US2133141A - Vacuum cleaner - Google Patents

Description

VOct. 11, 1938, o..Ho| M-HANSEN VACUUM CLEANER Filed Deo wlw @MAQS nu` l 1d, ma

' ed within the casing.

Patented Oct. 11, v1938 I UNITED STATI-:s

PATEN'r OFFICE VACUUM CLEANER New York- Appueetien December 5, 193s, serial No. '114.404

v 4 Claims.

The present invention relates to vacuum cleaners.

The object of my invention is to provide an improved construction and arrangement for vacuum cleaners in which the space occupied by the bag is decreased. e

In the accompanying drawing, Fig. 1 is a perspective view of a vacuum cleaner embodying my invention; Fig. 2 is fa top plan view of the centrifugal separator used in the cleaner; Fig. 3 is'a sectional view taken on line 3-3 of Fig. 2; Fig. 4 is' a sectional view taken on theline 4-4 of Fig. 3; Fig. 5 is a sectional view taken on line 5 5 of Fig. 1; Fig. 6 is a view showing Vthe method of making the bag; and Fig.A 7 is an'enlarged fragmentary sectional view taken on line 1-1 of Fig. 6.

Referring to the drawing, I have shown my invention applied tol a vacuum cleaner having a casing I which is supported on front and rear .supporting wheels 2. At the front of the casing is a suction nozzle 3 through which all" is drawn by means of an electric motor driven fan mount- The air is discharged through a discharge outlet 4. A handle 5 carried by a fork 4I pivoted on the casing is used 'to\ move the cleaner over the surface beingi cleaned.

The dust-laden air discharged i'rom the outlet 4 is conducted bymeans ot a flexible conduit 1 to the inlet 8 of a centrifugal separator contained within a casing 9. The inlet 8 discharges the air tangentially within the casing, producing a whirling annuls of air within the .casing which centrifugally separates the dust from the air. Air is discharged from the casing through whirling air, indicated by arrows i2, issuch that the air must turn through an angle greater than degrees in order to pass through the slots 'I|i.- Particles ofdirt suspended in the air entering the slots Ill have a tendencyto be thrown outward as the-.air is making the necessary sudden change in direction. The'slots therefore assist in the separation of the dust from `the air. The lower end ofthe tubular member 'ii -is closedV by a baille plate I3 which provides a relatively narrow passage il between outer edges and side walls ofthe casing 9.' e dust carried by the whirling air has a tendency to move toward the side walls of the casing and a considerable portion'of the dust will fall .through Athe passage I4 into the space belowthe bathe I3. 'I'he space below thebaiile I3 is protected by thebaiile from rapidly whirling air and the dust therefore tends to settle more readily in this space. The bottom'of the casing 9 is closed by a hinged plate I5which is held against a gasket IB on the lower edge of the' casing by 5 by means of brackets I8. The centrifugal sepa' 1 rator is particularly effective in separating the heavy particles of dirt from the air. The tubular -member II which conducts the air from the centrifugal separator is connected through a co'upliug i9 to the lower end of a vacl uum cleaner bag 20. The construction of the vacuum cleaner bag isv clearly shown in Figs. 5, \6 and 7. It comprises two sheets of fabric'i and 22 which are stltchedtogether around their outside edges and connected to the coupling I9 .2

in the same manner as the conventional vacuum cleaner bag. The sheets 2i and 22 are stitched together along lines 23 extending from the upper v end oi' the bag to points near the lower end of the bag. This stitching provides a pluralityjoi' 25 tubular passages 24 which communicate a head- -er portion 25 between the coupling I9 and the lower ends of the passages. In the assembly of the bag-the outside edges 2i.- and 21 are stitched together so that the bag-is in the form of lan 3 0 annulus. The bag is then slipped .over the vacuum cleaner handle and the coupling Ilis connected to the member II. The bag is supported on the handle by means of a cord 28 extending between a ring 2l von the handle 35' and a tab 30 on the-upper endof the bag.

With this construction the'bag has a large lterlng surface, but due 'to the fact that the walls, of the bag are inthe form of tubular pase sages the space occupied by the bag is smal1.'40 The space requirementsv Aof the cleaner are iurther decreased by arranging thebagso that it encircles the vacuum cleaner handle. This bag is of particular utility inconnectionwith vacuum cleaners having` centrifugal separators. 5 Centrifugal separators are primarily effective in separating the heavy particles of dust from the air. Some of the'lighter particles are carried in the air 'discharged from the separator and some formof'illteris therefore desirable for separating .these lighter particles of dust from the air. 'I'lie bag illustrated -ls very satiaetory' for this function since itgprovides a large flltering suriaeewhich r'equire-cleaningat -ina 1. A vacuum cleaner bag having inner and outer annular fabric Walls, said inner wall adapted to form a central passageway open at both ends whereby the bag may be arranged around a vacuum cleaner handle, an opening in one end of said bag adapted to be connected to the discharge outlet of a vacuum cleaner, and means fastening the walls together for providing a plurality of tubular passages and a header communicating with said opening for discharging air to said passages.

2. A vacuum cleaner bag having inner and outer walls joined at their edges and adapted to form an open ended central passageway, means fastening the walls at other than-their edges for providing a plurality of tubular passages and a header, and an opening in said header adapted f1. A vacuum cleaner bag comprising a pluwhich is adapted to be wrapped around the 20 handle of said vacuum cleaner.

OSMUN'D HOLM-HANSEN.

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