04906372 is referenced by 44 patents and cites 4 patents.

A reverse osmosis or ultrafiltration separation device for treating a liquid feed wherein a separation assembly is wound spirally about a central permeate-carrying tube. The assembly includes an elongated semipermeable membrane envelope which includes an interior permeate passageway and feed-passageway-providing sheet material spirally wound with said envelope to supply a liquid feed to be treated. A cylindrical housing of circular cross section having an inlet and a pair of outlets holds the spiral wound separation assembly which is tightly surrounded by a seamless, highly porous, rigid, tubular sleeve proportioned to be snugly received within the cylindrical housing. The sleeve has a predetermined thickness relative to the diameter of the housing chamber so that a desired amount of bypass flow of liquid occurs through the space generally occupied by the sleeve.

Title
Spiral-wound membrane cartridge
Application Number
7/352999
Publication Number
4906372
Application Date
May 17, 1989
Publication Date
March 6, 1990
Inventor
David H Hopkins
Escondido
CA, US
Agent
Fitch Even Tabin & Flannery
Assignee
Desalination Systems
CA, US
IPC
B01D 27/00
B01D 13/00
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