Filter cartridges; features and methods of assembly; air cleaner assemblies; and, filter cartridge combinations

摘要

Filter cartridge arrangements, features thereof and assembly for use therewith, are provided. Selected filter cartridge features disclosed are particularly well adapted for use with a safety or secondary filter cartridge, usable with media thereof projecting into an open interior of a main filter cartridge, in use. An example filter cartridge is described, with a non-pleated end and a pleated end, although variations are also described. Advantageous main cartridges are also described. Methods of assembly and systems for use are described.

主权项

1. A filter cartridge comprising:
(a) an extension of media surrounding an open interior and having a first end and a second end; and, (b) an end piece adjacent the second end of the media; the end piece including:
(i) a central region having a central projection extending in a direction away from the first end;(ii) an outer surface directed away from the first media end;(iii) an inner surface directed toward the first media end having a central recess therein extending in a direction away from the first media end and surrounded by the central projection; and,(iv) a resilient grommet having a portion positioned on the central projection and in the central recess to surround a space sized to receive a projection therein when the filter cartridge is installed for use.