Filter device for filtering a gas flow

Details Filter device for filtering a gas flow Filter device for filtering a gas flow

1993-01-25

1994-05-03

Hart, Charles

Gas separation

Two or more separators

Plies or layers of different characteristics or orientation

55525, 280736, 280740, B01D 3910

Patent

active

053083709

ABSTRACT:
A filter device for filtering a gas flow, especially for filtering the gases produced by a gas generator for an impact protection cushion, comprises a filter element exhibiting several filter material plies of varying permeability lying in series in the flow direction. The filter element is fashioned as a wrapped member produced by winding up a length of filter material. The length of filter material has sectionally different filter materials, preferably wire mesh of differing mesh widths and metal fiber mats. A wrapped member is formed by winding up this filter material web, the wrapping plies of which consist of different materials with varying filter effects. This filter element wrap is inserted, for example, in the annular interspace between the two tubes of a double-tube gas generator. Owing to the rising pressure of the gas to be cleaned, the wrapped member is compacted with the consequence that its filtering function is improved.

REFERENCES:
patent: 4322385 (1982-03-01), Goetz
patent: 4865635 (1989-09-01), Cuevas
patent: 4941900 (1990-07-01), Cordes
patent: 4976759 (1990-12-01), Foltz
patent: 5048862 (1991-09-01), Bender et al.
patent: 5082476 (1992-01-01), Kahlbaugh et al.
patent: 5122270 (1992-06-01), Ruger et al.

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