Patent ID: 6090275
Filing Date: 2000-07-18
Classification: B01D

Abstract:
A liquid filter comprising:a barrel defining a cylindrical water chamber having a neck, said barrel comprising a top end sealed with a top cover plate, a bottom end sealed with a bottom cover plate, a clean water outlet near the top end, and a raw water inlet near the bottom end;a pneumatic cylinder securely mounted in a hole on said top cover plate and operated to reciprocate pressure means in and out of the neck of said cylindrical water chamber within said barrel;a perforated suspension board suspended in said cylindrical water chamber within said barrel above said neck, said perforated suspension board comprising a center through hole through which said pressure means passes into said neck, and a plurality of locating holes spaced around said center through hole;a filter element formed of bundles of fibers respectively suspended from the locating holes at said perforated suspension board;a weight board connected to said bundles of fibers and suspended in said cylindrical water chamber within said barrel below said neck; anda fabric filter suspended in said cylindrical water chamber within said barrel below said weight board;wherein said bundles of fibers are radially squeezed outwards by said pressure means when said pressure means is lowered into said neck, causing the density of said filter element to be increased.