Patent ID: 6224754
Filing Date: 2001-05-01
Classification: B01D,F02M,Y10S

Abstract:
A filter head for use in cooperative engagement with an associated liquid filter constructed and arranged to filter unfiltered liquid to provide a filtered liquid; the filter head comprising:(a) a block member defining:(i) an inlet port constructed and arranged to permit fluid entry into the filter head;(ii) an inlet channel positioned for fluid communication between said inlet port and the associated liquid filter;(iii) a first outlet port constructed and arranged to permit fluid exit from the filter head;(iv) an outlet channel positioned for fluid communication between said first outlet port and the associated liquid filter to permit exit of the filtered liquid from the filter head; and(v) a second outlet port constructed and arranged to permit fluid exit from the filter head;(b) a first valve assembly, within said block member, having open and closed orientations;(i) said first valve assembly constructed and arranged to provide an exit for unfiltered liquid from the filter head;(ii) said first valve assembly comprising a first bore defined by said block member;(iii) said first valve assembly further comprising a first valve seat defined by said block member;(iv) said first valve assembly, when in said open orientation, providing fluid communication between said inlet channel and said second outlet port by way of a first passageway;(v) said first valve assembly, when in said closed orientation, blocking fluid communication between said inlet channel and said second outlet port by blocking the first passageway; and(c) a second valve assembly, within said block member, having open and closed orientations;(i) said second valve assembly constructed and arranged to provide an exit for filtered liquid from the filter head;(ii) said second valve assembly comprising a second bore defined by said block member; said first bore and said second bore being axially aligned;(iii) said second valve assembly further comprising a second valve seat defined by said block member; said first valve seat and said second valve seat being on opposite sides of a common wall defined by said block member;(iv) said second valve assembly, when in said open orientation, providing fluid communication between said outlet channel and said second outlet port by way of a second passageway;(v) said second valve assembly, when in said closed orientation, blocking fluid communication between said outlet channel and said second outlet port by blocking the second passageway.