| 摘要 |
<p>A filter assembly employs radially inwardly and outwardly displaced portions (22, 24) of a peripheral roll seam (16) on the cartridge (10) as components of a cartridge compatibility matrix. A substantially annular space (20), the radial configuration of which varies with the convoluted roll seam (16), is defined between the roll seam (16) and a cylindrical wall of the cartridge end cap (12). The base (80) includes an axially projecting receptacle wall (93) that terminates in a coded lip (82) to define a receptacle (87) for receiving the cartridge end cap (12). The cartridge mounting system requires axial reception of the coded lip (82) into the substantially annular space (20) of the filter cartridge (10). The coded lip (82) is configured to block reception and mating of any filter cartridge whose roll seam defines a substantially annular space of incompatible radial configuration.</p> |
