Air oil separator
An air oil separator includes a removable and replaceable filter element. The filter element can include a flange-receiving recess in a first end cap construction. Alternatively, the first end cap construction can include alternating radially protruding projections and radially inward recesses. Alternatively, the end cap construction can include a first section contained within a plane and a second section sloping from the first section.
1. A filter element for an air oil separator; the filter element comprising:
(a) a tubular construction of filter media having opposite first and second ends and a longitudinal axis;
(b) a first end cap construction secured to the first end of the filter media; the first end cap construction including a flange-receiving recess therein; the first end cap construction including an axial plate and an annular sleeve extending perpendicular from the plate in a direction toward the filter media; the annular sleeve having an outer radial ring and an inner radial ring; the filter media being between the outer radial ring and the inner radial ring; and
(i) the outer radial ring defining the recess; the recess being a groove within the outer radial ring; the groove extending continuously from the axial plate to a free end of the outer radial ring in a direction parallel to the longitudinal axis.
2. The filter element of claim 1 wherein the recess has a cross-section with a shape of any one of: rounded, polygon, trapezoidal, curved, or irregular.
3. A filter element for an air oil separator; the filter element comprising:
a tubular construction of filter media having opposite first and second ends and a (a) longitudinal axis;
(b) a first end cap construction secured to the first end of the filter media; the first end cap construction including a flange-receiving recess therein; the first end cap construction includes an axial plate; wherein the recess is defined by the axial plate;
the axial plate having an upper surface and an opposite lower surface, the lower surface (c) facing the filter media;
(d) the recess being a continuous ring in the lower surface of the plate; the recess being radially spaced from each of the filter media and an outer periphery of the axial plate; and
(e) the upper surface of the plate including an axially extending rib forming a continuous ring; a lower surface of the rib defining the recess.
4. A filter element for an air oil separator; the filter element comprising:
(a) a tubular construction of filter media having opposite first and second ends and a longitudinal axis; and
(b) a first end cap construction secured to the first end of the filter media; the first end cap construction including a plurality of alternating radially outward projections and radially inward recesses;
wherein at least one of the projections extends radially outwardly more than a majority of a remainder of the projections.
5. The filter element of claim 4 wherein the first end cap construction includes an axial plate and an annular sleeve extending perpendicular from the plate in a direction toward the filter media; the annular sleeve having an outer radial ring and an inner radial ring; the filter media being between the outer radial ring and the inner radial ring.
6. The filter element of claim 5 wherein the alternating projections and recesses are along a radial outer periphery of the axial plate.
7. The filter element of claim 4 , wherein the projections and recesses are curved surfaces.
8. The filter element of claim 4 wherein only one of the projections extends radially outwardly more than all of a remainder of the projections.