US2684127A - Suction cleaner - Google Patents

Suction cleaner Download PDF

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Publication number
US2684127A
US2684127A US244794A US24479451A US2684127A US 2684127 A US2684127 A US 2684127A US 244794 A US244794 A US 244794A US 24479451 A US24479451 A US 24479451A US 2684127 A US2684127 A US 2684127A
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US
United States
Prior art keywords
filter
clamping
ring
casing
clamp
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
US244794A
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English (en)
Inventor
George A Brace
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 Co
Original Assignee
Hoover 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
Priority to BE513875D priority Critical patent/BE513875A/xx
Application filed by Hoover Co filed Critical Hoover Co
Priority to US244794A priority patent/US2684127A/en
Priority to GB21442/52A priority patent/GB711255A/en
Application granted granted Critical
Publication of US2684127A publication Critical patent/US2684127A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • 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

  • This invention relates to suction cleaners and more particularly to a novel filter mounting and clamping assembly therefor having marked advantages over prior constructions.
  • the object of the present invention is to provide a simplified filter mounting for a suction cleaner which entirely avoids the disadvantages of prior mountings.
  • the construction makes use of an expanding clamp preferably carried by the filter chamber closure.
  • the unique design of the clamp permits it to be collapsed to a much smaller diameter than its normal or filter clamping diameter. Hence, when collapsed, the clamp can be inserted into the filter mouth freely and without danger of displacing the filter. After the closure is closed, a single lever serves to operate the clamp and the locking mechanism for the closure.
  • Figure 1 is a side view of a tank cleaner inccrporating the invention with portions broken away to show structural details;
  • FIG. 2 is a sectional view through the filter chamber closure and clamping device taken along line 2--2 on Figure 3;
  • Figure 3 is a sectional view along line 33 on Figure 2;
  • Figure 4 is a view similar to Figure 3 of a second embodiment of the invention.
  • Figure 5 is a sectional view along line 55 on Figure i.
  • the open ended cylindrical casing it is supported on a pair of runners ii, I! and has a carrying handle l2 and a motor control switch [3 mounted on its upper side.
  • the exhaust end is closed by a flattened end cap it having an air outlet in its central portion.
  • the motor-fan unit it includes a conventional electric motor 16 and a multi-stage suction fan it having an axial air inlet opening it in its forward end.
  • This unit may be supported in any suitable manner as by being nested in a soft rubber ring l9 and an annular ring having its periphery sealed to the casing wall.
  • A. guard screen it covers the central opening in ring to prevent foreign matter from entering the fan.
  • a pair of U-shaped guard wires 22, 22 arranged at right angles to one another are carried by ring 25 and serve to space the bottom of the filter from the guard screen so that air can fiow freely to the fan.
  • the filter chamber contains an outer cloth filter bag and an inner paper filter bag 24 of substantially the same length.
  • the filter chamber is normally closed by a cap generally designated by the numeral 25. This cap is pivotally connected to the lower side of casing it by hinge 26.
  • end cap and filter clamping device will be best understood by reference to Figures 2 and 3 from which it will be seen to comprise a cup-shaped outer member 2'! through which the air inlet tube 28 extends and an inner diaphragm 29 is connected between the rim of member and an intermediate portion of tube 23.
  • the filter clamp is mounted on diaphragm 29 and includes an endless spring wire coil to having e general appearance of a doughnut.
  • the individual turns of the coil are spaced sufficiently to permit the coil to be collapsed readily to a much smaller diameter than its normal free diame er which is somewhat in excess of the di ameter of paper filter 24.
  • the clamping coil is supported for free radial movement between diaphragm 2t and disk 3! which is seated about the inner end oi tube 28.
  • a collar 32 is journaled about tube 28 between diaphragm 29 and disk 3
  • a control lever 33 Extending from one side of collar 32 is a control lever 33 which carries a control handle 34 on its outer end so that collar 32 may be rotated by the operator for the purpose of collapsing filter clamp 30.
  • a rigid backing for the inlet of the filter back against which the clamp expands so as to grip the filter inlet between the backing and the clamp may be done by arrangement such as that illustrated in Figure 2.
  • a channeled ring 32 is secured to the casing just inside the open end thereof having a seat as in its inner rim to support the soft rubber ring 44 on the inlet end of the cloth filter bag 23.
  • Extending downwardly from seat i3 is a cylindrical flange 45 which terminates below the axis of clamping coil 39. It will therefore be evident that this flange provides a rigid circular wall against which the clamping ring 39 can press the rims of one or both filter bags.
  • the clamping device is preferably provided with a combined pilot and housing for the clamping device, as generally indicated at 46.
  • This pilot is made of thin walled resilient material such as rubber or plastic and its lower inner end is secured to the rim of disk 3 i in any suitable manner as by riveting or cementing. Its upper end is similarly secured to diaphragm 29 and includes a ribbed thickened portion 3'! which cooperates with rim i l of the cloth filter to provide an air seal between the end cap and the cleaner casing.
  • wall M flexes inwardly at the slightest pressure and pro vides a conical-like pilot which enters the paper filter and forces the walls thereof outwardly gradually as the end cap is pivoted toward closed position. Because of its very fiexible nature it gives readily when it encounters a non-circular or irregular portion of the filter and then expands the wall of the filter outwardly as the cap is moved into closed position.
  • the end cap is held in closed position by an arcuate latch detent member 58 one end of which is rigidly secured to ring 42.
  • Control lever 33 can be engaged beneath the open end of this detent member only when the clamping coil is in its fully collapsed position and when the end cap 25 is in its closed position. Under these conditions, the control lever is located in the right hand end of slot 55 in diaphragm 29.
