Push filter with floating key lock

A filter housing assembly comprising:

• a filter housing for enclosing a filter media, the filter housing having two ports for ingress and egress in fluid communication with said filter media, the filter housing having a filter head forming a fluid-tight seal with the filter housing, and a first attachment structure for receiving a filter key;
• and
• said filter key having a top surface, a bottom, longitudinal sides, and lateral sides, said filter key including:
• a plurality of spaced protrusions or fingers on each longitudinal side of said filter key extending laterally from said top surface and having winged extensions;
• and
• a second attachment structure located on said filter key bottom for attaching said filter key to said first attachment structure on said filter housing.

A filter base in combination with a filter housing assembly, said combination comprising:

• a filter base having an ingress port and an egress port on a base platform;
• a slidable floating lock in slidable contact of said filter base, said floating lock having a plurality of drive keys or lateral extensions separated by gaps;
• a resilient member in contact with said floating lock, providing a retraction force for said floating lock;
• a filter housing assembly including a longitudinal side portion and a top portion having a filter head, a first attachment structure and an elongated protrusion extending from said longitudinal side portion or a side of said top portion or both, and at least one protruding angled ramp segment for complementary mating with said angled ramp segment on said filter key;
• and
• a filter key located on said filter housing assembly, said filter key having longitudinal sides and lateral sides, said filter key including:
• a plurality of spaced protrusions or fingers on each longitudinal side of said filter key extending laterally from said top surface, wherein said fingers include winged extensions having slanted or angled faces for mating attachment to a filter base or manifold;
• a second attachment structure having a groove complementary to said elongated protrusion for insertably securing said filter key to said filter head top surface by slidably mating said elongated protrusion of said filter head within said groove;
• and
• an indented angled ramp segment on at least one bottom edge.

A filter cartridge comprising:

• a filter housing for enclosing a filter media, the filter housing having a body and a top portion for forming a fluid-tight seal with the body, a filter housing axis extending in an axial direction along the filter housing, the filter housing top portion including:
• an ingress port;
• an egress port;
• and
• a filter key located on or connected to the filter housing and having a top surface, longitudinal sides, and lateral sides shorter than the longitudinal sides, the filter key having a protrusion extending in a direction parallel to the filter key lateral sides, wherein the protrusion includes on one side a slanted or angled face angled with respect to the filter housing axis, and on an opposing side a face having a substantially straight edge parallel to the filter housing axis.

A filter cartridge comprising:

• a filter housing for enclosing a filter media, the filter housing having a body and a top portion for forming a fluid-tight seal with the body, an axis extending in an axial direction along the filter housing, the filter housing including:
• an ingress port;
• an egress port;
• and
• a filter key located on or connected to the filter housing for mating attachment to a filter base or manifold, the filter key having a top surface, longitudinal sides, and lateral sides shorter than the longitudinal sides, the filter key having an attachment finger extending in a direction parallel to the filter key lateral sides, wherein the attachment finger includes laterally facing opposing side faces, wherein one opposing side face forms a first angle with the filter housing axis and the other opposing side face forms a second angle with the filter housing axis, such that the first angle and the second angle are not equal.