US3279418A - 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
US3279418A
US3279418A US471879A US47187965A US3279418A US 3279418 A US3279418 A US 3279418A US 471879 A US471879 A US 471879A US 47187965 A US47187965 A US 47187965A US 3279418 A US3279418 A US 3279418A
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United States
Prior art keywords
dust bag
air
seat
pressure differential
valve
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
US471879A
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English (en)
Inventor
Nilsson Bengt Erik
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.)
Electrolux AB
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Electrolux AB
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Publication date
Application filed by Electrolux AB filed Critical Electrolux AB
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Publication of US3279418A publication Critical patent/US3279418A/en
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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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/03—Vacuum cleaner

Definitions

  • My invention relates to suction cleaners of the kind which employ a removable dust bag or dirt collector, and it is an object of the invention to provide an improved device for automatically signaling or indicating when such a dust bag should be removed to be cleaned or replaced by a new dust bag.
  • the signaling or indicating device may be provided with a manually operable control which is readily accessible at the exterior of the suction cleaner and can be adjusted to produce a signal or indication when the pressure differential at the opposing sides of the dust bag is extremely small or very great.
  • the control also may be operatively connected with the device so that it will become ineffective to produce a signal or indication when the pressure differential at opposing sides of the dust bag increases due to dust and dirt collected in the dust bag.
  • the casing 10 includes an apertured end wall 14 which is fixed thereto in any suitable manner and with which the front end cover 11 coacts when it is moved to its closed position illustrated in the drawing.
  • a space 15 within the casing 10, which is located adjacent to the end wall 14, is adapted to receive a dust bag or dirt collecting member 16.
  • the dust bag 16 comprises a filter 17, which may be formed of fabric or paper or other suitable material which is permeable to air, and a part 18 of annular form which is fixed to the bag at its open end.
  • the part 18, which may be ringshaped and serves as a reinforcement, is formed with an outwardly extending flange to which is fixed a gasket or sealing member 19 formed of an elastomeric material like rubber, for example.
  • the front end cover 11 is formed with a central opening 20 at which region a hollow tubular member 21 extends inward therefrom.
  • a suction hose (not shown) is adapted to be removably connected to the tubular member 21 in any suitable manner. Dirt laden air is drawn 3,279,418 Patented Oct. 18, 1966 ice through the suction hose into the interior of the casing 10 by a motor-fan unit (not shown) which may be located adjacent to the dirt collecting member 16.
  • the inside of the front end cover 11 is provided with wall members of annular form respectively defining a hollow passage 22 adjacent to the tubular member 21 and cavity or recess 23 disposed adjacent to the passage 22.
  • the front end cover 11 further includes a substantially flat apertured plate 24 which is detachably connected in any suitable manner (not shown) to the wall members therein.
  • the plate 24 may be formed with a central opening 24a in alignment with and abutting the inner open end of the tubular member 21 and include a ring-shaped outer peripheral section 24b.
  • the end wall 14 is formed with a lip or flange 25 which is of annular form and defines an access opening 26 into the space 15.
  • the front end cover 11 functions to close the access opening 26 and also effectively hold the gasket 19 between the end wall 14 and the ring-shaped outer peripheral section 24b of the plate 24.
  • I in order to indicate when the dirt collecting member 16 should be cleaned or replaced by a new dirt collecting member, I provide a device 27 which automatically is rendered operable responsive to a predetermined pressure differential at opposite sides of the dust bag 16 to produce a signal or other suitable indication.
  • the device 27 is associated with the front end cover 11 and forms a unitary part thereof.
  • the signaling device 27 comprises a member 28 which is formed of elastomeric material, such as rubber or soft plastic, for example, which includes an inner section 28a which serves as a diaphragm and overlies the inner end of the passage 22, and an outer section 28b which overlies the open end of the cavity or recess 23 and may be referred to as a tab which projects radially outward from the diaphragm 28a.
  • a member 28 which is formed of elastomeric material, such as rubber or soft plastic, for example, which includes an inner section 28a which serves as a diaphragm and overlies the inner end of the passage 22, and an outer section 28b which overlies the open end of the cavity or recess 23 and may be referred to as a tab which projects radially outward from the diaphragm 28a.
  • the elastomeric member 28 is clamped against the inner end of the passage 22 and the open end of the cavity 23 by the plate 24.
  • a member 29 is disposed in the passage 22 and is axially movable therein toward and from the diaphragm 28a which functions as a movable valve member.
  • the member 29 comprises a hollow sleeve 30 which is in threaded engagement with the wall of the passage 22, as indicated at 31, and is formed with an internal shoulder 32 intermediate its ends, the parts of the sleeve at the left and right of the shoulder 32 being of different diameters.
