FILTER CARTRIDGE (OPTIONS) AND AIR FILTER ASSEMBLY (OPTIONS)

摘要

1. A filter cartridge for an air filter, comprising: a) a filter material with a first end and a opposing second end thereof surrounding an open interior; b) a first end cover and a second end cap opposing it, including: an end cap mounted on a first end of the filter material ; and an end cap mounted on the second end of the filter material; c) a longitudinal protruding part on one of the end caps, extending to the side from the opposite other end cap; 1) the protruding part covers the inner space and has a surface consisting of many spaced convex sections facing in the radial direction. 2. The air filter cartridge according to claim 1, wherein: a) the protruding portion has a surface consisting of a plurality of alternating convex and concave sections facing in a radial direction. The air filter cartridge according to claim 1, wherein: a) the protruding portion has an outer surface consisting of a plurality of convex sections facing in a radial direction. The air filter cartridge according to claim 3, wherein: a) the protruding portion has an outer surface consisting of a plurality of alternating convex and concave sections facing in a radial direction. The air filter cartridge according to claim 1, wherein: a) the protruding part has an inner surface consisting of a plurality of convex sections. The air filter cartridge according to claim 5, wherein: a) the protruding part has an inner surface consisting of a plurality of alternating convex and concave sections facing in a radial direction