US2135927A - Vacuum cleaner - Google Patents

Description

Nov. s, 1938. L, B V RHE 2,135,927

VACUUM CLEANER Filed Feb. 2'7, 1929 INVENTOR.

leonarfi l oorizeexs ATTORNE .5,

Patented Nov. 8, 1938 UNITED STATES PATENT OFFICE VACUUM CLEANER Application February 27, 1929, Serial No. 343,099

7 Claims.

improved air filtering and dust collecting system for such cleaners; this system contemplating the use of a bag consisting of a pocket which I 'functions primarily as a. dust receiver, a pocket which functions primarily as an air-filter, and an intermediate inlet opening, such opening being so arranged or positioned relatively to such pockets that the dust and dirt separated from the initially introduced air will remain practically undisturbed by the air currents developed during the subsequent operation of the machine.'

At present, the air filtering and dust collecting bags of portable vacuum cleaners are usually provided with a bottom opening through which the dust-laden air enters, and an adjacent pocket in which the separated dust collects. In time, and especially if the collecting bag is too infrequently emptied, the smallness of the dust-containing pocket will force the accumulated material to amass in such close proximity to the inlet opening that the entrance of additional air will be impeded and the entrapped dust and dirt cumulations contiguous to the inlet opening or in surrounding relation to its collapsible tube valve are detrimental, as on the one hand they result in impairing the efflciency of the suction system and as on the other hand they result in the impactive pulverization of the collected dirt, such first effect becoming apparent when the machine fails to clean satisfactorily and such second eifect becoming apparent when fine particles of dust begin to escape through the meshes or pores of the bag. If the collecting bag is made of cloth, or if such bag is openable, the abovementioned effects combine to make necessary an all too frequent emptying of the bag contents, 40 and if the bag is of the permanently closed paper variety, such effects make necessary its too frequent renewal or replacement.

My invention, with the object of avoiding the objectionable consequence of present bag arrangements, contemplates providing an improved bag having a combined filtering and collecting pocket located out of the path of the currents of entering air and in downwardly spaced relation'to a second and preferably somewhat larger pocket which desirably functions exclusively as a filter, it being'intended that such first-named pocket shall accumulate the dust and dirt separated from the intermediately incoming air by such second named pocket and such parts of the 55' first-named pocket as are not inactive as filters kept-in almost continuous suspension. Such acbecause of the material already collected. As compared with the present bags, my invention presents 'the advantages of an increased holding capacity obtained without material detriment to the efiiciency of the cleaner; the entrapped dirt 5 after having once settled remains practically quiescent and is not agitated or disturbed by the incoming air; bag leakage due to impact pulverization of the collected material is avoided; accumulations contiguous to the inlet opening are 10 eliminated; and finally, satisfactory operation of the cleaner over longer periods of time is insured.

To the accomplishment of the foregoing and related ends, said invention, then, consists of the 15 means hereinafter fully described and particularly pointed out in the claims; the annexed drawing and the following description .setting forth in detailcertain structure embodying the invention, such disclosed means constituting, 20 however, but one of various mechanical forms in which the principle of the invention mav be used.

In said annexed drawing:-

Fig. l-is a side elevational view of a vacuum 25 tached paper liner of the type particularly showrn 30 in the preceding figures.

For purposes of illustration, my invention is here shown in association with a standard vacuum cleaner which consists ofa wheeled floor tool II), a lower handle I I, an upper handle I2, an 35 intervening valve casing l3, a fan chamber l4, and a wheel supported motor housing IS. A rotary valve I6 is so arranged/in the valve casing l3 that air may be drawn ,through either the handle II or the handle ii, the former of suchv 40 handles communicating with the floor tool l0 and the latter of such handles being adapted for connection with accessory cleaning devices, such as brushes, nozzles, etc. A fan casing discharge pipe I1 is adapted for directing the dust-laden air sucked in through either of the handles into a confined porous paper collecting receptacle which functions to remove the entrained solid material by filtering the carrying air through its porous Walls.

When embodied in a machine of the type just described, my invention contemplates extending the discharge pipe I1 by means of a suitable tube l8, such tube making an air-tight connection with a discharge pipe through a ferrule or the like II and having .its distal end attached as by a clamp 20 to the handle 12. Associated with the tube 18 is an air filtering and dust entrapplng receptacle 2!, this receptacle desirably comprising an outer sustaining fabric bag 22 and an inner porous paper bag 28, the former acting to confine and protect the paper liner, and the latter (as above stated) acting to filter out the commingled dust "and permit the purifiedair to ,escape into the atmosphere. The bag 21, as best shown in Fig. 3, is desirably constituted a suitably folded and stitched paper sheet to the cleaners handle.

' 24, one side or edge of the enclosure so formed having been cut away or removed to form an inlet sented even when the accomulations of dust and dirt become elfective to diminish the filtering capacity of the lower walls deflningthe collecting pocket. a

The ,outer fabric bag 22 in general has the same shape as the enclosed paper bag 23. but its upper edge 29 is desirably formed with a slit or opening 30, such slit permitting of the insertion and removal of paper liners and having its lips or edges reinforced by suitable bars or strips ii.

