초록 ▼

A filter apparatus has a filter housing having suspended therein a filter element. The filter element includes a plurality of hollow threads made from a high molecular weight polymeric material. The threads are characterized by being porous and flexible as well as being closed at the bottom. The fil

A filter apparatus has a filter housing having suspended therein a filter element. The filter element includes a plurality of hollow threads made from a high molecular weight polymeric material. The threads are characterized by being porous and flexible as well as being closed at the bottom. The filter apparatus further has at least one baffle within the housing to cause turbulence in the liquid to filtered. The inside of each hollow thread is at a lower pressure than the liquid on the outside, so that the filtrate can enter through the porous membrane of the threads while leaving solid matter behind. The open tops of the threads are in communication with an opening in the filter housing through which filtrate, free of solid material, may be removed.

대표청구항 ▼

In a filter apparatus comprising a cylindrical housing adapted to have a liquid to be filtered introduced under pressure at the top and directed towards the bottom thereof, and wherein a filter element is suspended at its upper end from the top of said housing, said filter element being in open comm

In a filter apparatus comprising a cylindrical housing adapted to have a liquid to be filtered introduced under pressure at the top and directed towards the bottom thereof, and wherein a filter element is suspended at its upper end from the top of said housing, said filter element being in open communication with an outlet from said housing, the improvement comprising: a. said filter element comprising a plurality of high molecular weight polymeric hollow threads, said threads being open at the top and closed at the bottom and, further, being porous and flexible, and wherein the interior of each thread is at a lower pressure than the liquid to be treated which is within said housing; b. at least one baffle disposed within said housing and protruding inwardly from the inner surface thereof to cause turbulence in said liquid to be filtered, said turbulence causing said hollow threads of said filter element to constantly move laterally back and forth during the filteration process; c. means defining an inlet for introducing liquid to be treated into the top of said cylindrical housing essentially tangentially to the inner surface thereof; d. a rotatable annular baffle having blades on its outer face and means defining a plurality of openings at regular intervals about its circumference, said rotatable annular baffle being so disposed within said cylindrical housing as to be caused to rotate about its axis by impingement of the stream of liquid entering said housing upon said blades; and e. a fixed annular baffle within the circumference of said rotatable annular baffle and on a common axis therewith, said fixed annular baffle having means defining a plurality of openings at regular intervals about its circumference.