Filtration container assemblies and methods

A filtration container assembly, the assembly comprising:

• (a) an outer container having a first open end and a second closed end and defining an inner cavity;
• and
• (b) a plunging assembly having a first end and a second end configured to be received within the outer container inner cavity, wherein the plunging assembly includes an inner sleeve having a first end and a second end and defining an inner bore, wherein the cross-sectional area of the inner sleeve is substantially the same at the first end and the second end, and a filtration assembly having a first end and a second end, wherein the first end of the filtration assembly is mechanically coupled to the inner sleeve at the second end of the inner sleeve, and wherein the second end of the filtration assembly is outside the inner bore of the inner sleeve, the plunging assembly including a device for pressure release located at or near the second end of the plunging assembly, the device for releasing pressure including a floating seal movable between first and second surfaces of the plunging assembly, the floating seal having a floating portion attached to a non-floating portion by a flexible coupling portion, wherein the floating portion is an o-ring seal and wherein the non-floating portion is coupled to the plunging assembly by nesting in an annular groove of the plunging assembly, and wherein the plunging assembly is configured to filter a liquid in the outer container as the liquid moves from the inner cavity of the outer container through the filtration assembly to the inner bore of the inner sleeve of the plunging assembly.

A method of filtering a liquid, the method comprising:

• (a) obtaining an outer container having an inner cavity with a first open end and a second closed end and filling at least a portion of the outer container with the liquid;
• (b) obtaining a plunging assembly having a first end and a second end, the plunging assembly including an inner sleeve having a first end and a second end and defining an inner bore, wherein the plunging assembly is configured to be received within the inner cavity of the outer container, wherein the inner sleeve has a continuous outer wall extending from the first end to the second end, and wherein the plunging assembly includes a filter having a first end and a second end, wherein the first end of the filter is mechanically coupled to the plunging assembly at the second end of the inner sleeve, and wherein the second end of the filter is outside the inner bore of the inner sleeve, the plunging assembly including a device for pressure release located at or near the second end of the plunging assembly, the device for releasing pressure including a floating seal movable between first and second surfaces of the plunging assembly, the floating seal having a floating portion attached to a non-floating portion by a flexible coupling portion, wherein the floating portion is an o-ring seal and wherein the non-floating portion is coupled to the plunging assembly by nesting in an annular groove of the plunging assembly;
• and
• (c) pressing the plunging assembly into the inner cavity of the outer container, such that the liquid flows from the inner cavity of the outer container through the filter and into the inner sleeve of the plunging assembly.

A filtration container assembly, the assembly comprising:

• (a) an outer container having a first open end and a second closed end and defining an inner cavity;
• and
• (b) a plunging assembly having a first end and a second end configured to be received within the outer container inner cavity, wherein the plunging assembly includes an inner sleeve having a first end and a second end and defining an inner bore, wherein the cross-sectional area of the inner sleeve is substantially the same at the first end and the second end, and a filtration assembly having a first end and a second end, wherein the first end of the filtration assembly is mechanically coupled to the inner sleeve at the second end of the inner sleeve, and wherein the second end of the filtration assembly is outside the inner bore of the inner sleeve, the plunging assembly including a device for releasing pressure from the inner cavity of the outer container, the device for releasing pressure including a floating seal movable between first and second surfaces of the plunging assembly, the floating seal having a floating portion attached to a non-floating portion by a flexible coupling portion, wherein the non-floating portion is coupled to the plunging assembly by nesting in an annular groove of the plunging assembly, and wherein the non-floating portion has a first end and a second end each in contact with the annular groove and a center portion extending therebetween, the distance between the first end and the second end of the non-floating portion defining a thickness of the non-floating portion, and wherein the floating seal includes the flexible coupling portion having a first end coupled to the non-floating portion and a second end coupled to the floating portion, a length extending between the floating portion and the non-floating portion, and a thickness, wherein the first end of the flexible coupling portion is coupled to the center portion of the non-floating portion, and wherein the thickness of the non-floating portion is greater than the thickness of the flexible coupling portion, and the floating portion having a first end and a second end configured for contact with the annular groove and a center portion extending therebetween, the distance between the first end and the second end of the floating portion defining a thickness of the floating portion, wherein the second end of the flexible coupling portion is coupled to the center portion of the floating portion, and wherein the thickness of the floating portion is greater than the thickness of the flexible coupling portion, and wherein the plunging assembly is configured to filter a liquid in the outer container as the liquid moves from the inner cavity of the outer container through the filtration assembly to the inner bore of the inner sleeve of the plunging assembly.

A filtration container assembly, the assembly comprising:

• (a) an outer container having a first open end and a second closed end and defining an inner cavity;
• and
• (b) a plunging assembly having a first end and a second end configured to be received within the outer container inner cavity, wherein the plunging assembly includes an inner sleeve having a first end and a second end and an outer wall defining an inner bore, wherein the outer wall is continuous from the first end to the second end, and a filtration assembly coupled to the inner sleeve at the second end of the inner sleeve, the plunging assembly including a device for releasing pressure from the inner cavity of the outer container, the device for releasing pressure including a floating seal movable between first and second surfaces of the plunging assembly, the floating seal having a floating portion attached to a non-floating portion by a flexible coupling portion, wherein the non-floating portion is coupled to the plunging assembly by nesting in an annular groove of the plunging assembly, wherein the non-floating portion has a first end and a second end each in contact with the annular groove and a center portion extending therebetween, the distance between the first end and the second end of the non-floating portion defining a thickness of the non-floating portion, and wherein the flexible coupling portion has a first end coupled to the non-floating portion and a second end coupled to the floating portion, a length extending between the floating portion and the non-floating portion, and a thickness, wherein the first end of the flexible coupling portion is coupled to the center portion of the non-floating portion, and wherein the thickness of the non-floating portion is greater than the thickness of the flexible coupling portion, and the floating portion having a first end and a second end configured for contact with the annular groove and a center portion extending therebetween, the distance between the first end and the second end of the floating portion defining a thickness of the floating portion, wherein the second end of the flexible coupling portion is coupled to the center portion of the floating portion, and wherein the thickness of the floating portion is greater than the thickness of the flexible coupling portion, and wherein the plunging assembly is configured to filter a liquid in the outer container as the liquid moves from the inner cavity of the outer container through the filtration assembly to the inner bore of the inner sleeve of the plunging assembly.