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US 4,052,316 AGranted
Composite coalescing filter tube
AssigneeFinite Filter Company
InventorsLeo Joseph Berger, Jr., Denis D. Guequierre
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AssigneeFinite Filter Company
InventorsLeo Joseph Berger, Jr., Denis D. Guequierre
Estimating the term…
The specification discloses a novel composite coalescing filter tube and the method of making the same. In contrast to previous coalescing filters, which had layers of filter material sandwiched between relatively rigid support members, the present invention provides for a completely unitary coalescing filter tube wherein the various layers of the filter are successively vacuum formed one over the other on a forming fixture which is submerged in an appropriate glass fiber slurry mix, with the various layers being air dried, epoxy dipped, and cured as needed for the particular application. Since, during the vacuum forming process, glass fibers from one layer will interlock with glass fibers from the previously formed layer, a completely unitary coalescing filter tube is formed, preventing the problems of filter layer separation, channeling, pressure collapse and vibration damage which have occurred in past coalescing filters.
A vacuum formed highly porous pre-filter support tube formed of randomly oriented glass fibers being bound together by a cured epoxy binder and having a perforated rigid retaining tube surrounding the porous pre-filter support layer, and being in intimate interlocking contact therewith at all points of contact along the boundary between said rigid support tube and said pre-filter support tube.
A vacuum formed unitary highly porous composite coalescing filter tube comprising a porous inner pre-filter support tube formed of randomly oriented glass fibers surrounded by an outer porous filter coalescing tube, also formed of randomly oriented glass fibers and being in intimate interlocking contact with said porous pre-filter layer at all points of contact therewith.
A porous coalescing filter tube formed of randomly oriented glass fibers being bound together by a cured epoxy resin, and including a rigid, unitary, seamless, perforated plastic retaining tube surrounding the coalescing filter and being in intimate interlocking contact with said coalescing filter at all points of contact along the boundary between said retaining tube and said coalescing filter tube.
A coalescing filter tube formed of randomly oriented glass fibers being bound together by a cured epoxy resin, and including a rigid perforated metal retaining tube surrounding the outer coalescing filter layer and being in intimate interlocking contact with said coalescing filter layer at all points of contact along the boundary between said metal retaining tube and said filter layer.
Dependencies are inferred from the claim text.