Patent ID: 8663470
Filing Date: 2014-03-04
Classification: B01D,F01M

Abstract:
1. A filter cartridge for filtering a liquid, the cartridge comprising an outer casing defining an inside volume; a filter element contained in said inside volume of the outer casing, the filter element separating said inside volume into an upstream space and a downstream space, wherein the casing includes an end wall defining at least one liquid inlet passage communicating with the upstream space, and a liquid outlet passage communicating with the downstream space, the liquid outlet passage of the end wall being central and provided with a thread, said casing being adapted to be mounted on a threaded support that includes a liquid inlet channel designed to communicate with the inlet passage, a liquid outlet channel designed to communicate with the outlet passage, and a drain channel communicating with the inlet passage, wherein the cartridge includes a closure member fastened to said end wall of the casing; wherein the closure member extends entirely outside said inside volume and includes an annular side wall, the side wall of the closure member including a first end disposed adjacent to the end wall and a second end disposed remote from the end wall, said annular side wall extending around a central axis between the first end and the second end, the first end of the sidewall disposed to form an axial clearance with respect to the end wall so that the closure member is axially movable with respect to the end wall between a proximal position disposed toward the end wall and a distal position disposed away from the end wall; the end wall including an annular sealing bearing surface surrounding the side wall and adapted to come into sealing contact with the support; and wherein the second end of the side wall of the closure member is extended radially inwards by an inwardly-directed collar; and wherein the filter cartridge comprises a resilient member arranged between the end wall and a portion of the closure member remote from the end wall, whereby the closure member is resiliently biased away from the end wall.