Fluid filter system

A filter endcap comprising:

• a first wall including a ring shape and including a radial inner portion, a radial outer portion, and a longitudinal axis;
• a flange disposed between the radial inner portion and the radial outer portion and projecting axially in a first direction;
• an inner seal member integrally connected to the flange, the inner seal member including a first portion engaged with an axial facing surface of the first wall and a second portion engaged with an inwardly radially facing surface of the flange;
• a inner cylindrically shaped wall projecting axially along the longitudinal axis opposite the first direction from the radial inner portion of the first wall;
• a ring shaped second wall disposed radially outward from the radial outer portion of the first wall and connected to the first wall by a plurality of arms, wherein the second wall, the plurality of arms, and the first wall cooperate to define a plurality of apertures;
• an outer seal member disposed adjacent the radially outermost edge of the second wall;
• an anti-prefill device configured to permit a fluid to flow in the first direction through an aperture of the first wall while reducing the flow of the fluid opposite the first direction through the aperture of the first wall;
• and
• wherein the anti-prefill device includes a cap portion connected to the first wall by a plurality of wall portions, wherein the plurality of wall portions establish a radially facing wall including apertures.

A filter assembly comprising:

• a first endcap including;
• a first wall including a ring shape and including a radial inner portion, a radial outer portion, and a longitudinal axis;
• a flange disposed between the radial inner portion and the radial outer portion and projecting axially in a first direction;
• an inner seal member integrally connected to the flange, the inner seal member including a first portion engaged with an axial facing surface of the first wall and a second portion engaged with an inwardly radially facing surface of the flange;
• a inner cylindrically shaped wall projecting axially opposite the first direction from the radial inner portion of the first wall;
• a ring shaped second wall disposed radially outward from the radial outer portion of the first wall and connected to the first wall by a plurality of arms, wherein the second wall, the plurality of arms, and the first wall cooperate to define a plurality of apertures;
• and
• an outer seal member disposed adjacent the radially outermost edge of second wall;
• wherein the second wall includes an axially extending wall that extends in the first direction away from the second wall to a free end, the axially extending wall forming an outer radial wall of the plurality of apertures;
• a sleeve including a first end and a second end, the first end engaging the inner cylindrically shaped wall of the first end cap;
• a filter medium disposed about the sleeve;
• and
• a second endcap connected to the second end of the sleeve.

A filter assembly comprising:

• a first endcap including;
• a first wall including a ring shape and including a radial inner portion, a radial outerportion, and a longitudinal axis;
• a flange disposed between the radial inner portion and the outer radial portion and projecting axially along the longitudinal axis in a first direction;
• an inner seal member integrally connected to the flange, the inner seal member including a first portion engaged with an axial facing surface of the first wall and a second portion engaged with an inwardly radially facing surface of the flange;
• a inner cylindrically shaped wall projecting axially along the longitudinal axis opposite the first direction from the radial inner portion of the first wall;
• a ring shaped wall disposed radially outward from the radial outer portion of the first wall and connected to the first wall by a plurality of arms, wherein the ring shaped wall, the plurality of arms, and the first wall cooperate to define a plurality of apertures;
• and
• an outer seal member disposed adjacent the radially outermost edge of the ring shaped wall;
• a sleeve including a first end and a second end, the first end engaging the cylindrically shaped wall of the first end cap;
• a filter medium disposed about the sleeve;
• a second endcap connected to the second end of the sleeve;
• an anti-prefill device configured to permit a fluid to flow in the first direction through an aperture of the first wall while reducing the flow of the fluid opposite the first direction through the aperture of the first wall;
• and
• wherein the anti-prefill device includes a cap portion connected to the first wall by a plurality of wall portions, wherein the plurality of wall portions establish a radially facing wall including apertures.

A filter assembly comprising:

• a sleeve extending along a longitudinal axis of the filter assembly, the sleeve having a first end and a second end, the sleeve extending in a first direction from its second end to its first end;
• a filter medium disposed about the sleeve;
• a first endcap engaged to the first end of the sleeve, the first endcap including a first wall with a radial inner portion and a radial outer portion, wherein the first endcap has an aperture radially inward of the radial inner portion of the first wall, the aperture being in fluid communication with the first end of the sleeve;
• and
• an anti-prefill device configured to permit a fluid to flow through the aperture in the first direction while reducing a flow of fluid through the aperture opposite the first direction, wherein the anti-prefill device includes a cap portion connected to the first wall by a plurality of wall portions, wherein the plurality of wall portions establish a radially facing wall including apertures.

A filter assembly comprising:

• a sleeve extending along a longitudinal axis of the filter assembly, the sleeve having a first end and a second end, the sleeve extending in a first direction from its second end to its first end;
• a filter medium disposed about the sleeve;
• a first endcap engaged to the first end of the sleeve, the first endcap including
• a first wall including a radial inner portion and a radial outer portion;
• a ring shaped wall disposed radially outward from the radial outer portion of the first wall and connected to the first wall by a plurality of arms, wherein the ring shaped wall, the plurality of arms, and the first wall cooperate to define a plurality of apertures;
• and
• an axially extending wall attached to and extending away from the ring shaped wall in the first direction to a free end, the axially extending wall forming an outer radial wall of the plurality of apertures.

A filter assembly comprising:

• a sleeve extending along a longitudinal axis of the filter assembly, the sleeve having a first end and a second end, the sleeve extending in a first direction from its second end to its first end;
• a filter medium disposed about the sleeve;
• a first endcap engaged to the first end of the sleeve, the first endcap including a first wall with a radial inner portion and a radial outer portion;
• and
• an anti-prefill device, the anti-prefill device including a cylindrical wall including a first end and a second end, the first end connected to the first wall, the second end spaced apart from first wall in the first direction.