or indicating when such [30] Foreign Application Priority Data dust collector should be removed to be cleaned or re- F b 11 1972 S d 1636 72 placed by a new dust collector.
  • the signalling device can be observed at such time to determine the need to clean or replace 56 R f d the dust collector before the vacuum cleaner is con- 1 e erences l e nected to a source of electrical supply.
  • FIG. 1 A first figure.
  • This invention relates to a signalling device for a vacuum cleaner having a dust collector and a piston which is movable in dependence on a pressure difierence, one end of the piston being connected with the inlet side of the dust collector and the other end thereof being connected with the outlet side of the dust collector.
  • the pressure difference between the inlet and the outlet sides of the dust collector is used to move the piston a distance corresponding to the magnitude of the pressure difference.
  • the pressure difference has reached such a magnitude that the piston has moved to a position indicating that such replacement of the dust collector should be done.
  • the motor-fan unit of the vacuum cleaner is not in opera tion, no such pressure difference will occur and the piston will remain in an initial position.
  • the purpose of this invention is to remove the abovementioned drawbacks and to provide a signalling device by which an indication of the degree of filling of the dust collector is obtained also when the vacuum cleaner is not in operation.
  • the signalling device is generally characterized by a blocking device by which the piston, after movement thereof, is retained in the position reached; and by another device which automatically releases the blocking device when the dust collector is made accessible so that it can be replaced.
  • connection between one end of the piston and the inlet side of the dust collector is provided by a channel having a filter and a chamber,
  • the dust collector 8 comprises a filter 7 in the form of a bag fabricated from air permeable material like paper, for example, and a mounting plate 6 having an opening 5.
  • the open end of the bag 7 is fixed to the plate 6 which serves as an end cover for the dust collector.
  • the mounting plate 6 is detachably mounted in position in the space 12 against wall members therein, as shown in FIG. 1, with the tubular member 13 projecting through the opening 5 in the mounting plate 6.
  • a sealing ring 14 which is in air-tight sealing relation with the mounting plate 6.
  • a signalling device embodying the invention is mounted in the front end cover 10.
  • the device comprises a cylinder 17 formed of transparent material like plastic, for example, and a piston 18 which moves in the cylinder. In both ends of the piston seals 19 are provided.
  • a spring 24 is secured to the piston 18 and to a part 25 of the end cover 10. The spring tends to move the piston 18 to its initial position shown in FIG. 2.
  • the piston has a projection 26 extending into a groove 27 in a stationary sleeve 28.
  • the end cover 10 has a sight glass 29 formed of transparent material like plastic, for example. Through the sight glass and the transparent cylinder 17 the position the latter having a leakageopening to the ambient.
  • FIG. 1 is across sectional view of a signalling device embodying the invention taken on line 1'-l of FIG. 2.
  • FIG. 2 is a longitudinal sectional view taken on line 2-2 of FIG. 10 To illustrate the device as clearly as possible, FIG. 2 illustrates details at different longitudinal sections. In FIGS. 1 and 2 corresponding details are referred to by the same reference numerals.
  • a front end cover 10 of a vacuum cleaner 9 is shown, only a portion of the casing 11 of the vacuum cleaner being illustrated.
  • the front end cover 10 is formed with a central opening 16 at which of the piston 18 can be seen.
  • suitable indicia or markings 18' are provided at the outside of the piston 18. These markings may be in the form of figures or other symbols or areas having different colors.
  • the piston 18 has grooves or recesses 30 coacting with a blocking device, which comprises a wire spring 31 whose one end extends towards the grooves of the piston through an opening 32 in the cylinder 17.
  • the grooves have elled surfaces 33.
  • the wire spring 31 is attached to a bracket 34 which, by a shaft 35, is pivotally joumalled inside the end cover 10.
  • the bracket 34 has an arm 36 which in the position shown in FIG. 1 abuts a stop 37 attached to the region a hollow tubular member 13 extends inward therefrom.
  • a suction hose (not shown) is adapted to be casing 11. In this position, which the arm 36 assumes when space 12 in casing 11 is closed by the front end cover 10, the wire spring 31 is in engagement with the grooves 30 of the piston 18.
  • the arm 36 becomes free and the bracket 34 moves away from the piston 18 by the action of a spring 38.