  • the counterclockwise movement of the control lever allows the exposed end 39 of the cable to pass back into the clamping coil 30 as this coil expands under its own internal stresses to its filter clamping position shown in Figure 3. As the coil expands it forces wall outwardly against the wall or" the paper filter and eventually presses it directly against the wall of the cloth filter and against the backing wall iii. Under these conditions, the end cap is locked in its closed position and the filter is tightly clamped in place.
  • the under side of detent latch 58 may be notched so that lever springs into the notch to positively lock the lever in its closed position.
  • a new paper filter is then inserted downwardly into the filter chamber so that its bottom rests on the bottom of the cloth filter.
  • the operator passes her hand quickly around the rim of paper filter to assure that the walls lie near rose of the cloth filter.
  • Closure 25 is then swung downwardly against the casing and control hair dle St is swung counterclockwise to its closed position thereby locking the cover in place.
  • the tension on cable 35 is relaxed allowing the clamping spring to expand against the inner wall of the thin walled pilot member t8 and causing it to press no open end of the paper filter tightly against the wall of the cloth filter and rigid backing member 3-5.
  • the cleaner may he used with the cloth filter alone, the paper filter alone, or with the two filters nested to gether. If the cloth filter is not desired it is simply removed from the cleaner. In this case the paper bag is inserted until its bottom rests on guard wires 22, 22 and its top is sealed against backing ring is by the clamping device in the same manner described above.
  • the expanding capacity of the clamping ring readily adapts itself to the slight additional requirements and is adequate to press the top of the paper filter tightly against the wall of ring t5.
  • a second embodiment of the invention is illus trated in Figures 4 and 5.
  • the same or similar elements are indicated by the same reference characters used in describing the first embodiment except that they are distinguished by a prime.
  • the second embodiment is generally similar to the first except for the construction of the clamping ring.
  • the alternate clamping device comprises a soft rubber ring 60 generally rectangular in cross section. This ring is mounted between a lower ring 3! and an upper ring member 29'. Embedded in the inner wall of the clamping ring are a plurality of cords 65 the outer ends of which are attached to hooks 62 carried on the side wall of collar 32'. The intermediate portions of cords 6! pass over rollers 33 carried by pins 64 secured to ring 3!.
  • clamping ring 60 In its normal relaxed position, clamping ring 60 is circular and has a diameter somewhat in excess of the diameter of the filter inlet.
  • Operatic n Operation of the second embodiment is generally similar to that of the first embodiment, as will be readily apparent from the foregoing description of the structure.
  • the cleaner is. assembled as illustrated in Figure 4 and that the filter bag is full of dirt.
  • the operator up-ends the cleaner onto the rear end cap and rotates, control lever 34 clockwise until it passes beyond the open end of latching detent 48.
  • This movement of the lever causes the hook supported ends of cords 6! to be rotated in a direction to pull diametrically opposed portions of the clamping ring radially inward to collapse the ring to the position indicated in Figure 5.
  • l'fhis not only unlatches the end cap, but releases the filter.
  • the end cap may now be swung to open position about hinge 26' so that the dirty filter bag can be withdrawn and carried to a point of disposal.
  • a new filter bag is then opened and inserted so that its bottom rests on the bottom of cloth filter 2d.
  • the end cap is lowered and handle 34' is swung counterclockwise simultaneously tolock the cover closed and to relax the tension on cords 6! so that clamp fill expands outwardly to clamp the filter tightly against the wall of the cloth filter and against backing ring 45.
  • the second embodiment may be used with the cloth filter alone, with the paper filter alone, or with both filters in the same manner as described in connection with the first embodiment.
  • my self-expanding clamping device constitutes an effective means for releasably securing the cover in place on the cleaner casing due to the large area frictional contact between the clamp and the inner wall of the cleaner casing.
  • Latching detents 48 or 48' then serve primarily as a means for requiring the operator to move having control lever 34 or 34 a predetermined distance to assure the desired contraction of the clamping ring before it is possible to remove the cover.
  • a suction cleaner having a casing provided with a filter bag opening, said casing being adapted to house an open end filter bag having a mouth substantially co-extensive with said casing opening, a removable cover for said opening, an expanding filter clamping means on the inner wall of said cover adapted when contracted to telescope into the mouth of a filter bag and to expand radially to a substantially larger diameter against the inner rim thereof to hold the same in place in said cleaner, said clamp being contractable so as to enter said filter mouth easily and without displacing the same inwardly into said casing, and common manually operable means for operating said clamping means to expand the same radially against the inner rim of said filter bag mouth and for releasably holding said cover in place over saidcasing opening.
  • a suction cleaner casing having a large area opening to receive a filter bag and having an inturned flange about said opening against which the mouth of a filter bag positioned in said oasing may be seated, a cover for said opening, a self-expanding filter clamp on the inner wall of said cover adapted when contracted inwardly toward the axis thereof to telescope freely into the mouth of a filter bag positioned in casing and when released to expand automatically to clamp the mouth of a filter tightly against said inturned flange, and manually operable means accessible from the exterior of said casing for contracting said clamping means while said cover is being assembled over said casing opening and for thereafter releasing the same so that it can expand against the filter mouth.
