US2721625A - Canister type suction cleaner - Google Patents

Description

Oct. 25, 1955 R C, AGERSTROM 2,721,625

CANISTER TYPE SUCTION CLEANER Filed Aug. 26, 1953 5f d f90 Q IN VEN TOR. aer C.' dgens'ra 771.

United States Patent O CANISTER TYPE SUCTION CLEANER Robert C. Lagerstrom, Bloomington, Ill., assigner, by mesne assignments, tov Henney Motor Companyylne., New York, N. Y., a corporation of New York Application August 26, 1953, Serial No. 376,728

2 Claims. (Cl. 183--3:7)`

This invention relates to suction cleaners in general and has particular reference to anew and improved canister type suction cleaner.

A principal object of the invention is to provide a new and improved canister type suction cleaner.

A further object of the invention is to provide a canister type cleaner having a novel air filtering' means.

Another object of the invention is to provide a canister type cleaner having a disposable primary filter and an improved means for readily detachably connecting the primary filter to the cleaner.

Other and further objects of the invention will be apparent from the following description and claims Yand may be understood by reference to the accompanying drawings, of which there is one sheet, which by way of illustration show a preferred embodiment of the invention and what I now consider to be the best mode in which I have contemplated applying the principles of my invention. Other embodiments of the invention may be used without departing from the scope of the present invention as set forth in the appended claims.

In the drawings:

Fig. l is a vertical sectional view through the improved canister cleaner; and

Fig. 2 is an elevational view of a part of the improved Vcoupling means for the disposable primary filter of the cleaner.

Referring more particularly to the drawings, the cleaner comprises cylindrical upper and lower shells and 12 having beaded edges 14 and 16 respectively and defining a hollow casing. The lower beaded edge 14 of the upper shell 10 is telescoped over the upper edge of shell 12 and suitable clamps 18 mounted on lower shell 12 are adapted to detachably secure the upper and lower shells together as shown.

The upper shell 10 has a top wall 20 provided with a central opening 22 therein. A motor and fan unit 24 comprises an electric motor 26 and a fan 28 mounted within a cylindrical casing 30. A ring 32 of resilient material such as rubber is disposed between the lower end of the fan 28 and the bottom Wall 34 of the casing 30 for absorbing vibrations of the motor and fan unit. The casing 30 has a ange 36 adapted to be secured to the .underside of the top wall of shell 10 by means of screws 38 for supporting the motor and fan unit 24 within the upper shell 10. Gasket material 40 may be disposed between flange 36 and wall 20.

The lower shell 12 is provided with an inwardly extending sleeve 42 defining an inlet opening for dirt laden air to be drawn into the lower shell. A coupling member 44 is secured to sleeve 42 and comprises a hose coupling portion 46 provided with a bayonet slot 48 by means of which a suction cleaner hose may be connected to the coupling member 44. A gasket 50 provides an airtight connection between sleeve 42 and coupling member 44 and the coupling member is secured in place by means of a split ring 52 located in an annular groove provided on the coupling member. The coupling member 44 is formed at its inner end to provide a bag coupling portion 54 having a tapered outer surface 56 to which may be secured a disposable paper bag 58 forming a primary filter. A retaining ring 60 in the form of a cylindrical ring having a laterally extending flange 62 at one end thereof is provided for releasably securing the primary filter 58 to the coupling member 44. To assemble a bag 58 onto the coupling member, the neck 64 of the bag is constricted and inserted through the annular ring 60 and allowedV to flare outwardly asv shown in Fig. l. The

bag and retaining ring 60 are then slid onto the tapered portion 56 of the coupling member and due tothe taper the bag and ring are firmly wedged onto the coupling member. The flange 62 of the ring 60 may be elongated at opposite sides thereof as shown at 66 in order to facilitate handling of the retaining ring and assembly and removal of the bag and ring from the coupling member 44.

