Patent ID: 11878122
Assignee: KONINKLIJKE PHILIPS N.V.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 3:
4. The filter assembly according to claim 2, wherein the fine particle filter member comprises a frame portion including an inner frame portion and an outer frame portion disposed outside of the inner frame portion on a common base of the frame portion, the inner frame portion including a plurality of inner walls vertically disposed above the common base and positioned around an opening in the common base, and the outer frame portion including a plurality of outer walls vertically disposed above the common base, wherein a first one of the inner walls and a first one of the outer walls forms a first groove above the common base between the inner frame portion and the outer frame portion and wherein a second one of the inner walls and a second one of the outer walls forms a second groove above the common base between the inner frame portion and the outer frame portion, wherein the first groove is structured to receive a first vertically disposed edge portion of a bottom perimeter portion of the housing portion and the second groove is structured to receive a second vertically disposed edge portion of the bottom perimeter portion of the housing portion, and wherein the inner frame portion is structured to be received within the bottom perimeter portion of the housing portion to releasably secure the fine particle filter member to the coarse particle filter member; and
wherein the second filter media portion is attached to the inner frame portion and covering the opening.