초록 ▼

A filter element having a plurality of membrane layers. The filter element has a filter member having a porous sidewall. The sidewall has an outer surface and an inner surface which allow a gas to flow through. A first membrane is in communication with the outer surface for preventing particulate ma

A filter element having a plurality of membrane layers. The filter element has a filter member having a porous sidewall. The sidewall has an outer surface and an inner surface which allow a gas to flow through. A first membrane is in communication with the outer surface for preventing particulate matter from penetrating the outer surface. A second membrane is in communication with the inner surface for preventing particulate matter from penetrating the inner surface.

대표청구항 ▼

1. A filter element comprising:a filter member, said filter member having an open end, a closed end, and a porous sidewall, said side wall defining a bore which extends from a location beginning at said open end and terminates at the closed end for allowing a gas to flow, said sidewall having an out

1. A filter element comprising:a filter member, said filter member having an open end, a closed end, and a porous sidewall, said side wall defining a bore which extends from a location beginning at said open end and terminates at the closed end for allowing a gas to flow, said sidewall having an outer surface and an inner surface which allow a gas to flow through; a first membrane in communication with said outer surface for preventing particulate matter from penetrating into said sidewall from the outer surface; a second membrane in communication with said inner surface for preventing particulate matter from penetrating into said sidewall from the inner surface; and wherein said first and second membranes have a finer porous structure than the sidewall.