A secondary filter unit comprises an assembly consist'- ing ofy an annular supporting ring 70 of rubber or other like material anda secondary filter' in the form of a cloth bag 72 secured thereto. The cloth bag 72 may be secured to the supporting ring 70 by stitching or in any other suitable manner. A germ trap 74 in the form of a fine mesh screen having suitable fabric material woven or impregnated therein is also secured to supporting ring 70 and is substantially cup-shaped as shown and extends below the lower end of the motor fan unit 24. In operation, dirt laden air is drawn into the primary filter 58 through coupling member 44 and the filtered air is then drawn through secondary filter 72 which removes any very fine dust particles which may have escaped through the pores of the primary filter. The germ trap 74 is adapted to purify the filtered air before it passes through inlet opening 76 in the motor fan 24. The supporting ring 70 is adapted to seat on the beaded upper edge 16 of the lower shell 12 and to be clamped against the beaded edge 16 by a llange 78 secured to the inner wall of shell 10, thus providing an airtight seal between the shells 10 and 12. When the clamps 18 are released, the upper shell and the motor and fan unit secured thereto may be raised from the lower shell 12. The supporting ring 70 and the filters 72 and 74 secured thereto may then be lifted from the lower shell to permit access to the disposable filter 58.

A shroud 80 is secured to the upper wall 20 of casing 10 by means of suitable straps 82 and the shroud 80 surrounds the upper end of shell 10 in spaced relation so as to dene a space 84 between the shroud and the upper wall 20 into which filtered air is discharged from the motor and fan unit 24. The shroud is provided with a downwardly turned peripheral edge 85, the outer end of which is spaced a slight distance from the shell 10 so as to define a downwardly directed annular exhaust outlet 86 through which the filtered air is discharged from the cleaner. A handle 88 is secured to the shroud 80 by the rivets or bolts 90 which also secure shroud 80 to straps 82.

While I have illustrated and described a preferred embodiment of my invention, it is understood that this is capable of modification and I therefore do not wish to be limited to the precise details set forth but desire to avail myself of such changes and alterations as fall within the purview of the following claims.

I claim:

l. A suction cleaner comprising separable upper and lower shells defining a hollow casing, said lower shell having a vertically disposed wall provided with an air inlet opening and said upper shell having a top wall provided with an air outlet opening, a motor and fan unit supported by said upper shell and having an air inlet presented toward said lower shell and an air outlet communicating with the opening in said top wall and operable to create fiow of air through said casing, a horizontally disposed cylindrical coupling member within the inlet opening in said lower shell having provisions at its outer end for attaching a suction hose thereto, a primary iilter in the form of a paper bag having its neck fitted over the inner end of said coupling member, an annular supporting ring of resilient material clamped between said upper and lower shells, a secondary tilter in the form of a cloth bag secured to said supporting ring and disposed between said paper bag filter and said motor and fan unit, a third filter in the form of a wire-fabric screen secured to said supporting ring and disposed between sad secondary filter and said motor and fan unit, and a shroud surrounding the top Wall of said upper shell in spaced relation and having a downwardly turned peripheral edge so as to define, together said said upper shell, a downwardly directed, annular exhaust outlet from said casing.

2. A suction cleaner comprising separable upper and lower shells defining a hollow casing, said lower shell having an air inlet opening and said upper shell having a top wall provided with an air outlet opening, a motor and fan unit supported by said upper shell and having an air inlet presented toward said lower shell and an air outlet communicating with the opening in said top wall and operable to create iiow of air through said casing, a horizontally disposed coupling member securied within the inlet opening in said lower shell and having provisions at its outer end for attachment of a suction hose thereto and tapering toward its inner end to provide a bag coupling portion, a primary filter in the form of a disposable paper bag having its neck fitted over said tapered portion of said coupling member, a retaining ring surrounding said neck and wedged onto said tapered portion foi*- releasably securing said bag to said coupling member, an annular supporting ring of resilient mate rial clamped between said upper and lower shells, a secondary filter in the form of a cloth bag secured to said supporting ring and disposed between said paper bag filter and said motor and fan unit, and a third iilter in the form of a wire-fabric screen secured to said supporting ring and disposed between said secondary filter and said motor and fan unit.

References Cited in the tile of this patent UNITED STATES PATENTS 2,008,067 Faber July 16, 1935 2,064,587 Carlstedt Dec. l5, 1936 2,394,208 Schaaf Feb. 5, 1946 2,649,926 Cronmer Aug. 25, 1953 2,656,009 Kent Oct. 20, 1953

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