Dust collecting filter, dust collecting device, and air...

Details Dust collecting filter, dust collecting device, and air... Dust collecting filter, dust collecting device, and air...

2006-05-23

2006-05-23

Nguyen, Ninh H. (Department: 3745)

Rotary kinetic fluid motors or pumps

With separating means or guard for solid matter in working...

C055S487000, C055S521000

Reexamination Certificate

active

07048501

ABSTRACT:
A large capacity HEPA filter is produced having a layered filter medium unitarily formed by an upstream non-woven fabric, which can remove 70 to 90% of 0.3 μm particles, and a downstream non-woven fabric, which can remove 99.9% of 0.3 μm particles or more. The layered filter medium is shaped as a mini pleat shape in a thickness direction and an entire shape in the thickness direction is a plurality of continuous Vs. Also, a dust collecting device having such a large capacity HEPA filter is produced and an air intake device for a gas turbine is provided with such a dust collecting device.

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