  • a flange 33 extends radially outward from the periphery of the sleeve 30 at the narrow diameter end thereof, such flange being axially spaced from the threaded section of the sleeve to form a recess 34 in which a sealing ring 35 is disposed to provide an air-tight seal between the wall of the passage 22 and the outer periphery of the sleeve 30.
  • a control knob 36 projects axially outward from the narrow diameter end of the sleeve 30 and may be provided with a suitable finger grip (not shown) to facilitate turning the member 29 so that the sleeve can be move-d axially toward and from the diaphragm 28a.
  • a metal reed 39 is held against the shoulder 32 by the open end of the cavity 38 of the cup-shaped element 37.
  • the closed end of the cupshaped element 37 is formed with a central opening 41 and -a lip 42 which is disposed about the opening and serves as a seat for the diaphragm or movable valve member 28a.
  • the plate 24 is formed with an opening 43 in which a member 44 is axially movable, the member 44 :being in threaded engagement with the wall of the opening 43 at 45.
  • the member 44 essentially serves as a screw and may be formed with a slot 44 at its outer or righthand end so that it is axially adjustable within the opening 43 toward and from the diaphragm 28a when the front end cover 11 is moved to an open position from its illustrated closed position.
  • a smaller screw 46 is in threaded engagement at 47 within an opening in the member 44, the screw 46 being provided with a slot at 46 at its outer or right-hand end so that it can be axially adjusted within the member 44 when the front cover 11 is moved to an open position from its illustrated closed position.
  • the diaphragm 28a is biased against the seat 42 by a helical spring 49, one end of which bears against the diaphragm 28a and the opposite end of which bears against an external shoulder 50 at the outer periphery of the member 44.
  • the tubular member 21 is formed with a passage 51 so that a space 52 formed between the closed end of the cup-shaped member 37 and the diaphragm 28a, when the latter closes the passageway or opening 41, is substantially at the same pressure as the pressure within the dust bag 16.
  • the pressure in the space 52, at the left side of the diaphgrarn 28a will be the same as the pressure existing within the dust bag 16 at the side thereof which is initially contacted by the air.
  • the outer tab 28b of the elastomeric member 28 is formed with a hollow sleeve 53 which extends through an opening in the plate 24 and communicates with an opening 54 in the end wall 14 when the front end cover 11 is in its closed position illustrated in the drawing.
  • a passageway is provided so that the space 55 at the right side of the diaphragm 28a, between the diaphragm and the plate 24, is substantially at the same pressure as the pressure in the space -15 at the outer surface of the dust bag 16.
  • This passageway from the space 15 to the space 55 includes the hollow sleeve 53, cavity 23, an opening 56 in the tab 28b, and a radially extending groove 57 at the left side of the plate 24 which is directly opposite the opening 56 and at its inner end communicates with the space 55.
  • the diaphragm or valve member 28a is biased and urged against the seat 42 by the helical spring 49 which is disposed between the diaphragm 28a and the screw member 44 which can be axially moved within the opening 43 in the plate 24 to adjust the initialtension of the spring 49.
  • the smaller screw 46 axially movable within the larger screw member 44 functions to limit the distance the member 29 can be moved toward the right in the drawing by the control knob 36.
  • the smaller screw 46 serves as a stop to limit axial movement of the member 29 toward the right in the drawing.
  • the smaller screw screw 46 can be adjusted to such a position that the control knob 36 can be moved between first and second positions to regulate the pressure differential at the opposite sides of the diaphragm 28a at which the diaphragm will move toward the right from the seat 42 and allow air to flow through the passageway or opening 41 to render the metal reed 39 operable to (produce an audible sound.
  • the diaphragm 28a can be rendered operable to move toward the right from its seat 42 and open the passageway 41 responsive to a slight pressure differential between the opposing sides of the dust bag 16.
  • the diaphragm 28a is rendered operable to move from the seat 42 and open the passageway 41 responsive to an increasingly greater pressure differential between the opposing sides of the dust bag 16.
  • the larger screw 44 can be moved axially in the opening 43 of the plate 24 to initially adjust the tension of the spring 49 and the pressure differential range in which the control device 27 will function responsive to movement of the control knob 36 between its first or initial position and its second or final position referred to above.
  • the smaller screw 46 which functions as a stop to limit axial movement of the member 29, can be so positioned axially with respect to the member 29 that, when the control knob 36 has been moved to its second or final osition or slightly past it, t e diaphragm 28a will be locked and clamped between the seat 42 and the iner or lefthand end of the smaller screw 46. Under these operating conditions, the control device 27 will be rendered inoperable and the metal reed 39 will be ineffective to produce an audible response irrespective of the pressure differential produced between the opposing sides of the dust bag 16.
  • the screws 44 and 46 permit certain preliminary adjustments to be made when the suction cleaner is being fabricated to compensate for manufacturing tolerances of the different components of the control device 27.