  • a casing for a filter bag a large area opening, said casing being adapted to house a filter bag having an inlet mouth of substantially the same area as said casing opening and to have the outer rim edge of said mouth seated against the rim of said opening in an air-tight manner, a cover for said opening, a combined pilot and expanding clamp for said filter mounted on the inner wall of said cover, said combined pilot and expanding clamp being flexible and contractable from a normal filter clamping diameter to a substantially smaller diameter whereby said pilot and clamp can be freely telescoped into the open mouth of a filter bag housed within said casing as said cover is seated over said opening, said clamp having a normal free diameter in excess of the diameter of the filter mouth so as to expand automatically against the walls of the filter when not restrained, and means connected with said clamping means for forcibly contracting the same from said normal diameter to a smaller diameter to release the filter and permit removal of said cover from said opening.
  • said means for contracting said clamping means includes means carried by said casing requiring the operation of said contracting means through a path of predetermined length before said cover is free for removal from said opening.
  • a filter clamping device of the self-expanding type comprising, a filter chamber having a wide area opening, a cover member for said opening, said filter chamber being adapted to enclose and support a wide mouth filter bag so that the mouth thereof is closely adjacent the rim of said wide area opening, a tubular member extending through said cover, a resilient clamping ring surrounding and spaced radially outward from the inner end of said tubular member, said clamping ring having a normal unrestrained diameter in excess of that of the mouth of a filter bag adapted to be received by said chamber, and means for contracting said clamping ring radially inwardly to an efiective diameter appreciably less than the mouth of a filter so that said cover and clamping ring can be readily inserted into and withdrawn from the mouth of the filter, said last named means also being operable to release said clamping ring when it is in place in said chamber so that said ring is free to expand against the inner wall of a filter mouth and hold the same in air-t
  • A. self-expanding clamp comprising, spaced parallel plates, a resilient ringlike member supported between said plates having a normal unrestrained diameter in excess of the diameter of one of said plates, control means movably supported in part by said plates and connected to the inner side of said ring, said control means being operable to move at least portions of said ring inwardly toward the center thereof to reduce the over-all effect diameter thereof appreciably and being movable to another position in which said ring is free to expand to a larger diameter under its own inherent resiliency.
  • a self-expanding clamping device as defined in claim 14 including a flexible tension member extending around the interior thereof and having its ends projecting through the inner wall thereof, means for anchoring one of said ends, and means connecting the other of said ends to said control means whereby movement thereof in one direction tensions said stringdilze member to contract said resilient ring and reduce its diameter.
  • a self-expanding clamp as defined in claim 10 including a flexible covering for said resilient ring-like member, said covering having its lateral edges connected to said plate members so as to enclose said clamping ring.
  • a self-expanding clamp comprising, an outer open ended tubular casing having a seating area on the inner rim of said opening, a flexible walled inner tubular member adapted to be housed therewithin and to have the rim thereof expanded outwardly into contact against the seating area on the rim of said casing opening, spaced parallel disks the outer one of which is adapted to provide a closure for said casing opening and the inner one of which is adapted to be located within said casing, a resilient clamping ring supported between said spaced disks having a normal unrestrained di-- ameter in excess of the diameter of said seating area on the rim of said casing opening, control means for contracting said clamping ring to reduce the diameter thereof substantially so that it can be moved freely into and out of said casing opening and the end of said inner flexible walled tubular member and for releasing said. clamping ring for expansion against the inner rim of the inner tubular member and forcing the same outwardly into air-tight contact with the seating area on
  • an outer tubular member a thin flexible walled inner tubular member having a rim adapted to be supported opposite a seating and clamping area therefor adjacent the inlet end of the outer member, a combined clamp and closure for said tubular members comprising a large diameter outer wall and an inner wall parallel thereto having a diameter appreciably smaller than the end of said inner tubular member so as to be readily telescoped thereinto, a resilient ring-like clamping member supported between said walls having a normal unrestrained diameter in excess of the diameter of the seating and clamping area on said outer tubular memher, and control means operable to contract said clamping member to a much smaller diameter while it is being telescoped into the ends of tubular members and for thereafter releasing said clamp so that the same expand under its own inherent resiliency to seat the rim of the inner tubular member firmly against the seating area therefor on said outer tubular member.
  • an open ended suction cleaner casing for housing a filter bag having an inlet opening adapted to be seated and clamped to the inner rim thereof, a combined closure and clamp for said openings comprising a cover member, a tubular inlet extending therethrough, a resilient ring-like clamping means surrounding said tubular inlet on the inner side of said cover and having a normal unrestrained diameter in excess of the diameter of the rim of said casing opening for contacting the inner wall of the filter bag inlet opening seating the same firmly against said casing rim, said clamping means being carried by said cover and being operable to frictionally engage said casing rim to hold the same closed when expanded thereagainst, and common manually operable control means accessible from the exterior of said casing for simultaneously contracting said clamping means to release said cover so that it can be moved away from said opening and to release said filter bag so that it can be withdrawn from said casing through said opening.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
US244794A 1951-09-01 1951-09-01 Suction cleaner Expired - Lifetime US2684127A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE513875D BE513875A (en)) 1951-09-01
US244794A US2684127A (en) 1951-09-01 1951-09-01 Suction cleaner
GB21442/52A GB711255A (en) 1951-09-01 1952-08-26 Improvements relating to suction cleaners

