Inertial filter of the porous metal type
OwnerLambert H. Mottinventor
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Abstract
A porous filter is formed of sintered metal particles and is characterized by having sintered metal particles of relatively large size throughout and a thin subsurface area adjacent the upstream surface containing sintered metal particles of relatively small size, thus providing a thin area of relatively small pore size adjacent the upstream surface while the remaining major portion of the filter has a relatively large pore size. The filter is particularly useful as an inertial filter and as a support for reverse osmosis membranes.
Claims9
An inertial type filter element comprising a porous wall composed of sintered metal particles in the size range of 0.5 to 44 microns and having a subsurface section not exceeding about 0.015 inches in thickness adjacent its upstream surface having a smaller pore size formed by finer metal particles in the size range of 0.02 to 0.5 microns which are deposited and sintered therein.
Dependencies are inferred from the claim text.