Patent ID: 7931725

Claim:
A filter apparatus comprising: a filter housing and a filter element disposed in the filter housing; the filter housing defining a longitudinal axis of the filter apparatus and having an inner surface defining a cavity extending along the axis and having a housing inlet at one axial end of the cavity and a housing outlet at an opposite axial end of the cavity; the inner surface of the filter housing including at least first and second sections thereof, with the first section extending axially from the inlet and defining a first substantially radially inwardly facing surface, and the second section being axially disposed between the first section and the outlet, the second section protruding radially inward beyond the first section and defining a second substantially radially inward facing surface; the filter element defining an outer peripheral surface thereof extending axially from an inlet end to an outlet end of the filter element, and an outlet end portion of the filter element disposed at least partially within the second section; the filter element including a media pack having a plurality of alternating layers of a face sheet material and a convoluted filter material, with the alternating layers forming substantially longitudinally oriented flutes extending to the outlet end of the filter element for passage of a fluid through the filter element; the filter element also including a radially acting seal attached to the outlet end portion of the filter element and axially spaced from the outlet end of the filter element a distance such that the longitudinally oriented flutes of the filter pack extend axially along the seal and at least partially along the second substantially radially inwardly facing surface of the housing when the seal is acting against one of the first or second substantially radially inwardly facing surfaces.