Pall Corporation

Mark W Johnson

Stephen A Geibel

Tanweer Ul Haq

Riazuddin S Rahimi

The present invention provides a filter sealing device for a filter element. The filter element includes an end portion defining an opening. The sealing device includes a body having a first section attached to a second section. The first section is positionable within the opening in the filter element with the second section facing an open end portion of the filter element. The first section has a larger coefficient of thermal expansion than the end portion of the filter element so that an increase in temperature results in the first section of the body expanding at a greater rate than the end portion of the filter element. These differing rates of expansion cause a compressive force to be exerted between the first section of the body and the end portion of the filter element.

Filter assembly having a filter element and a sealing device

A filter assembly includes a housing having an inlet and an outlet, at least two filter elements stacked inside the housing, and a spacer positioned between the filter elements. The spacer includes a body having an opening which is larger than the inner diameter of at least one of the filter elements and is no smaller than about one-third of the outer diameter of a filter element. The spacer is free of any structure which extends into the opening.

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Taylor, NY, United States of America

Mark W Johnson