US3458891A - Suction cleaner - Google Patents

Suction cleaner Download PDF

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Publication number
US3458891A
US3458891A US654493A US3458891DA US3458891A US 3458891 A US3458891 A US 3458891A US 654493 A US654493 A US 654493A US 3458891D A US3458891D A US 3458891DA US 3458891 A US3458891 A US 3458891A
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US
United States
Prior art keywords
air
casing
duct
filter
cleaner
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
US654493A
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English (en)
Inventor
Karl Gustav Grellsson
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
Original Assignee
Electrolux AB
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 Electrolux AB filed Critical Electrolux AB
Application granted granted Critical
Publication of US3458891A publication Critical patent/US3458891A/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
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
    • A47L5/36—Suction cleaners with hose between nozzle and casing; Suction cleaners for fixing on staircases; Suction cleaners for carrying on the back
    • A47L5/362—Suction cleaners with hose between nozzle and casing; Suction cleaners for fixing on staircases; Suction cleaners for carrying on the back of the horizontal type, e.g. canister or sledge type
    • 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
    • A47L9/0081—Means for exhaust-air diffusion; Means for sound or vibration damping

Definitions

  • a tank-type suction cleaner having an elongated casing is normally positioned horizontally on a surface and provided with a motor-fan unit for moving air in a path of fiow between an air inlet and an air outlet.
  • the bottom of the casing intermediate the ends thereof is provided with an imperforate transverse partition and an air discharge opening adjacent thereto. Air flowing in the casing from the air inlet at a first end of the casing is directed therefrom by the partition and passes exteriorly of the casing through the air discharge opening into an air duct which is at the bottom of the casing.
  • the air duct extends lengthwise of and exteriorly of the casing to the second opposite end thereof at which region air is discharged upward from the duct into a vertically extending diffusion chamber of an air filter having at least one wall formed of airpermeable material which has a cross-sectional area greater than that of the air discharge opening and functions to remove fine dust particles from air and discharge air from the difiusion chamber in a direction from the surface.
  • an improved suction cleaner in which air is drawn into the cleaner at an air inlet at a first end of an elongated casing, and, after flowing therethrough, is discharged through an opening which is intermediate the ends of the casing and at the bottom thereof and then flows through an air duct to a fine air filter at the second opposite end of the casing which serves as the air outlet and from which filtered air is directed from the casing without disturbing settled dust at the vicinity of the cleaner.
  • the fine air filter is vertically positioned at the second opposite end of the casing and has an upright diffusion chamber into which air flows upward from the outlet end of the air duct.
  • At least one wall of the filter is formed of air-permeable material which has a cross-sectional area greater than that of the air discharge opening at the bottom of the casing and functions to remove fine dust particles from air.
  • the wall formed of air-permeable material may be inclined at an acute angle to the vertical in a direction from 3,458,891 Patented Aug. 5, 1969 the opposite second end of the casing.
  • the air duct may be L-shaped with its horizontal arm at the bottom of the casing and its vertical arm at the opposite second end of the casing.
  • the top of the casing may be provided With a projecting ledge which overhangs the end wall of the casing at its second opposite end.
  • the air filter may comprise a frame formed of resilient material like plastic, for example, which can be detachably mounted in an upright position on the suction cleaner with the bottom inlet end of the filter connected to receive air from the upper end of the vertical arm of the air duct and the top part of the resilient frame yieldingly held against the underside of the projecting ledge.
  • the air duct comprises a plurality of duct sections which are telescopically connected together.
  • the casing includes an end cover at the second opposite end thereof to which an L-shaped duct section is fixed.
  • the other duct section or sections at the bottom of the casing are detachably held together and against an end of the L-shaped duct section by a locking device at the vicinity of the duct section into which air initially flows through the discharge opening at the bottom of the casing.
  • the locking device may comprise a tight wire which extends across the casing and is resilient in character and arranged to extend through and frictionally fit in a recessed portion of the duct section arranged to receive air from the air discharge opening.
  • FIG. 1 is a bottom perspective view of a suction cleaner embodying the invention
  • FIG. 2 is a side elevational view, partly broken away and in section, of the cleaner shown in FIG. 1;
  • FIGS. 3 is an enlarged fragmentary side elevational view, partly broken away and in section, of the cleaner shown in FIGS. 1 and 2;
  • FIG. 4 is an exploded perspective view of parts of the suction cleaner shown in FIGS. 1 to 3 to illustrate details more clearly;
  • FIG. 5 is a fragmentary vertical sectional view taken at line 5-5 of FIG. 2;
  • FIG. 6 is a horizontal sectional view taken at line 66 of FIG. 5;
  • FIG. 7 is a fragmentary vertical sectional view taken at line 7-7 of FIG. 6.
  • a horizontal tank-type suction cleaner 10 including a casing 11 having a top 12, bottom 14 and vertically extending side walls 15.
  • the casing is provided with a handle 16 and with wheels 17 and 18 to facilitate movement thereof on a supporting surface, the wheels 17 being at opposite sides of the casing and the single wheel or roller 18 at the front end of the casing being disposed between the side walls 15 of the cleaner in a recessed part in the bottom 14.
  • a front end cover 19 is removably secured in any suitable manner (not shown) to the casing 11 and formed with an inlet opening 20 to which a suction hose (not shown) is adapted to be removably connected.
  • Suitable cleaning appliances may be connected to the outer free end of the suction hose and through which air flows into the casing.
