Patent ID: 6644515
Filing Date: 2003-11-11
Classification: B01D,F16K,Y10T

Abstract:
A filter-valve assembly for exhausting fumes from a liquid container, said filter valve assembly comprising:a valve housing assembly having a first end for being attached to a filter-cartridge assembly and a second end for being attached to said liquid container, said valve housing assembly defining a valve -cavity having exit and entrance passages respectively at said first and second ends for communicating with said filter-cartridge assembly and said liquid container, and including a filter-cartridge attaching mechanism at said exit passage for attaching said filter-cartridge assembly to said valve-housing assembly at said first end, and a liquid-container attaching mechanism at said entrance passage for attaching said valve-housing assembly to said liquid container at said second end; and a mounting-valve unit in said valve cavity, said mounting-valve unit comprising a valve seat, a valve poppet for being seated against said valve seat in a closed position for preventing fluid flow between said entrance and exit passages and for being moved away from said valve seat in an open position for allowing fluid flow between said entrance and exit passages, and a resilient member for biasing said valve poppet against said valve seat to the closed position; wherein said valve poppet is moved to said open position in response to said filter-cartridge assembly being attached to said valve-assembly housing by said filter-cartridge attaching mechanism and is allowed to be moved to said closed position by the resilient member in response to said filter-cartridge assembly being detached from said valve housing; and wherein said mounting-valve poppet has a finger extending along said exit passage and wherein said filter-cartridge attaching mechanism at said exit passage engages a neck of said filter-cartridge assembly, wherein when said neck is engaged by said filter-cartridge attaching mechanism said neck comes into contact with said finger and moves said mounting-valve poppet away from said valve seat.