Filtering device, filtering element and maintenance process of a filtering device

1. A filtering device ( 1 ), comprising:

a housing body ( 6 ) which encloses a cavity within the housing body, the housing body including

a filtered air outlet ( 8 );

a tubular filtering element ( 24 ) installed within the cavity and having

an open axial end ( 26 ) arranged at and in flow communication with the filtered air outlet ( 8 ); and

an axial end ( 27 ) closed by a cover ( 28 ); and

an intake cover ( 7 ) which closes the cavity opposite the filtered air outlet ( 8 );

wherein the cover ( 28 ) includes

at least a first tubular boss ( 55 ) projecting towards the intake cover ( 7 ); and

at least a second tubular boss ( 57 ) complementary to the first tubular boss ( 55 ) and projecting towards the cover ( 28 );

wherein the first tubular boss ( 55 ) being slotted in the second tubular boss ( 57 );

wherein the second tubular boss ( 57 ) includes

a bracket ( 58 ) arranged lying against the cover ( 28 ) such that the cover ( 28 ) and the intake cover ( 7 ) are held spaced apart from each other;

wherein the first tubular boss ( 55 ) has a cavity ( 68 ) arranged along an axis of the first tubular boss;

wherein the central bracket ( 58 ) includes an exhaust hole ( 69 ).

2. The filtering device ( 1 ) according to claim 1 ,

wherein the bracket ( 58 ) is a central bracket ( 58 ) arranged on the axis of the second cylindrical boss ( 57 );

wherein the central bracket central ( 58 ) is inserted into the cavity ( 68 ) of the first tubular boss.

3. The filtering device ( 1 ) according to claim 1 , wherein

the first tubular boss ( 55 ) presents a beveled end ( 56 ) on its edge.

4. The filtering device ( 1 ) according to claim 3 , wherein

the beveled end ( 56 ) is compressed at the bottom of the second tubular boss ( 57 ).

5. The filtering device ( 1 ) according to claim 4 , wherein

a distance between the cover ( 28 ) and the beveled end ( 56 ) is greater than a second distance between the bracket ( 58 ) and the bottom of the second tubular boss ( 57 ).

6. The filtering device ( 1 ) according to claim 1 , wherein

the first tubular boss ( 55 ) and the second tubular boss ( 57 ) are round in section.

7. The filtering device ( 1 ) according to claim 1 , wherein

the cover ( 28 ) includes two first tubular bosses ( 55 ); and

the intake cover ( 7 ) includes two second tubular bosses ( 57 ).

8. A filtering device ( 1 ), comprising:

a housing body ( 6 ) which encloses a cavity within the housing body, the housing body including

a filtered air outlet ( 8 );

a tubular filtering element ( 24 ) installed within the cavity and having

an open axial end ( 26 ) arranged at and in flow communication with the filtered air outlet ( 8 ); and

an axial end ( 27 ) closed by a cover ( 28 ); and

an intake cover ( 7 ) which closes the cavity opposite the filtered air outlet ( 8 );

wherein the cover ( 28 ) includes

at least a first tubular boss ( 55 ) projecting towards the intake cover ( 7 ); and

at least a second tubular boss ( 57 ) complementary to the first tubular boss ( 55 ) and projecting towards the cover ( 28 );

wherein the first tubular boss ( 55 ) being slotted in the second tubular boss ( 57 );

wherein the intake cover ( 7 ) includes a cyclone pre-cleaner.

9. A tubular filtering element ( 24 ) having

an axis extending through an interior of the filter element;

an open axial end ( 26 ) opening into the interior;

an opposite axial end ( 27 ) closed by a cover ( 28 );

wherein the cover ( 28 ) includes

at least a first tubular boss ( 55 ) projecting perpendicularly to the cover ( 28 );

slide members ( 73 ) arranged on opposite circumferential edges of the cover ( 28 ), the slide members ( 73 ) projecting radially outwards away from a circumferential outer edges of the cover ( 28 ), wherein each slide member ( 73 ) comprises:

a first rounded bulge projection ( 73 A), formed on a first end of the slide member ( 73 ) and projecting radially outwardly away from the circumferential outer edges of the cover ( 28 );

a second rounded bulge projection, formed on an opposite second end of the slide member ( 73 ) and projecting radially outwardly away from the circumferential outer edges of the cover ( 28 ); and

an indented depression ( 73 C) formed in the slide member ( 73 ) between the first rounded bulge projection ( 73 A) and the second rounded bulge projection ( 73 B), the indented depression ( 73 C) configured to receive and slide on a rail ( 74 ) provided on an interior side of a housing body ( 6 ) that is adapted to receive the tubular filtering element ( 24 ).

10. The tubular filtering element ( 24 ) according to claim 9 , wherein

the tubular boss ( 55 ) has a cavity ( 68 ) extending on an axis of the tubular boss.

11. The tubular filtering element ( 24 ) according to claim 10 , wherein

the first tubular boss ( 55 ) presents a beveled end ( 56 ) on its edge.

12. The tubular filtering element ( 24 ) according to claim 9 , wherein

the tubular filter element includes two of the said first tubular bosses ( 55 ).

13. The tubular filtering element ( 24 ) according to claim 9 , wherein

the cover ( 28 ) includes two slides ( 73 ).

14. A method of maintaining a filtering device ( 1 ), comprising

a housing body ( 6 ) which encloses a cavity within the housing body, the housing body including

a filtered air outlet ( 8 );

a tubular filtering element ( 24 ) installed within the cavity and having

an open axial end ( 26 ) arranged at and in flow communication with the filtered air outlet ( 8 ); and

an axial end ( 27 ) closed by a cover ( 28 ); and

an intake cover ( 7 ) which closes the cavity opposite the filtered air outlet ( 8 );

wherein the cover ( 28 ) includes

at least a first tubular boss ( 55 ) projecting towards the intake cover ( 7 ); and

at least a second tubular boss ( 57 ) complementary to the first tubular boss ( 55 ) and projecting towards the cover ( 28 );

wherein the first tubular boss ( 55 ) being slotted in the second tubular boss ( 57 );

wherein the second tubular boss ( 57 ) includes

a bracket ( 58 ) arranged lying against the cover ( 28 ) such that the cover ( 28 ) and the intake cover ( 7 ) are held spaced apart from each other;

wherein the first tubular boss ( 55 ) has a cavity ( 68 ) arranged along an axis of the first tubular boss; and

wherein the central bracket ( 58 ) includes an exhaust hole ( 69 );

wherein the method comprises the steps:

opening the intake cover ( 7 );

withdrawing the tubular filtering element ( 24 ) from the housing body;

inserting a new tubular filter element into the cavity inside the housing body ( 6 );

closing the intake cover ( 7 ) so that the first tubular boss ( 55 ) of the cover ( 28 ) is slotted into the second tubular boss ( 57 ) of the intake cover ( 7 ) with the bracket ( 58 ) arranged lying against the cover ( 28 ) such that the cover ( 28 ) and the intake cover ( 7 ) are held spaced apart from each other.