Patent ID: 6830683
Filing Date: 2004-12-14
Classification: B01D

Abstract:
A filter assembly comprising:a filter cartridge having a neck on one end defining a liquid flow passage, the filter cartridge insertable into and contained in use in an open-ended housing, said housing including an inner wall, an enclosing end cap to which said housing is demountably and sealably attached, said end cap including an integral sleeve which surrounds the neck of the cartridge in the attached position and provides therewith a liquid-tight seal; a brine ring attached to said inner wall of the housing adjacent the open end thereof, said brine ring including an inner cylindrical surface; a retaining ring secured to and surrounding the neck of the filter cartridge and in direct contact with and secured to the neck prior to insertion of the cartridge into the housing, said retaining ring including an outer cylindrical surface slidingly received within the inner cylindrical surface of the brine ring upon insertion of the cartridge into the housing, said retaining ring outer surface carrying a seal that engages and provides a liquid-tight intermediate brine seal in the interface with the inner cylindrical surface of the brine ring; and, a coupling part on each of the retaining ring and the brine ring cooperating to lock the cartridge within the housing; whereby, when the housing is demounted from the end cap, the filter cartridge neck is pulled from the integral sleeve, and the housing and cartridge are removable together.