Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1990-02-20
1992-09-01
Nozick, Bernard
Gas separation
Means within gas stream for conducting concentrate to collector
55123, 55131, 55139, 55155, B03C 300
Patent
active
051435241
ABSTRACT:
A vacuum cleaner is disclosed having an on-board electrostatic filtration device for removing ultra fine particles from the suction air stream which is discharged into the vacuum cleaner's dirt collection receptacle. The electrostatic filtration device includes a finely woven conductive mesh made from two electrically insulated sets of conductive filaments between which a low voltage electrical potential difference is applied. The polarity of the electrical potential difference is periodically reversed at low frequency to assist in maintaining filtering effectiveness notwithstanding the accumulation on the mesh of significant amounts of retained particulate matter. High permitivity material is incorporated between filaments to enhance electric fields in the mesh created by the electrical potential difference.
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European Patent Appln. No. 87103225.6, filed Mar. 6, 1987.
Inculet Ion I.
Lackner John R.
Murphy James C.
Nozick Bernard
The Scott & Fetzer Company
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