  • the left end of the cylinder 17 is connected to a channel 39.
  • the channel 39- communicates via another channel 3% with that part of the space 12 of casing 111 which is outside the dust collector.
  • the right-hand end of the cylinder 17 has a channel 40 which communicates with another channel 41.
  • the channel 41 is made in a thick wall part 42 of-a cover 43, which is placed near the signalling device.
  • the channel 41 communicates with an annular channel 44 disposed about the tubular member 13 and having an annular filter 45.
  • the signalling device is in communication with the suction passageway 15 through the filter 45 and another passageway 46.
  • the purpose of the filter 45 is to prevent dust from penetrating into the cylinder 17. If this should happen the friction of the piston 18 against the inner surface of the cylinder 17 could be changed substantially so that incorrect indications would occur. Further, dust could enter into the grooves 30 of the piston and cause an unsatisfactory function of the blocking device. It is however also important in a device of this type to prevent the filter 45 from becoming clogged by dust, which would considerably change the pressure conditions in the channels 44 and 41.
  • a chamber 47 is arranged between the filter 45 and the passageway 46, the chamber 47 communicating with the ambient by a leakage opening 48.
  • the diameter selected for the leakage opening 48 is as small as possible considering the fact that the pressure in the chamber 47 must always be a little greater than the pressure at the opening of the passageway 46 in the suction passageway 15.
  • the vacuum cleaner there will continuously be a small flow of air through the leakage opening 48 into the chamber 47 and through the passageway 46 to the suction passageway 15.
  • dust from the suction passageway 15 cannot enter the chamber 47.
  • this pressure will form a reference pressure in the chamber 47 and will not have any influence on the function of the signalling device since the latter all the time operates as a comparing device with respect to the pressures in the suction passageway 15 and in the space 12 of casing 11 outside the dust collector. Pressure changes in the suction passageway 15 will thus influence unambiguously the pressure in the chamber 47 but the air passing through the filter 45 to the signalling device will all of the time come from the leakage opening 48.
  • a signal device for a vacuum cleaner having a mo tor-fan unit, a suction opening and a dust collector adjacent thereto operatively connected to said motor-fan unit comprising: a passageway having a transparent portion, means connecting one end of said passageway to the inlet side of said dust collector and means connecting the other end of said passageway to the outlet side of said dust collector, a piston movable at least in the'transparent portion of said passageway in dependance upon the pressure difference between said'inlet and outlet sides of said dust collector to indicate the amount of accumulation of material in said dust collector, a blocking device co-acting with saidpiston to retain thepiston in the position reached after movement in one direction in said passageway, and means connected to said blocking device for automatically releasing the latter from said piston when the dust collector is made accessible for exchange.
  • a signal device as set forth in claim 2 further comprising a bracket having said wire spring thereon, and an openable cover closing the dust collector of the apparatus, said bracket being pivotally arranged on said cover whereby when said cover is opened said wire spring is moved out of said selected groove.
  • a signal device as set forth in claim 3 further comprising another spring which urges said wire spring to a position away from said piston when said cover is opened and to a position abutting said piston when said cover is closed.
  • a signal device as set forth in claim 1 further comprising a resilient means operatively connected to said piston which nonnally urges said piston to its initial position, but subject to the action of said blocking device.
  • connection means between one end of said passageway and the inlet side of the dust collector is provided with a channel having a filter for the passage of air to said piston.
  • a signal device as set forth in claim 1 further comprising indicia on an outer surface of said piston which is visible through said transparent passageway of the device.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
  • Electric Suction Cleaners (AREA)
US00331116A 1972-02-11 1973-02-09 Device for signalling need for cleaning or replacing suction cleaner dust bag Expired - Lifetime US3853086A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE01636/72A SE362784B (enrdf_load_stackoverflow) 1972-02-11 1972-02-11

