Patent ID: 7438735

Claim:
A filter apparatus with automatic cleaning for removing fine particulate material from a flow of exhaust gas, said filter apparatus comprising: a gas-impermeable outer conduit having an open end and a closed end, said open end configured for receiving the flow of exhaust gas, an interior of said outer conduit being axially divided into a first side and a second side; a first clean flow path and a first dirty flow path defined within said first side of said outer conduit; a first gas-permeable inner liner separating said first clean flow path and said first dirty flow path, and separating said first clean flow path from said open end; a second clean flow path and a second dirty flow path defined within said second side of said outer conduit; a second gas-permeable inner liner separating said second clean flow path and said second dirty flow path, and separating said second clean flow path from said open end; and a control valve assembly connecting one of said first clean flow path and said second clean flow path to a corresponding exhaust conduit, and connecting the other of said first clean flow path and second clean flow path to a selectively pulsed supply of cleaning gas.