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Filter with initially flat membrane and curved membrane support

  • US 4,319,996 A
  • Filed: 11/10/1980
  • Issued: 03/16/1982
  • Est. Priority Date: 11/10/1980
  • Status: Expired due to Term
First Claim
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1. A filter device comprising a housing having an inlet chamber with a fluid inlet opening and an outlet chamber with a wall having a fluid outlet opening, a deformable filter membrane separating said chambers and sealed to said housing, said outlet chamber containing a perforated membrane support surface of concave compound curvature spaced from the wall of the outlet chamber, said membrane being held by said housing so as to be initially flat and spaced from said support surface, said membrane being sufficiently deformable so as to be forced into contact with and conform to the compound curvature of said support surface under normal transmembrane pressure when fluid flows through the membrane from said inlet chamber to said outlet chamber.

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