초록 ▼

A filter assembly (10) for the filtration of toxic gases from the air is disclosed, which includes a unitized cylindrical housing having oppositely disposed end covers (11, 12), with an inlet port (11a) in one end cover and an outlet port (13a) in the side wall. An annular, pleated filter element (2

A filter assembly (10) for the filtration of toxic gases from the air is disclosed, which includes a unitized cylindrical housing having oppositely disposed end covers (11, 12), with an inlet port (11a) in one end cover and an outlet port (13a) in the side wall. An annular, pleated filter element (21) extends between the end covers (11, 12) between perforated liners (18, 19), and a third, perforated liner (20) is spaced outwardly from the center or common liner (19) to provide an annular space therebetween which is filled with activated charcoal (27). Fines media (25, 26) are positioned on opposite sides of the activated charcoal (27). The first, pleated filter (21) and the second, charcoal filter (27) are thus mounted contiguous to one another on opposite sides of separating wall (19, 25), and extend between the end covers (11, 12) to provide filtration for air being drawn through the filter unit.

대표청구항 ▼

A filter assembly comprising, in combination: (a) a unitized housing, comprising a pair of oppositely disposed end covers and an intermediate wall portion peripherally surrounding and continuously interconnecting said end covers, to define an internal cavity; (b) inlet and outlet ports formed throug

A filter assembly comprising, in combination: (a) a unitized housing, comprising a pair of oppositely disposed end covers and an intermediate wall portion peripherally surrounding and continuously interconnecting said end covers, to define an internal cavity; (b) inlet and outlet ports formed through said housing and opening into said internal cavity thereof; (c) a composite filter member within said housing cavity, between said inlet and outlet ports, having opposite end portions; said filter member comprising at least two different types of filter media, separated by and sharing a common wall; (d) sealing means between said opposite end portions of said filter element and said end covers; and (e) means including a filter media retaining wall compressibly holding said filter member and sealing means between said end covers.