Filtration element with gradient seal interface

A liquid filtration system, comprising:

• a filter head comprising a skirt, the skirt having a ramp disposed at a first end of the skirt;
• a shell housing coupled to the filter head;
• and
• a filter cartridge disposed within the shell housing, the filter cartridge comprising:
• a filter media pack;
• and
• an endcap coupled to a first end of the filter media pack, the endcap comprising an interface member extending from an upper surface of the endcap, the interface member comprising a sealing member that is at least partially tilted at an oblique angle with respect to a central axis of the filter cartridge, the sealing member sealingly engaged with the skirt, wherein the endcap includes an anti-rotation member engaging the interface member and extending radially away from the interface member such that when the shell housing is fully installed onto the filter head the anti-rotation member is engageable with the ramp with no radial gap between the ramp and the interface member, and wherein the anti-rotation member is a rectangular-shaped tab extending radially outward from the interface member and upwardly from the upper surface in a substantially perpendicular orientation relative to the upper surface.

A liquid filtration system, comprising:

• a filter head comprising a skirt, the skirt having a ramp disposed at a first end of the skirt;
• a shell housing coupled to the filter head;
• and
• a filter cartridge disposed within the shell housing, the filter cartridge comprising:
• a filter media pack;
• and
• an endcap coupled to a first end of the filter media pack, the endcap comprising:
• an interface member extending from an upper surface of the endcap, the interface member comprising a sealing member that is at least partially tilted at an oblique angle with respect to a central axis of the filter cartridge, the sealing member sealingly engaged with the skirt, wherein the skirt further comprises a first inner surface and a second inner surface, wherein an inner diameter of the second inner surface is less than an inner diameter of the first inner surface, and wherein a transition between the first inner surface and the second inner surface is oriented parallel to the sealing member.

A liquid filtration system, comprising:

• a filter head comprising a skirt, the skirt having a ramp disposed at a first end of the skirt;
• a shell housing coupled to the filter head;
• and
• a filter cartridge disposed within the shell housing, the filter cartridge comprising:
• a filter media pack;
• and
• an endcap coupled to a first end of the filter media pack, the endcap comprising:
• an interface member extending from an upper surface of the endcap, the interface member comprising a sealing member that is at least partially tilted at an oblique angle with respect to a central axis of the filter cartridge, the sealing member sealingly engaged with the skirt, wherein the skirt further comprises a seal disruptor that comprises a rib or an indentation, the seal disruptor extending downwardly from a second end of the skirt toward the filter cartridge.

A liquid filtration system, comprising:

• a filter head comprising a skirt, the skirt having a ramp disposed at a first end of the skirt;
• a shell housing coupled to the filter head;
• and
• a filter cartridge disposed within the shell housing, the filter cartridge comprising:
• a filter media pack;
• and
• an endcap coupled to a first end of the filter media pack, the endcap comprising:
• an interface member extending from an upper surface of the endcap, the interface member comprising a sealing member that is at least partially tilted at an oblique angle with respect to a central axis of the filter cartridge, the sealing member sealingly engaged with the skirt, wherein a first portion of the sealing member is tilted at a first angle, and wherein a second portion of the sealing member is tilted at a second angle that is different from the first angle.

A method, comprising:

• providing a filter head, the filter head comprising a skirt, the skirt having a ramp at a first end of the skirt, the ramp defining a stepwise transition in an axial height of the skirt;
• providing a shell housing;
• providing a filter cartridge, the filter cartridge comprising a filter media pack and an endcap coupled to a first end of the filter media pack, the endcap comprising an interface member extending from an upper surface of the endcap, the interface member comprising a sealing member that is tilted at an oblique angle with respect to a central axis of the filter cartridge;
• joining the filter cartridge to the shell housing;
• and
• installing the shell housing onto the filter head to sealingly engage the sealing member to the skirt.