Filter element

Details Filter element Filter element

2005-08-09

2005-08-09

Spitzer, Robert H. (Department: 1724)

Gas separation

Two or more separators

Plies or layers of different characteristics or orientation

C055S385300, C055S487000, C055S497000, C055S521000, C055S524000, C055S527000, C055SDIG002

Reexamination Certificate

active

06926750

ABSTRACT:
A filter element comprises an oil-impregnated filtering member, and a transmission preventing layer formed on a downstream side of the filtering member, for restricting transmission of at least the carbon dusts from the oil-impregnated filtering member. The filtering member may be formed like a ridge-like-folded structure. The transmission preventing layer may be formed of a coating layer having a resistance against a viscous oil that is impregnated in the filtering member. This coating layer may be formed uniformly as a whole or the thickness or the content of the coating layer may be increased partially. A ventilation shutting-off member (filling layer) may be formed as the transmission preventing layer in the root portion areas of the ridge portions. The transmission preventing layer may comprise a resistant component that is insoluble in the oil that is impregnated in the filtering member.

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