| 摘要 |
<p>The present invention is a filter cartridge having a detachable alignment fin (10) mounted to the closed end of the cartridge. The fin may be formed as part of the end cap and have a device for its removal such as a series of perforations or one or more score lines formed at the intersection of the end cap end surface and the fin. Alternatively, the end cap may contain a retainer (31) for holding the fin to the cap if and when desired. The retainer may be a threaded device, a locking lug or bayonet device or a snap-fit ring device. It may be raised above the surface of the cap such as on a pedestal or recessed within the cap so long as it does not interfere with the sealing integrity of the cap. Alternatively it may be snap fit on to or over the end cap. These embodiments also allow for the use of various fin designs that can be used to optimize fluid flow characteristics. Optionally, there is provided a flat cap attachment that is used when no fin is attached so as to provide the flow characteristics as a flat cap filter.</p> |
