Patent ID: 6936084

Claim:
A filter for separating impurities from a gas stream, the filter comprising: a) a multi-piece housing, said housing having a housing body portion and a housing head portion, the housing head portion having an inlet for the gas stream which gas stream is to be cleaned and an outlet, and the housing head portion having further a first sealing surface; and b) a filter element accommodated within said housing, said filter element having an element head and a tubular element body which element body has a central element axis and an element inner volume, said element head having a second sealing surface releasably cooperating with the first sealing surface and a curved inlet elbow being configured between the inlet and the element inner volume, wherein part of the inlet elbow is configured inside the housing head portion and part of the inlet elbow is configured in the element head, wherein the first sealing surface and the second sealing surface meet in a sealing plane inclined at an angle of between 90 degrees and 60 degrees to the element axis, and wherein a radially disposed seal is provided in said sealing plane, said seal forming one of the first and second sealing surfaces.