  • a perforated partition 21 at one side of which is disposed a removable dust collector or dust bag 22 which acts to separate dust from air as it flows therethrough.
  • Flow of air through casing 11 is effected by a motorfan unit 23 which includes a centrifugal fan 24 carried at one end of an electric motor 25.
  • the motor-fan unit 23 is suspended in casing 11 by structure 26 which provides a resilient mounting for the motor-fan unit and a seal between spaces 27 and 28 in the casing, the inner and outer peripheries of the suspension structure being respectively fixed to the motor-fan unit 23 and an inwardly extending flange 29 of the casing.
  • a switch 30 is located at the top of a rear hood or end cover 31 which is removably secured in an suitable manner (not shown) to the casing 11.
  • the switch 30 is provided with an actuating button 30a which extends upward through an opening in the end cover 31 and is accessible at the exterior of the casing 11.
  • the rear end cover 31 includes an imperforate end Wall 3111.
  • a cord reel 32 which is provided within the rear end cover 31,
  • the cord 35 wound on the cord reel 32 is adapted to pass through an opening (not shown) in the side wall of the rear end cover 31.
  • the cord 35 and switch form parts of an electrical circuit (not shown) for respectively connecting and disconnecting the motor 25 to and from a source of electrical energy in any manner well known in the art.
  • air in the space 28 is discharged therefrom through an opening 39 in the bottom 14 of casing 11 and flows lengthwise thereof beneath the bottom 14 through a passageway 40 into a diffusing chamber 41 of a fine filter 42 mounted on the cleaner adjacent to the outer surface of the end wall 31a of the rear end cover 31.
  • the fine filter 42 comprises two sheets 43 and 44 of air-permeable material which are spaced apart and have their peripheral edge portions fixed to a reinforcing frame 45 of rectangular form, as best shown in FIG. 4.
  • the frame 45 is formed to provide an air inlet opening 46 at the bottom of the filter 42.
  • the sheets 43 and 44 may comprise material such as cloth, paper or the like, for example, which is formed of fibrous material and is permeable to air and impregnated or bonded with a plastic like polyacrylonitrile butadienestyrene, for example.
  • the filter frame 45 also ma he formed of a plastic like polyacrylonitrile butadienestyrene, for example.
  • a plastic of this type is employed to provide the member or frame 45, it may be formed by compression molding in suitable dies in which the sheets 43 and 44 are positioned, whereby the sheets .4 and frame 45 become an integral structure with the sheets and frames bonded to one another.
  • the passageway 40 is L-shaped and includes a horizontal portion or arm at the bottom of the casing 11 and a vertical portion or arm which is at the rear end of the cleaner and has its upper end 47 formed to provide an internal recessed portion 48 which can receive and hold a projecting lip 49' for-med at the bottom of the filter frame 45, as shown in FIGS. 3 and 4.
  • a boss or projection 49 is provided at the underside of the ledge 48a to receive and hold the top of the filter frame 45 when the bottom thereof is placed in its hold position at the upper end 47 of the passageway 40. This can be readily effected when the filter frame 45 is formed of plastic and is resilient and distortable in character, the filter frame under these conditions being yieldingly held in place when the top part thereof is moved against the pro ection.
  • the fine filter 42 serves to remove fine dust particles from air passing through the opening 39.
  • the air-permeable filter 42 preferably is micro-porous in character and also serves as a diffuser.
  • the fine filter 42 is mounted in an upright or vertical position at the end of the cleaner at a region which is adjacent to the outer surface of the closed end 31a of the rear end cover, the filter being removed a substantial vertical distance from the bottom 14 of the casing with the bottom of the filter 42 being at a level above the tops of the wheels 17.
  • air is discharged through the opening 39 at a relatively high velocity.
  • the filter 42 has an overall cross-sectional area that is materially greater than that of the air discharge opening 39, so that the air will be subdivided into a multiplicity of tiny air streams which are discharged from the outer surfaces of the filter 42 over their entire area which is sufficient to reduce the velocity of the air discharged from the cleaner and reduce the likelihood of disturbing settled dust at the vicinity of the cleaner.
  • the passageway 40 extending between the opening 39 at the bottom 14 of the casing 11 and the filter 42 at rear 4 end wall 31a comprises a duct having three sections 51,
  • section 51 has an opening 51a formed with a flange 515 which extends upward into the opening 39 at the bottom 14 of the casing 11. As seen in FIG. 1, the duct section 51 is disposed between longitudinal reinforcing members 54 which are at the bottom 14 of the casing 11 and extend lengthwise of the cleaner at the side walls 15.
  • a tight wire 55 which is resilient in character, extends between the longitudinal members 54.
  • the wire 55 is held in a groove 510 at the left end of the duct section 51.
  • the end Wall 51d of the duct section 51 is inclined to the vertical so that, when the duct sections 51, 52 and 53 are assembled in the manner shown in FIG. 3, the wire can be moved down the inclined end wall 51d until it reaches the groove 510, at which time the wire will snap into place in the groove.
  • the left end of the duct section 52 telescopically fits in the right end of duct section 51 at 56.
  • the opposite right end of the duct section 52 telescopically fits in the lower end of the duct section 53, as indicated at 57 in FIG. 6.
  • the duct section 53 is formed by the rear end cover 31 and an L-shaped part 53a which is carried by the rear end cover 31. As shown in FIG. 5, the wheels 17 are journaled on the ends of a shaft 58 which extends across the casing 11 at the opposite sides of the passageway 40.
  • the rear end cover 31 is provided with walls 59 having semi-circular openings 60.
  • the L-shaped duct section part 53a, at opposite sides of the passageway 40, is formed with walls 61 having semi-circular openings 62.
