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Liquid Purification

Filter-assembly-with-an-expandable-shell

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Filter assembly with an expandable shell

Details

Inventors: Reed, Clayton L.;
Assignee: Pall Corporation (Glen Cove, NY)
Primary Examiner: Fisher; Richard V.
Assistant Examiner: Millard; Wanda L.
Attorney, Agent or Firm: Leydig, Voit & Mayer

The disclosure describes a fluid container comprising a fluid vessel which includes a generally cylindrical and expandable shell and a support structure which includes a generally cylindrical and rigid casing that is coaxially disposed about the shell of the fluid vessel. The shell has first and second end portions, and the casing has first and second end portions cooperatively arranged with the first and second end portions of the shell. The fluid vessel further includes first and second end caps sealed to the first and second end portions of the shell, respectively. At least one end cap has an opening which allows the fluid to flow into or out of the shell. Further, at least the first end portion of the shell has a continuously decreasing outside diameter along the axis of the shell, and the first end portion of the casing has a correspondingly continuously decreasing inside diameter. With a filter element disposed within the shell, the container may be used as a filter assembly.

DETAILED DESCRIPTION The present invention provides an improved container.
For example, a container embodying the present invention may be configured to compensate for expansion due to the effect of a high pressure or a high temperature fluid.
The present invention has many applications including, for example, applications in the filtering art.
Accordingly, the present invention further provides a filter assembly for removing one or more substances from a fluid.
The filter assembly comprises a generally cylindrical shell having first and second end portions, first and second end caps sealed to the first and second end portions of the shell, respectively, and a porous filter element disposed within the shell adjacent to the first end cap.
At least one end portion of the shell has a continuously decreasing outside diameter along the axis of the shell.
The filter element has upstream and downstream surfaces and a structure for directing fluid from the upstream surface to the dowmstream surface, thereby filtering the fluid.
The filter assembly further comprises an inlet for channeling the fluid into the shell to the upstream surface of the filter element and an outlet for channeling the fluid from the downstream surface of the filter element out of the shell.
Additionally, the filter assembly comprises a rigid casing coaxially fitted abiout the shell.
The casing has first and second end portions cooperatively arranged with the first and second end portions of the shell.
The end portion of the casing, which is cooperatively arranged with the end portion of the shell that has the continuously decreasing outside diameter has a correspondingly continuously decreasing inside diameter.
Thus, the present invention further provides a filter assembly which effectively filters the fluid as it flows through the filter assembly and at the same time is capable of withstanding the forces due to elevated fluid pressures and temperatures.
With the shell and end caps supported within the rigid casing, a filter assembly embodying the present invention can tolerate large amounts of expansion due to fluid pressure or temperature without undue distortion or failure

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