Publications (1)

Publication Number Publication Date
US3853086A true US3853086A (en) 1974-12-10

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Application Number Title Priority Date Filing Date
US00331116A Expired - Lifetime US3853086A (en) 1972-02-11 1973-02-09 Device for signalling need for cleaning or replacing suction cleaner dust bag

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US (1) US3853086A (enrdf_load_stackoverflow)
JP (1) JPS5730496B2 (enrdf_load_stackoverflow)
GB (1) GB1381237A (enrdf_load_stackoverflow)
SE (1) SE362784B (enrdf_load_stackoverflow)

Cited By (33)

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Publication number Priority date Publication date Assignee Title
US3934543A (en) * 1974-12-23 1976-01-27 Sherwood Products Corporation Apparatus for monitoring the condition of a filter
US4100878A (en) * 1975-12-05 1978-07-18 Aktiebolaget Electrolux Vacuum cleaner dust container filling indicator device
US5461368A (en) * 1994-01-11 1995-10-24 Comtech Incorporated Air filter monitoring device in a system using multispeed blower
US20070069680A1 (en) * 2004-01-28 2007-03-29 Landry Gregg W Debris Sensor for Cleaning Apparatus
US20080134457A1 (en) * 2005-02-18 2008-06-12 Irobot Corporation Autonomous surface cleaning robot for dry cleaning
US20100011529A1 (en) * 2006-05-19 2010-01-21 Chikyung Won Removing debris from cleaning robots
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
US20110185895A1 (en) * 2010-02-03 2011-08-04 Paul Freen Filter apparatus and method of monitoring filter apparatus
US8239992B2 (en) 2007-05-09 2012-08-14 Irobot Corporation Compact autonomous coverage robot
US8368339B2 (en) 2001-01-24 2013-02-05 Irobot Corporation Robot confinement
US8374721B2 (en) 2005-12-02 2013-02-12 Irobot Corporation Robot system
US8380350B2 (en) 2005-12-02 2013-02-19 Irobot Corporation Autonomous coverage robot navigation system
US8386081B2 (en) 2002-09-13 2013-02-26 Irobot Corporation Navigational control system for a robotic device
US8382906B2 (en) 2005-02-18 2013-02-26 Irobot Corporation Autonomous surface cleaning robot for wet cleaning
US8390251B2 (en) 2004-01-21 2013-03-05 Irobot Corporation Autonomous robot auto-docking and energy management systems and methods
US8387193B2 (en) 2005-02-18 2013-03-05 Irobot Corporation Autonomous surface cleaning robot for wet and dry cleaning
US8396592B2 (en) 2001-06-12 2013-03-12 Irobot Corporation Method and system for multi-mode coverage for an autonomous robot
US8412377B2 (en) 2000-01-24 2013-04-02 Irobot Corporation Obstacle following sensor scheme for a mobile robot
US8417383B2 (en) 2006-05-31 2013-04-09 Irobot Corporation Detecting robot stasis
US8428778B2 (en) 2002-09-13 2013-04-23 Irobot Corporation Navigational control system for a robotic device
US8463438B2 (en) 2001-06-12 2013-06-11 Irobot Corporation Method and system for multi-mode coverage for an autonomous robot
US8474090B2 (en) 2002-01-03 2013-07-02 Irobot Corporation Autonomous floor-cleaning robot
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
US8594840B1 (en) 2004-07-07 2013-11-26 Irobot Corporation Celestial navigation system for an autonomous robot
US8600553B2 (en) 2005-12-02 2013-12-03 Irobot Corporation Coverage robot mobility
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
CN112228259A (zh) * 2020-10-21 2021-01-15 马鞍山市常立发机械制造有限公司 一种农业机械用柴油机导风装置

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DE9010969U1 (de) * 1990-07-24 1991-11-28 Siemens AG, 8000 München Anzeigevorrichtung für den Füllgrad eines in einem Staubsauger eingesetzten Filterbeutels
DE4244141C2 (de) * 1992-12-24 1996-06-13 Aeg Hausgeraete Gmbh Druckanzeiger für Staubsauger

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US3119369A (en) * 1960-12-28 1964-01-28 Ametek Inc Device for indicating fluid flow
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US3381652A (en) * 1965-10-21 1968-05-07 Nat Union Electric Corp Visual-audible alarm for a vacuum cleaner
US3587515A (en) * 1968-09-17 1971-06-28 Electrolux Ab Pressure differential indicating means
US3678882A (en) * 1971-05-28 1972-07-25 Nat Union Electric Corp Combination alarm and filter bypass device for a suction cleaner

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US3934543A (en) * 1974-12-23 1976-01-27 Sherwood Products Corporation Apparatus for monitoring the condition of a filter
US4100878A (en) * 1975-12-05 1978-07-18 Aktiebolaget Electrolux Vacuum cleaner dust container filling indicator device
US5461368A (en) * 1994-01-11 1995-10-24 Comtech Incorporated Air filter monitoring device in a system using multispeed blower
US8478442B2 (en) 2000-01-24 2013-07-02 Irobot Corporation Obstacle following sensor scheme for a mobile robot
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US8800107B2 (en) 2010-02-16 2014-08-12 Irobot Corporation Vacuum brush
CN112228259A (zh) * 2020-10-21 2021-01-15 马鞍山市常立发机械制造有限公司 一种农业机械用柴油机导风装置

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GB1381237A (en) 1975-01-22
SE362784B (enrdf_load_stackoverflow) 1973-12-27
JPS5730496B2 (enrdf_load_stackoverflow) 1982-06-29
JPS4891861A (enrdf_load_stackoverflow) 1973-11-29

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