  • all suction cleaners embodying the control device 27 will function more or less in substantially the same way in the field to indicate to a user under substantially the same ble sound but also may be employed to actuate a switch in an electrical circuit to produce a visual sgnal or to dis- .connect the suction cleaner motor from the source of electrical supply to indicate the need for cleaning or replacing a dust bag. Therefore, I intend in the following claims to cover all modifications which do not depart from the spirit and scope of my invention.
  • a suction cleaner of the class described having a casing provided with an inlet and outlet for air adapted to flow therethrough and a dust bag therein for removing dirt from the air, the pressure differential at opposite sides of said dust bag becoming increasingly greater responsive to dirt trapped at the side thereof initially contacted by the air, the combination of a device for indicating the need for cleaning or replacing the dust bag due to dirt trapped therein, said device producing such indication with the aid of air and including a member which has a passageway therein and defines a valve seat, valve means movable toward and from said seat for controlling flow of air for operating said device, means responsive to a pressure differential at opposite sides of said dust bag to move said valve means from said seat for effecting flow of air through said passageway to render said device operable to produce said indication, mean for mounting said member for movement in a path of movement toward and from said valve means to shift the position of said valve seat with respect to said valve means, and means accessible at the exterior of said casing for manually moving said member toward and from said valve mean to adjust the position of said valve seat
  • a suction cleaner of the class described having a casing provided with an inlet and outlet for air adapted to flow therethrough and a dust bag therein for removing dirt from the air, the pressure differential at opposite sides of said dust bag becoming increasingly greater responsive to dirt trapped at the side thereof initially contacted by the air, the combination of a device for indicating the need for cleaning or replacing the dust bag due to dirt trapped therein, said device producing such indication with the aid of air and including a member which has a passageway therein and defines a valve seat, valve means movable toward and from said seat for controlling flow of air for operating said device, means responsive to a pressure differential at opposite sides of said dust bag to move said valve means from said seat for effecting flow of air through said passageway to render said device operable to produce said indication, said member being movable toward and from said valve means, means for imparting movement to said member toward and from said valve means to regulate the pressure differential at opposite sides of said dust bag at which said device is rendered operable to produce said indication, said casing being provided with an end cover having an
  • a device for indicating the need for cleaning or replacing the dust bag due to dirt trapped therein said device producing such indication with the aid of air and including a member which has a passageway therein and defines a valve seat, valve means movable toward and from said seat for controlling flow of air for operating said device, means responsive to a pressure differential at opposite sides of said dust bag to move said valve means from said seat for effecting flow of air through said passageway to render said device operable to produce said indication, said member being movable toward and from said valve means, means for imparting movement to said member toward and from said valve means to regulate the pressure differential at opposite sides of said dust bag at which said device is rendered operable to produce said indication, resilient means for biasing said valve means toward said seat,
  • a device for indicating the need for cleaning or replacing the dust bag due to dirt trapped therein said device producing such indication with the aid of air and including a member which has a passageway therein and defines a valve seat, valve means movable toward and from said seat for controlling flow of air for operating said device, means responsive to a pressure differential at opposite sides of said dust bag to move said valve means from said seat for effecting flow of air through said passageway to render said device operable to produce said indication, said member being movable toward and from said valve means, means for imparting movement to said member toward and from said valve means to regulate the pressure difierential at opposite sides of said dust bag at which said device is rendered operable to produce said indication, resilient means for biasing said valve
  • first movable element means including said first movable element to regulate the tension of said spring means and control the magnitude of the biasing action of said spring means
  • last-mentioned means including a second element which is carried by said first element and movable on the latter toward and from said valve means, and said second element and said means for imparting movement to said member toward and from said valve means being movable and operable to hold said valve means against said seat'and render said device inoperable to produce said indication irrespective of the pressure difierential at opposite sides of said dust bag.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
US471879A 1964-07-17 1965-07-14 Device for signalling need for cleaning or replacing suction cleaner dust bag Expired - Lifetime US3279418A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8753/64A SE309296B (enrdf_load_stackoverflow) 1964-07-17 1964-07-17

