Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1985-07-11
1986-12-09
Spitzer, Robert
Gas separation
Means within gas stream for conducting concentrate to collector
55267, 55372, 55373, 55379, B01D 4602, A47L 914
Patent
active
046278583
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a vacuum cleaner according to the preamble of claim 1.
In known vacuum cleaners the dust collecting filter bag is exchanged when a given quantity of dust has been collected therein so that the flow resistance at the inlet end has become too great which considerably reduces the suction effect of the motor. To provide a maximum filtering of the dust particles carried with the air, these filter bags are preferably made of two layers of filter paper. It is further known in order to protect the motor to provide a stationary coarse-meshed filter grating at the exhaust end of the vacuum cleaner. Even when the grating is fine-meshed the exhaust air will carry a considerable amount of fine dust particles so that although the major part of the dust collected during vacuum cleaning is retained in the filter bag the fine particles of the dust will be blown out together with the exhaust air. Thus, a satisfactory cleaning of premises will not always be obtained. Although the pores of the filter bag after some time of use will be clogged so that the filtering effect is increased this causes the flow resistance at the inlet end to increase to such an extent that the suction effect of the vacuum cleaner will be drastically reduced.
The object of the invention is to clean the exhaust air of a vacuum cleaner also from very fine dust particles and to ensure that the suction effect of the vacuum cleaner is not reduced due to too great a flow resistance at the inlet and/or the outlet end. This object is achieved according to the invention in that the exhaust air is led through a filter which preferably is integrated with the filter bag. By the exhaust air filter arranged in the flow path of the exhaust air the dust particles carried with the exhaust air will be retained so that this air will be substantially free of dust and dirt. After some time of use, however, not only the flow resistance at the inlet end which is caused by the filter bag being filled will be increased but also at the outlet end the flow resistance will increase because of the exhaust air filter successively becoming clogged. The replacement of the filled filter bag which has now become necessary will include in a single operation replacement of the exhaust air filter since the latter is fixed to the filter bag. In this way, full suction effect of the vacuum cleaner is reestablished since the too great flow resistance both at the inlet end and the outlet end has been removed by exchanging the one-piece filter.
The exhaust air filter is preferably formed by at least two layers of filter paper and can either be manufactured as an integrated part of the filter bag or be attached to the filter bag after the manufacture.
Preferably, the portion connecting the filter bag to the exhaust air filter consists, like the exhaust air filter and the filter bag, of a two-ply filter paper so that the exhaust air filter will be steadily fixed to the filter bag and cannot be torn off.
Additional characteristic features of the invention will appear in the following description and in the drawing.
An embodiment of the invention will now be described by way of example with reference to the drawing.
FIG. 1 is a length section through a vacuum cleaner with a filter bag according to the invention,
FIG. 2 is a section through the vacuum cleaner on the line II--II of FIG. 1, and
FIG. 3 is a perspective view of the filter bag according to the invention.
The vacuum cleaner shown is intended for floor cleaning and comprises a lower housing part 1 with an upper housing part in the form of a cover 2. The cover 2 is swingably and/or removably mounted on a hinge 3 in such a way that the lower housing part 1 is wholly uncovered after opening of the cover 2.
The lower housing part 1 is divided by a vertical wall 4 into a motor space 5 and a dust collecting chamber 6. The motor space is limited by a horizontal wall 7 on the level of the upper edge of the lower housing part 1.
In the embodiment shown a motor 8 with a fan 9 is mounted on the vertical wall 4 limiting the
REFERENCES:
patent: 2677896 (1954-05-01), Sparks
patent: 2722993 (1955-11-01), Gerber et al.
patent: 2794513 (1957-06-01), Hultberg et al.
patent: 3636681 (1972-01-01), Batson et al.
patent: 3744216 (1973-07-01), Halloran
patent: 3871847 (1975-03-01), Fish
patent: 3873285 (1975-03-01), Allen
patent: 4406678 (1983-09-01), Neugart
patent: 4530817 (1985-07-01), Holter et al.
patent: 4545794 (1985-10-01), Himukai
Miller Alfred E.
Progress - Electrogeraete
Spitzer Robert
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