Patent ID: 9517426
Filing Date: 2016-12-13
CPC Classification: B01D

Claim Text:
1. An oil filter, comprising: a head ( 10 ) having an oil inlet and an oil outlet ( 11 , 12 ); a cup( 20 ) having an open end ( 21 ) coupled to the head ( 10 ); a filtering element ( 30 ) internal to the cup ( 20 ) and defining an inner central chamber ( 32 ) and an outer annular chamber ( 33 ), each one being provided with an open end ( 32 b , 33 a ) connected to the oil inlet and the oil outlet ( 11 , 12 ), respectively; a top cap ( 50 ) having a central nozzle ( 51 ) connected to the open end ( 32 b ) of the inner central chamber ( 32 ), a median annular portion ( 52 )closing the adjacent end of the filtering element ( 30 ) and a peripheral portion ( 53 ) provided with windows and positioned on the open end ( 33 a ) of the outer annular chamber ( 33 ) and seated onto the open end ( 21 ) of the cup ( 20 ); at least one rotational locking means ( 60 ) and at least two axial locking means ( 80 ) which are incorporated to one of parts defined by the open end ( 21 ) of the cup ( 20 ) and by the peripheral portion ( 53 ) of the top cap ( 50 ); at least one rotational locking receiving means ( 70 ) and at least two axial locking receiving means ( 90 ), provided in the other of said parts ( 21 , 53 ) and in an interior of which are respectively fitted and retained the rotational locking means ( 60 ) and the axial locking means ( 70 ), upon seating of the peripheral portion ( 53 ) of the top cap ( 50 ) onto the open end ( 21 ) of the cup ( 20 ), characterized in that each axial locking means ( 80 ) is defined by a projection ( 81 ), in form of a rounded arrow axially projecting from the open end ( 21 ) of the cup ( 20 ), and two axial locking receiving means ( 90 ) are provided, each of them being defined by an axial recess ( 91 ), with a contour corresponding to that of the projection ( 81 ) and provided in a respective peripheral skirt segment ( 92 ), each being elastically deformable and incorporated to the top cap ( 50 ) and facing a respective axial projection ( 81 ).