Patent ID: 8425769

Claim:
A filter arrangement comprising: (a) a filter cartridge including a first filter element and a second filter element; (i) the first filter element including a first tubular section of filter media extending between first and second end caps and defining a first open filter interior; (ii) the second filter element including a second tubular section of filter media operably oriented in the first open filter interior; the second section of filter media being radially spaced from the first section of filter media to form an outflow passage for the first and second filter elements; the second tubular section of filter media extending between third and fourth end caps and defining a second open filter interior; the fourth end cap including an opening communicating with an inlet for the filter arrangement; the second and fourth end caps being positioned adjacent an end of the filter arrangement communicating with an outlet for the outflow passage; (iii) the first end cap defining an inner container and an outer container circumscribing the inner container; (A) the outer container being secured to the first tubular section of filter media; (B) the inner container having an end wall axially spaced from the outer container; (iv) the third end cap positioned adjacent to the first end cap and having a media end secured to the second tubular section of filter media; and (v) an inner bypass valve secured to the third end cap; (A) the inner bypass valve selectively allowing passage of fluid to the outflow passage of the filter arrangement without flowing through the second tubular section of filter media.