| 摘要 |
Length-adjustable filter cartridges are provided which in preferred embodiments include at least one length-adjustable end cap attached to an end of a generally cylindrical filter body. The length-adjustable end cap most preferably includes an annular stationary ring member which is attached to one end of the filter body, and a moveable connection member slideably received within said annular stationary ring member so as to be moveable longitudinally relative thereto. A seal is formed between the stationary ring member and the moveable connection member so as to seal against fluid leakage yet permit relative axial movement (length adjustment) therebetween. In use, the filter cartridges may be adapted to fit conventional standardized bag filter cartridge housings even though the physical size and/or geometries of the metal support basket thereof is non-standard. That is, a filter cartridge having the length-adjustable end cap of the present invention may be positioned within a standard sized bag filter cartridge housing, whereby the length-adjustable end cap may be longitudinally moved until the filter cartridge length corresponds substantially to that of the surrounding metal support basket in which it is placed. As such, the bottom end cap of the filter cartridge is ensured to be supported by the metal basket to prevent it from rupturing during normal use.
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