  • the screws 65 function to fix the duct section part 53a to the rear end cover 31, the semi-circular openings 6% and 62 in the rear end cover 31 and duct section part 53a, respectively, serving to clamp and hold the shaft 58 between these parts. Since the duct section part 53a is carried by the rear end cover 31 in the manner just described, it will be understood that the taut wire 55 may be referred to as locking means for detachably locking the duct sections 51 and 52 together and holding these duct sections against the lower end of the duct section 53.
  • a suction cleaner accessory is often detachably connected to the air discharge opening 39 in the bottom wall 14 of the cleaner.
  • the accessory may be a hose or spraying device which is connected to one end of the hose, the opposite end of which is connected to the air discharge opening 39.
  • the end of the hose (not shown) may be provided with a suitable fitting adapted to be connected to a part 67 of a bayonet-type connection provided at the air discharge opening 39, as shown in FIG. 3.
  • the part 67 is held in place by a ring-shaped fitting 68 which is of zig-zag shape in section and disposed about the bottom 14 of the casing 11 at the opening 39.
  • a gap of annular form between the part 67 and fitting 68 defines a ring-shaped groove 69 which receives the flange 51]) formed at the opening 51a of the duct section 51.
  • a sealing ring 7t? is provided in the groove 69 to form an airtight seal when the duct section 51 is held against the bottom 14 of the casing 11 at the discharge opening 39.
  • a hose having a suitable fitting at the end thereof may be connected to the casing 11 at the air discharge opening 39, such fitting being of a type which cooperates with the bayonet-type part 67.
  • the duct section 51 again can be positioned at the bottom 14 of the casing 11 and connected to the other duct sections 52 and 53 at 56 and 57, respectively, and locked in place by the taut Wire 55.
  • said structure including an elongated spacing and means defining an air duct disposed exteriorly of said casing at the bottom thereof,
  • said casing having an imperforate transverse partition disposed between its first end and its second opposite end and an air discharge opening at the bottom thereof between its first end and said parttion and nearer to the latter and through which air is discharged exteriorly of said casing, said air duct means having an inlet to receive air discharged exteriorly of said casing through said air discharge opening,
  • said air duct means extending lengthwise of and exteriorly of said casing at the bottom thereof from said air discharge opening to the second opposite end of said casing and having an outlet for air at the second opposite end of said casing
  • said air-permeable material having a cross-sectional area greater than that of said air discharge opening at the bottom of said casing and functioning as a diffusion chamber
  • said air-permeable material being vertically disposed at the second opposite end of said casing and functioning to remove fine dust particles from air passing therethrough and discharging air from said chamber in a direction from the surface which avoids disturbing settled dust at the immediate vicinity of the cleaner.
  • said structure including an elongated casing and an air duct at the bottom of said casing,
  • said air duct extending lengthwise of said casing at the bottom thereof from said air discharge opening to the second opposite end of said casing and having an outlet for air at the second opposite end of said casing
  • said air-permeable material being vertically disposed at the second opposite end of said casing and functioning to remove fine dust particles from air passing therethrough and discharging air from said chamber in a direction from the surface which avoids disturbing settled dust at the immediate vicinity of the cleaner
  • said filter means comprising a frame which is resilient in character and a pair of walls having their peripheral edge portions fixed to said frame, at least one of said walls being formed of said air-permeable material,
  • said means at the upper part of the second opposite end of said casing for detachably holding said filter means including a member projecting from the top of said casing beyond the second opposite end there.- of, and
  • said member including a part for holding the top of said frame.
  • a suction cleaner as set forth in claim 2 in which said projecting member and said supporting means for said structure function to support the cleaner in a stable upright position on the surface with said filter means vertically removed from and protected from the surface.
  • said structure including an elongated casing and an air duct at the bottom of said casing,
  • said air duct extending lengthwise of said casing at the bottom thereof from said air discharge opening to the second opposite end of said casing and having an outlet for air at the second opposite end of said casing
  • said air-permeable material having a cross-sectional area greater than that of said air discharge opening at the bottom of said casing and functioning as a diffusion chamber
  • said air-permeable material being vertically disposed at the second opposite end of said casing and functioning to remove fine dust particles from air passing therethrough and discharging air from said chamber in a direction from the surface which avoids disturbing settled dust at the immediate vicinity of the cleaner
  • said filter means comprising first and second vertically extending walls defining said chamber, said first wall being nearer to the second opposite end of said casing than said second wall, and
  • a suction cleaner as set forth in claim 4 in which the second opposite end of said casing comprises a wall having an outer surface that is substantially vertical, and said first wall which is formed of said air-permeable material and is inclined to the vertical being nearer to said outer surface at one level than at a second higher level.
  • a suction cleaner as set forth in claim 5 in which the outer surface of said wall at the second opposite end of said casing extends above the top of said filter means, and the upper part of said outer surface being curved and extending over the top of said filter means and forming a roof for the latter.
  • a suction cleaner as set forth in claim 4 in which said second wall is formed of said air-permeable material and is substantially vertical when said filter means is connected to the outlet of said duct by said connecting means.
  • said structure including an elongated casing and an air duct at the bottom of said casing,
  • said air duct extending lengthwise of said casing at the bottom thereof from said air discharge opening to the second opposite end of said casing and having an outlet for air at the second opposite end of said casing

