초록 ▼

A filter includes a casing enclosing a filter cartridge and a removable collection bowl. The filter cartridge includes a filter media ring with upper and lower end caps. The lower end cap of the filter cartridge has a ring-shaped member projecting axially downward. The ring-shaped member has an annu

A filter includes a casing enclosing a filter cartridge and a removable collection bowl. The filter cartridge includes a filter media ring with upper and lower end caps. The lower end cap of the filter cartridge has a ring-shaped member projecting axially downward. The ring-shaped member has an annular portion with radially inward-directed threads, whereby the collection bowl, with radially outward-directed threads, can be removably attached to the cartridge. The ring-shaped member further includes radial flow passages between the threads and the end cap, whereby contaminants may pass from a peripheral region of the filter element interiorly of the ring-shaped member and downwardly into the attached collection bowl. The filter includes an anti-rotation feature, comprising radially outward-directed keys, disposed circumferentially around the annular portion of the ring-shaped member and projecting radially-outward therefrom, and slots formed on the inside surface of the casing. The keys and slots rotationally fix the filter cartridge with respect to the casing when the cartridge is installed in the casing, such that the collection bowl can be threaded onto and off of the cartridge. The collection bowl and ring-shaped member trap a radially-inward directed portion of the casing and a resilient gasket to fluidly-seal the collection bowl to the cartridge.

대표청구항 ▼

[ What is claimed is:] [1.] A filter cartridge, comprising:a ring of filter media circumscribing a central cavity and having upper and lower ends,an upper end cap sealingly engaging the upper end of the filter media, and a lower end cap with an upper surface sealingly engaging the lower end of the f

[ What is claimed is:] [1.] A filter cartridge, comprising:a ring of filter media circumscribing a central cavity and having upper and lower ends,an upper end cap sealingly engaging the upper end of the filter media, and a lower end cap with an upper surface sealingly engaging the lower end of the filter media, and a ring-shaped member attached to and projecting axially downward away from a lower surface of the second end cap, said ring-shaped member having an annular portion with threads whereby a collection bowl with threads can be removably connected to the ring-shaped member, said ring-shaped member further including radial flow passages whereby contaminants may pass from a peripheral region of said filter cartridge interiorly of said ring-shaped member and downwardly into the attached collection bowl; and said ring-shaped member further including an anti-rotation device disposed on the annular portion, whereby said anti-rotation device can mate with a corresponding anti-rotation device on a casing to rotationally fix the filter cartridge with respect to the casing, wherein said anti-rotation device on said annular portion comprises at least one radially-outward projecting key disposed on a radially-outer surface of the annular portion.