초록

A filter element includes outer and inner sleeves made from a flexible, pervious material. The inner sleeve, which is arranged substantially concentric with respect to the outer sleeve, employs one or more handles to facilitate the removal of the filter element from an associated filter housing.

대표청구항 ▼

What is claimed is: 1. A filter element, comprising an outer sleeve made from a flexible, pervious material and having an open upper end and a lower end; an inner sleeve arranged substantially concentric with respect to said outer sleeve and having a closed upper end and a lower end, said inner sle

What is claimed is: 1. A filter element, comprising an outer sleeve made from a flexible, pervious material and having an open upper end and a lower end; an inner sleeve arranged substantially concentric with respect to said outer sleeve and having a closed upper end and a lower end, said inner sleeve being made from a flexible, pervious material, said upper end of said inner sleeve being detached from said upper end of said outer sleeve; attaching means for attaching said lower end of said inner sleeve to said lower end of said outer sleeve; and removal means for facilitating the removal of said filter element from an associated filter housing, said removal means including at least one handle attached to said inner sleeve but not attached to said outer sleeve, and at least one handle attached to said outer sleeve but not attached to said inner sleeve. 2. The filter element of claim 1, wherein said at least one inner sleeve handle includes a first handle and a second handle, said first and second handles being attached to said upper end of said inner sleeve. 3. The filter element of claim 2, wherein each of said first handle and said second handle is made from the same flexible, pervious material as said inner sleeve. 4. The filter element of claim 3, wherein said removal means further includes a third handle and a fourth handle, said third and fourth handles being connected to said upper end of said outer sleeve. 5. The filter element of claim 4, further comprising a collar connected to said upper end of said outer sleeve, said third and fourth handles being attached to said collar. 6. The filter element of claim 5, wherein said first and second handles are attached to said inner sleeve such that said inner sleeve can be moved by said first and second handles substantially independent of said outer sleeve. 7. The filter element of claim 1, wherein said attaching means includes an end cap connected between said lower end of said inner sleeve and said lower end of said outer sleeve. 8. The filter element of claim 7, wherein said inner sleeve is mounted within said outer sleeve so as to form a space between said inner and outer sleeves, said end cap including at least one opening in communication with said space and a lining made of a pervious material and positioned over said at least one opening. 9. The filter element of claim 1, further comprising a cap attached to said upper end of said inner sleeve, said at least one inner sleeve handle being attached to said cap. 10. The filter element of claim 9, wherein said at least one inner sleeve handle includes a first handle and a second handle, said first and second handles being mounted to said cap. 11. The filter element of claim 10, wherein said cap includes a top wall and a center portion extending upwardly from said top wall. 12. The filter element of claim 11, wherein each of said first handle and said second handle protrudes radially outwardly from said center portion and has an end attached to said top wall. 13. The filter element of claim 12, wherein said first handle and said second handle protrude radially outwardly from said center portion in opposite directions. 14. The filter element of claim 13, wherein said cap has a skirt depending from said top wall and attached to said upper end of said inner sleeve. 15. A filter element, comprising an outer sleeve made from a flexible, pervious material and having an open upper end and a lower end; an inner sleeve arranged substantially concentric with respect to said outer sleeve and having a closed upper end and a lower end, said inner sleeve being made from a flexible, pervious material, said upper end of said inner sleeve being detached from said upper end of said outer sleeve; attaching means for attaching said lower end of said inner sleeve to said lower end of said outer sleeve; removal means for facilitating the removal of said filter element from an associated filter housing, said removal means including at least one handle; and a cap having a substantially planar wall and at least one flange extending outwardly therefrom, said cap being attached to said upper end of said inner sleeve and to said at least one handle, and wherein said at least one handle is sized and shaped so as to move between a retracted position, in which said at least one handle is positioned substantially flat against said wall, and an extended position, in which said at least one handle projects upwardly from said wall. 16. The filter element of claim 15, wherein said removal means includes another handle attached to said upper end of said outer sleeve, said at least one flange being engageable with said another handle when said at least one handle is pulled upwardly to remove said filter element from an associated filter housing. 17. The filter element of claim 1, wherein said outer sleeve and said inner sleeve are movable independent of each other. 18. A filter assembly, comprising a filter element including an outer sleeve and an inner sleeve, said outer sleeve being made from a flexible, pervious material and having an open upper end and a lower end, said inner sleeve being arranged substantially concentric with respect to said outer sleeve and having a closed upper end and a lower end, said inner sleeve being made from a flexible, pervious material, said upper end of said inner sleeve being detached from said upper end of said outer sleeve, said filter element including attaching means for attaching said lower end of said inner sleeve to said lower end of said outer sleeve and removal means for facilitating the removal of said filter element from an associated filter housing, said removal means including at least one handle attached to said inner sleeve but not attached to said outer sleeve, and at least one handle attached to said outer sleeve but not attached to said inner sleeve; and supporting means for supporting said filter element in a filter housing. 19. The filter assembly of claim 18, wherein said supporting means includes a basket having an outer member, which is sized and shaped so as to support said outer sleeve of said filter element, and an inner member, which is arranged concentric with respect to said outer member and is sized and shaped so as to support said inner sleeve of said filter element. 20. The filter assembly of claim 19, wherein said basket includes a dome having an outer portion attached to said inner member, a groove extending across said dome, and another handle positioned across said groove so as to facilitate removal of said basket from an associated filter housing.