Vacuum cleaning apparatus

June 23, 1936. j. _H. adams . .2,044,827

VACUUM CLEANING APPARATUS

Filed March 13, 1935 2 Sheets-Sheet 1

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June 23, 1936. j. _H. adams 2,044,827

VACUUM CLEANING APPARATUS

Filed March 13, 1935 2 Sheets-Sheet 2

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ATTORNEY

Patented June 23, 1936

2,044,827

UNITED STATES PATENT OFFICE

2,044,827 VACUUM CLEANING APPARATUS Joseph H. Adams, Detroit, Mich. Application March 13, 1935, Serial No. 10,783 2 Claims. (CI. 183—37) This Invention relates to vacuum cleaning apparatus, and particularly to apparatus for vacuum cleaning furnaces and the like.

An object of the invention Is to draw dust5 laden or soot-laden air Into a settling chamber located beneath a filtering fabric diaphragm vfliile exhausting air from a chamber formed above said diaphragm, whereby delivery of the dust or soot through the fan or the like produc10 ing the air flow is avoided.

Another object is to compactly locate a motor driven fan within a filter bag suspended within a suitable casing and sealed at its mouth to said casing, the casing providing a dust or soot settling 15 chamber beneath said bag.

Another object is to mount the motor driven fan upon a cover removably engaging the open top of said casing, whereby the fan and motor are readily removable for inspection or repairs.

Another object is to adapt the dust or soot gathered by a vacuum cleaning apparatus to settle into a receptacle housed in the base of said apparatus and readily removable from said base for disposal of accumulated dust or soot.

These and various other objects the invention attains by the construction hereinafter described, and illustrated in the accompanying drawings, wherein:

Fig. 1 is a view of the apparatus in vertical axial 80 sectional elevation.

Fig. 2 is a relatively transverse vertical axial sectional view.

Fig. 3 is a front view of the apparatus partially in axial section and showing the air filter and the 85 unit formed by the fan motor and cover of the apparatus partially withdrawn from the casing thereof.

Fig. 4 is a cross sectional view taken upon the line 4—4 of Fig. 2.

Fig. 5 is a fragmentary vertical section showing a spring latch device for maintaining air sealing engagement of the cover and casing.

In these views, the reference character I designates a sheet metal open-topped casing pref40 erably of cylindrical form, which is rigidly mounted upon and in open communication with a rectangular base 2. Said base houses an open-topped sheet metal receptacle 3 for dust or soot, which receptacle may be slidably withdrawn from the •° base through the open front of the latter. The front wall of said receptacle normally forma a closure for the front opening of the base, and is adapted to be held in air sealing engagement with the base by spring latch devices 3α laterally ^w pivoted upon the base (see Fig. 4) and hooked to exert rearward pressure on said receptacle. The top edge of the casing I is exteriorly rolled about a wire reinforcement as indicated at 4.

. Suspended within the casing i is an air filter bag or diaphragm 5 formed of suitable fabric, s the upper margin of which is outwardly extended as indicated at 8, for engagement between the • reinforced edge of the casing I and a sheet metal cover 7. The latter is adapted to-be held in air sealed engagement with the casing by a plurality in of spring latch devices 8 pivoted laterally on the casing and hooked to engage over the cover Preferably, an annular gasket 8 of any suitable yieldable material is secured to the under face of said cover to seat on the outturned edge 8 of the u filter bag.

Secured to the bottom face of the cover 7 are four hangers 10 formed of strap iron and arranged in opposite pairs. At approximately midheight of the casing I, said hangers are rigidly 20 connected by a pair of relatively transverse strap iron supports 11 on which is mounted fast a platform 12. Axially of the casing, a hook 13 is secured to the supports 11 therebeneath, its «han*· interconnecting the platform and said supports 25 Detachably engaging said hook is a loop 14 carried centrally and interiorly by the bottom of the bag 5, whereby said bottom is held raised within the bag in an approximate dome form. To prevent suction within the bag from drawing up its 30 lower portion and interfering with the riesnribed position of the bag, the hangers 10 have portions projecting below the supports ii and into the lower portion of the casing I, and bent to a U-form as indicated at 15, their ends being 35 riveted to the supports 11 inwardly of the ends of said supports. Thus the extensions 15 hold the wall of the bag stretched downwardly to the point of juncture with the dome-shaped bottom portion.

Mounted on and secured to the platform 12 is a fan 16 and an electric motor 17 driving said fan, the fan having the usual lateral inlet 18 and having its usual tangential outlet connected to a pipe 19 projecting upwardly through the cover 7 and 45 having air sealed engagement with the cover. Into one of the corner portions of the base 2, a flexible air inlet tube 20 opens downwardly, said tube having a suitable length to provide for its insertion in a furnace flue or for extending it to 50 any point from which dust, dirt, soot, or ashes are to be removed.

In the use of the described apparatus, when, the motor 17 is energized, the fan 16 discharges air from the casing I and consequently draws air 55

2,044,827 upwardly through the filter bag 5. The vacuum tendency tnus created In the lower portion of the naming | and in the base 2 creates a powerful suction in the intake tube 20 whereby any soot or , the like adjacent the inlet end of said tube will be drawn into the apparatus. Within the apparatus, the foul air will be afforded a very considerable expansion, whereby the soot or the like will be free to settle in the receptacle 0. The in filter bag in its described highly extended form provides a sufficient area to allow the upward passage of air at a quite low velocity, whereby there is eliminated any tendency of the lighter particles of soot or dust to collect on the bag and 15 obstruct the air flow therethrough.

Mounting the fan and motor upon the cover and within the bag, as described, produces a compact and relatively inexpensive structure, and further provides for very convenient removal of 20 the fan and motor for inspection, oiling, or repairs. Clamping of the bag in its position of use by engagement of the bag margin between the cover and the edge of the casing also permits ready removal of the bag for any purpose.

While the apparatus has been particularly •described in its application to use in cleaning furnaces, it is to be understood that said apparatus may be put Into numerous other uses.

The invention is presented as Including all such 30 modifications and changes as come within the scope of the following claims.