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Electric Suction Cleaners (AREA)
US654493A 1966-07-22 1967-07-19 Suction cleaner Expired - Lifetime US3458891A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE10082/66A SE333800B (en)) 1966-07-22 1966-07-22

Publications (1)

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US3458891A true US3458891A (en) 1969-08-05

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Application Number Title Priority Date Filing Date
US654493A Expired - Lifetime US3458891A (en) 1966-07-22 1967-07-19 Suction cleaner

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US (1) US3458891A (en))
CH (1) CH452815A (en))
GB (1) GB1170460A (en))
NL (1) NL6710145A (en))
SE (1) SE333800B (en))

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4858269A (en) * 1987-04-03 1989-08-22 The Scott Fetzer Company Wet/dry vac
US6611989B2 (en) * 2000-09-19 2003-09-02 Lg Electronics Inc. Vacuum cleaner having cooling features
US7165289B1 (en) * 2003-11-07 2007-01-23 Anne Gossage Animal shaped toy recovery and storage device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2888093A (en) * 1954-05-19 1959-05-26 Electrolux Ab Sound-dampening structure for suction cleaners
US3150403A (en) * 1959-03-24 1964-09-29 Electrolux Ab Tank type suction cleaner
US3172743A (en) * 1965-03-09 Commercial vacuum cleaners

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3172743A (en) * 1965-03-09 Commercial vacuum cleaners
US2888093A (en) * 1954-05-19 1959-05-26 Electrolux Ab Sound-dampening structure for suction cleaners
US3150403A (en) * 1959-03-24 1964-09-29 Electrolux Ab Tank type suction cleaner

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4858269A (en) * 1987-04-03 1989-08-22 The Scott Fetzer Company Wet/dry vac
US6611989B2 (en) * 2000-09-19 2003-09-02 Lg Electronics Inc. Vacuum cleaner having cooling features
US7165289B1 (en) * 2003-11-07 2007-01-23 Anne Gossage Animal shaped toy recovery and storage device

Also Published As

Publication number Publication date
NL6710145A (en)) 1968-01-23
SE333800B (en)) 1971-03-29
GB1170460A (en) 1969-11-12
CH452815A (de) 1968-03-15

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