Filter assembly

Abstract

A filter assembly comprises a filter housing ( 23 ) into which a filter element is insertable. A core element ( 38 ) is provided extending within the housing ( 23. The filter assembly comprises a coupling assembly ( 200 ) that is insertable into the housing ( 23 ), the coupling assembly ( 200 ) comprising a leaf spring ( 201 ) having a span larger than an internal diameter of the filter housing ( 23 ), such that when the leaf spring ( 201 ) is inserted into the filter housing ( 23 ) the outer edge of the leaf spring ( 201 ) engages an inner surface of the filter housing ( 23 ) and the leaf spring ( 201 ) bulges in the direction of insertion of the leaf spring into the housing, preventing removal of the leaf spring, in a direction opposite to the insertion direction, from the filter housing ( 23 ), the coupling assembly ( 200 ) comprising a connecting part for connecting the core element ( 38 ) to the coupling assembly ( 200 ).

1 - 18 . (canceled) 
     
     
         19 . A filter element, comprising:
 a tubular wall of filter medium;   a first end cap provided at one end of the tubular wall of filter medium; and   a second end cap provided at the other end of the tubular wall of filter medium opposite said one end;   wherein the second end cap comprises a circumferential groove for accommodating a seal member; and   wherein the circumferential groove has an inclination with respect to the longitudinal direction of the tubular wall.   
     
     
         20 . The filter element according to  claim 19 , wherein the circumferential groove extends in a plane which is inclined with respect to the longitudinal direction of the tubular wall. 
     
     
         21 . The filter element according to  claim 19 , wherein the second end cap further comprises a projection. 
     
     
         22 . The filter element according to  claim 21 , wherein the projection extends in radial direction of the tubular wall. 
     
     
         23 . The filter element according to  claim 19 , wherein the filter element further comprises a seal member is accommodated in the circumferential groove. 
     
     
         24 . The filter element according to  claim 23 , wherein the seal member is an O-ring. 
     
     
         25 . The filter element according to  claim 19 , wherein the first and second end cap are fixedly attached to the ends the tubular wall of filter medium. 
     
     
         26 . The filter element according to  claim 19 , wherein the second end cap comprises a U-shaped flange part opening in the direction of the tubular accommodating said other end of the tubular wall of filter medium between the legs of the U-shape. 
     
     
         27 . The filter element according to  claim 19 , wherein the second end cap further comprises a tubular portion open at its axial ends, and wherein the circumferential groove is provided in the tubular portion. 
     
     
         28 . The filter element according to  claim 27 , wherein the circumferential groove is provided on an outer surface of the tubular portion. 
     
     
         29 . The filter element according to  claim 27 , wherein the circumferential groove is provided on an inner surface of the tubular portion.