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US244794A US2684127A (en) 1951-09-01 1951-09-01 Suction cleaner

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US2684127A true US2684127A (en) 1954-07-20

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US244794A Expired - Lifetime US2684127A (en) 1951-09-01 1951-09-01 Suction cleaner

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GB (1) GB711255A (en))

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1151904B (de) * 1955-09-26 1963-07-25 Electrolux Corp Staubsauger
CN101744578A (zh) * 2010-01-08 2010-06-23 周丽君 吸尘器的多重集尘装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1319079A (en) * 1919-10-21 And herbert w
US1829255A (en) * 1929-02-07 1931-10-27 Hoover Co Suction cleaner
US1847352A (en) * 1925-06-15 1932-03-01 Mcclatchie Stanley Silencing vacuum cleaners
GB387245A (en) * 1932-07-27 1933-02-02 Arthur Morris Improvements in or relating to suction or so-called vacuum cleaners
GB449288A (en) * 1934-10-11 1936-06-24 Electrolux Ltd Improvements in or relating to dust collectors of vacuum cleaners
US2159116A (en) * 1937-03-25 1939-05-23 Hoover Co Suction cleaner coupling
US2193778A (en) * 1938-07-15 1940-03-12 Black & Decker Electric Compan Filter-bag-attaching device
US2447500A (en) * 1944-10-02 1948-08-24 Birtman Electric Co Tank type suction cleaner
US2467503A (en) * 1946-09-11 1949-04-19 Leonard W Seriven Dust container for vacuum cleaners

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1319079A (en) * 1919-10-21 And herbert w
US1847352A (en) * 1925-06-15 1932-03-01 Mcclatchie Stanley Silencing vacuum cleaners
US1829255A (en) * 1929-02-07 1931-10-27 Hoover Co Suction cleaner
GB387245A (en) * 1932-07-27 1933-02-02 Arthur Morris Improvements in or relating to suction or so-called vacuum cleaners
GB449288A (en) * 1934-10-11 1936-06-24 Electrolux Ltd Improvements in or relating to dust collectors of vacuum cleaners
US2159116A (en) * 1937-03-25 1939-05-23 Hoover Co Suction cleaner coupling
US2193778A (en) * 1938-07-15 1940-03-12 Black & Decker Electric Compan Filter-bag-attaching device
US2447500A (en) * 1944-10-02 1948-08-24 Birtman Electric Co Tank type suction cleaner
US2467503A (en) * 1946-09-11 1949-04-19 Leonard W Seriven Dust container for vacuum cleaners

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1151904B (de) * 1955-09-26 1963-07-25 Electrolux Corp Staubsauger
CN101744578A (zh) * 2010-01-08 2010-06-23 周丽君 吸尘器的多重集尘装置

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Publication number Publication date
GB711255A (en) 1954-06-30
BE513875A (en))

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