Publications (1)

Publication Number Publication Date
US3279418A true US3279418A (en) 1966-10-18

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ID=20274945

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Application Number Title Priority Date Filing Date
US471879A Expired - Lifetime US3279418A (en) 1964-07-17 1965-07-14 Device for signalling need for cleaning or replacing suction cleaner dust bag

Country Status (10)

Country Link
US (1) US3279418A (enrdf_load_stackoverflow)
BE (1) BE667002A (enrdf_load_stackoverflow)
CH (1) CH420518A (enrdf_load_stackoverflow)
DE (1) DE1503725B2 (enrdf_load_stackoverflow)
DK (1) DK119474B (enrdf_load_stackoverflow)
FI (1) FI42120C (enrdf_load_stackoverflow)
FR (1) FR1443562A (enrdf_load_stackoverflow)
GB (1) GB1080504A (enrdf_load_stackoverflow)
NL (2) NL6509242A (enrdf_load_stackoverflow)
SE (1) SE309296B (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3381652A (en) * 1965-10-21 1968-05-07 Nat Union Electric Corp Visual-audible alarm for a vacuum cleaner
US3517693A (en) * 1967-08-24 1970-06-30 Henry G Dietz Low gas signal and indicator for gas cylinders
US3556043A (en) * 1968-12-16 1971-01-19 Ambac Ind Filter gauge
US4193292A (en) * 1978-01-11 1980-03-18 Aktiebolaget Electrolux Indicating device for vacuum cleaners
US4601254A (en) * 1983-03-24 1986-07-22 Huang Chung Siung Tire pressure warning device
US6467123B1 (en) 2000-06-07 2002-10-22 Royal Appliance Mfg. Co. Airflow indicator
US20040098823A1 (en) * 2000-06-07 2004-05-27 Royal Appliance Mfg. Co. Airflow indicator
US20070012001A1 (en) * 2005-07-18 2007-01-18 Lg Electronics Inc. Dust collecting unit for vacuum cleaner

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE421171B (sv) * 1980-04-18 1981-12-07 Electrolux Ab Anordning vid en dammsugare
JPS56155751U (enrdf_load_stackoverflow) * 1980-04-23 1981-11-20
US4520748A (en) * 1983-10-19 1985-06-04 Illinois Tool Works Inc. Differential-vacuum alarm device
GB2315231A (en) 1996-07-15 1998-01-28 Notetry Ltd Apparatus for Separating Particles
CA2287255A1 (en) 1997-04-22 1998-10-29 Cocensys, Inc. Carbocyclic and heterocyclic substituted semicarbazones and thiosemicarbazones and the use thereof
WO2006067648A2 (en) * 2004-12-24 2006-06-29 Arcelik Anonim Sirketi A vacuum cleaner having dust indicator

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2750915A (en) * 1952-12-20 1956-06-19 Electrolux Ab Structure for indicating need for removing suction cleaner dust bag
US2815733A (en) * 1955-08-19 1957-12-10 Whirlpool Co Suction indicator for vacuum cleaner

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2750915A (en) * 1952-12-20 1956-06-19 Electrolux Ab Structure for indicating need for removing suction cleaner dust bag
US2815733A (en) * 1955-08-19 1957-12-10 Whirlpool Co Suction indicator for vacuum cleaner

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3381652A (en) * 1965-10-21 1968-05-07 Nat Union Electric Corp Visual-audible alarm for a vacuum cleaner
US3517693A (en) * 1967-08-24 1970-06-30 Henry G Dietz Low gas signal and indicator for gas cylinders
US3556043A (en) * 1968-12-16 1971-01-19 Ambac Ind Filter gauge
US4193292A (en) * 1978-01-11 1980-03-18 Aktiebolaget Electrolux Indicating device for vacuum cleaners
US4601254A (en) * 1983-03-24 1986-07-22 Huang Chung Siung Tire pressure warning device
US6467123B1 (en) 2000-06-07 2002-10-22 Royal Appliance Mfg. Co. Airflow indicator
US20040098823A1 (en) * 2000-06-07 2004-05-27 Royal Appliance Mfg. Co. Airflow indicator
US6836930B2 (en) 2000-06-07 2005-01-04 Royal Appliance Mfg. Co. Airflow indicator
US20070012001A1 (en) * 2005-07-18 2007-01-18 Lg Electronics Inc. Dust collecting unit for vacuum cleaner
US7462210B2 (en) * 2005-07-18 2008-12-09 Lg Electronics Inc. Dust collecting unit for vacuum cleaner

Also Published As

Publication number Publication date
NL6509242A (enrdf_load_stackoverflow) 1966-01-18
NL128632C (enrdf_load_stackoverflow)
FI42120C (fi) 1970-05-11
DE1503725A1 (de) 1969-05-22
FR1443562A (fr) 1966-06-24
DE1503725B2 (de) 1971-10-14
FI42120B (enrdf_load_stackoverflow) 1970-02-02
CH420518A (de) 1966-09-15
GB1080504A (en) 1967-08-23
DK119474B (da) 1971-01-11
BE667002A (enrdf_load_stackoverflow) 1965-11-16
SE309296B (enrdf_load_stackoverflow) 1969-03-17

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