Two stage vacuum cleaner filter

Details Two stage vacuum cleaner filter Two stage vacuum cleaner filter

1996-08-12

1998-03-31

Smith, Duane S.

Gas separation

Two or more separators

Plies or layers of different characteristics or orientation

55487, 55498, 55502, B01D 4652

Patent

active

057333513

ABSTRACT:
A two stage vacuum cleaner filter is disclosed. The filter includes a first stage outer filter extending in a closed circumferential path with a second stage inner filter located in immediate proximity to and within the first stage outer filter. Sealing elements for securing opposite ends of the first stage outer filter and second stage inner filter to each other are provided. The second stage inner filter stops particles that might leak through the first stage outer filter.

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