The inner sides of the edges of the slit ll are adapted for closing overa flap I2, and their outer sides are provided with a plurality of eyes 33, such flap being intended for folding over the inclosed paper liner and such eyes being intended for attaching the assembled bag unit Secured within the mouth 34 of the bag 22 is a tube 35 which has its inner end provided ,with a curved deflector or baiile 16 and its outer end formed into a conhector 31, such deflector serving to .direct the incoming air downwardly or towards or in the general directionof the collecting pocket of the inner liner, and such connector serving to aflord a part with which the clamp I! may ooact when the bag-assembly is being arranged in operative relation to the tube ll.

When a paper liner is to beinserted within its confining bag, the slit It is first opened, and then such liner is positioned, and its neck is slid over or telescoped with the deflector I, such neck being held in such relation by means of a resilient or elastic band or the like. These operations being completed, the flap 32 is then folded over the. upper edge of the collecting pocket of the inner bag and the lips of the slit in the outer bag are brought together. when assembled, the

filtering and collecting unit may be connected with the cleaner by slipping the eyes 33 and I! over the respective tube and handle-hooks ll and ll, and byoperating the clamp 38 to secure the connector 31 to the tube ll. so prepared, is ready foroperation in the usual manner. Accordingly, the motor may be started and the cleaner moved about over the pile of a The machine as entering the pocket 21 of the bag 28; the dust bearing air strikes the deflector and is thereby given a turn in the direction ofthe pocket 2|,

the solid component of the entering stream finally coming to rest in such pocket, and the airin' the meantime filtering through the'pores or meshes of the inner bag and thus escaping into the outer atmosphere. Before any considerable quantity of dust and dirt has been collected, the entire inner surface of the liner functions as a filter, but as the quantity of separated material increases and the lower pocketaccumulates additional dust and dirt, the filtering effectiveness of the walls defining the collecting pocket becomes progressively less and correspondingly the walls of the upper pocket become more active, their larger -area and comparative freedom from accumulations enabling them to eiiiciently perform their intended functions under the increased load thus imposed. 'The inner bag'may, if desired, be provided with an opening through which the collected material can be emptied, but preferably this bag has no such opening, the entire liner and its accumulations being'removed as a unit from the outer bag and burned or otherwise dlsposedof, a new liner being then inserted in the manner hereinbefore explained.

- Other modes of applying the principle of my invention may be'employed instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means stated by any of the following claims or the equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as my invention:

1.. In a vacuum cleaner, a collecting bag having an enlarged upper portion and a reduced lower portion, a delivery conduitlying alongside said reduced portion and entering said bag intermediately oi said enlarged and reduced portions, and

' a'deflector associated with the terminal of said delivery conduit interiorly of said enlarged portion,'and adapted to direct the incoming air cur-' rent in the direction oi said reduced lower portion. 2. In a vacuum cleaner, a collecting bag having a filtering pocket and a collecting pocket, an oifset in the wall of said bag intermediately of said pockets, a delivery conduit lying along the wall oi. said bag and passing through said wall in said onset, and a deflector associated with the 0 terminal of said delivery conduit.

3. In a vacuum cleaner, an integral air filterlns and dust collecting bag one end portion of which comprises a filtering pocket and the opposite end portion of which comprises a dust collecting pocket, an onset in the side edge of the bag intermediate said pockets, and adelivery conduit extending along the outside of the collecting pocket and entering said filtering pocket through said onset, its discharge end directed away from the w collecting pocket.

4. In a vacuum cleaner, an integral air filtering and dust collecting bag one end portion of which comprises a filtering pocket and the opposite end portion of which comprises a dust collecting e5 pocket, an onset in the side edge of the bag intermediate said pockets, formed with a mouth,

and a delivery conduit extending along the outside of the collecting pocket and detachably connected to said mouth to discharge away from 7 portion of which comprises a collecting pocket, an 7 dust collector comprising an inner porous paper oflset in the side edge of the bag intermediate said pockets, formed with a mouth, and a delivery conduit detachably connected to said mouth and positioned to discharge away from said collecting pocket into said filtering pocket.

6. In a vacuum cleaner, an integral air filtering and dust collecting bag of porous paper one end portion of which comprises a filtering pocket and the opposite end portion of which comprises a collecting pocket, an ofiset in the side edge of the bag intermediate said pockets, formed with a mouth, an outer bag of relatively strong porous material, enclosing and sustaining said paper bag, and a delivery conduit detachably connected to said mouth and positioned to direct its discharge away from said collecting pocket into the filtering pocket.

7. In a vacuum cleaner having a handle, a

bag and an outer bag of relatively strong porous material enclosingand supporting said inner bag, each of said bags having one side edge composed ofnonaligned edge portions separated by an offset, the end portions of the bags on one side of said ofisets comprising filtering pockets and the

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