Filter cartridge provided with means for expulsion of water and a relative filter group

Patent metadata

Field	Value
Publication number	US-9631590-B2
Application number	US-201314434329-A
Country	US
Kind code	B2
Filing date	Sep 24, 2013
Priority date	Oct 11, 2012
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

Abstract

A filter cartridge ( 30 ) for filtering fuel, comprising a filter wall ( 31 ) having a tubular shape, a first support plate ( 32 ) fixed to an end of the filter wall ( 31 ) and a second support plate ( 33 ) fixed to the opposite end of the filter wall, each support plate ( 32, 33 ) defining a respective portion ( 324,325;335,336 ) of a discharge conduit ( 324,325; 50; 335,336 ) of the water which separates from the fuel during filtration of the fuel; the peculiarity of the invention consists in the fact that it comprises a connecting cannula ( 50 ) able to connect the portions ( 324,325;335,336 ) and arranged externally of the filter wall ( 31 ).

First claim

The invention claimed is:

1. A filter cartridge ( 30 ) for filtering fuel, comprising:
a filter wall ( 31 ) having a tubular shape,
a first support plate ( 32 ) fixed to an end of the filter wall ( 31 ),
a second support plate ( 33 ) directly fixed to the opposite end of the filter wall ( 31 ),
a first conduit ( 324 , 325 ) realized in the first support plate ( 32 ) and a second conduit ( 335 , 336 ) realized in the second support plate ( 33 ) for discharging water which separates from the fuel during filtration of the fuel,
wherein the first conduit ( 324 , 325 ) comprises an inlet mouth ( 327 ) and an outlet mouth ( 326 ),
wherein the second conduit ( 335 , 336 ) comprises an inlet mouth ( 337 ) and an outlet mouth ( 338 ),

wherein the filter cartridge ( 30 ) further includes a connecting cannula ( 50 ) arranged externally of the filter wall ( 31 ) for connecting the first conduit ( 324 , 325 ) to the second conduit ( 335 , 336 ), and
wherein the connecting cannula ( 50 ) comprises a first end ( 51 ) sealingly inserted in the outlet mouth ( 338 ) of the second conduit ( 335 , 336 ) and a second end ( 52 ) sealingly inserted in the inlet mouth ( 327 ) of the first conduit ( 324 , 325 ).

2. The filter cartridge ( 30 ) of claim 1 , wherein
the first conduit ( 324 , 325 ) comprises a substantially axial section ( 324 ) parallel to a longitudinal axis (A) of the filter wall ( 31 ) and a lateral section ( 325 ) substantially perpendicular to the axis of the filter wall ( 31 );
wherein
the second conduit ( 335 , 336 ) comprises a substantially axial section ( 335 ) parallel to the longitudinal axis (A) of the filter wall ( 31 ) and a lateral section ( 326 ) substantially perpendicular to the axis of the filter wall ( 31 ),

and wherein
the connecting cannula ( 50 ) sets the lateral sections ( 325 ) of the first conduit ( 324 , 325 ) in communication with the lateral section ( 326 ) of the second conduit ( 335 , 336 ).

3. The filter cartridge ( 30 ) of claim 1 further comprising regulating means ( 53 ) of the length of the connecting cannula ( 50 ).

4. The filter cartridge ( 30 ) of claim 3 , wherein the regulating means comprise at least a bellows zone ( 53 ) of the connecting cannula ( 50 ).

5. The filter cartridge ( 50 ) of claim 2 , wherein
the first support plate ( 32 ) comprises a seal ( 322 ) axially interposed between the inlet mouth ( 327 ) and the outlet mouth ( 326 ) of the first conduit ( 324 , 325 ).

6. The filter cartridge ( 30 ) of claim 1 , further comprising at least a hydrophobic net ( 43 ) having a tubular shape and located coaxially internally of the filter wall ( 31 ).

7. The filter cartridge ( 30 ) of claim 1 , further comprising a support core ( 40 ) coaxially inserted internally of the filter wall ( 31 ) and provided with radial openings ( 41 ) for fuel passage, the support core ( 40 ) being provided with at least a rib ( 42 ) having a helical development deriving from an external mantle of the support core and able to internally graze the filter wall ( 31 ).

8. The filter cartridge ( 30 ) of claim 6 , wherein the hydrophobic net ( 43 ) is fixed to a support core ( 40 ) coaxially inserted internally of the filter wall ( 31 ) and provided with radial openings ( 41 ) for fuel passage in such a way as to intercept the fuel passing through the radial opening ( 41 ) thereof.

9. A filter group ( 10 ) comprising an external casing ( 20 ) provided with an inlet ( 23 ) for a fuel to be filtered, an outlet ( 24 ) for the filtered fuel, and an outlet conduit ( 25 ) of water collected on a bottom of the external casing, and a filter cartridge ( 30 ), according to claim 1 , configured to divide an internal volume of the casing ( 20 ) into a first environment (B) communicating with the inlet ( 23 ) and a second environment (C) communicating with the outlet ( 24 ), the first conduit ( 324 , 325 ) filter cartridge ( 30 ) being connected to the outlet conduit ( 25 ).

10. The filter group ( 10 ) of claim 9 , wherein the casing ( 20 ) comprises a body ( 21 ), substantially cup-shaped and superiorly closed by a lid ( 22 ), and the inlet ( 23 ), the outlet ( 24 ) and the outlet conduit ( 25 ) being realised at the lid ( 22 ).

11. The filter group ( 10 ) of claim 9 , wherein
the first support plate ( 32 ) of the filter cartridge ( 30 ) comprises a seal ( 322 ) axially interposed between the inlet mouth ( 327 ) and the outlet mouth ( 326 ) of the first conduit ( 324 , 325 ),
wherein

the second support plate ( 33 ) of the filter cartridge ( 30 ) comprises a seal ( 333 ) interposed between inlet mouth ( 337 ) and the outlet mouth ( 338 ) of the second conduit ( 335 , 336 ),
and wherein the seals ( 322 , 333 ) of the filter cartridge ( 30 ) cooperate with the casing ( 20 ) in separating the first environment (B) of the fluid to be filtered from the second environment (C) of the filtered fluid.

12. The filter cartridge ( 30 ) of claim 1 , wherein:
the first support plate ( 32 ) comprises an offset hollow shank ( 323 ),
wherein
an internal cavity of the hollow shank ( 323 ) defines the first conduit ( 324 , 325 )
wherein
the first conduit ( 324 , 325 ) opens, at an upper free end of the hollow shank ( 323 ), via the respective outlet mouth ( 326 ), and, at a lateral flank of the first support plate ( 32 ), via the respective inlet mouth ( 327 ), and wherein the second end ( 52 ) of the connecting cannula ( 50 ) is sealingly inserted in the inlet mouth ( 327 ) of the hollow shank ( 323 ).

13. The filter cartridge ( 30 ) of claim 1 , wherein:
the second support plate ( 33 ) comprises a hollow cannula ( 334 ) located in an offset position,
wherein
an internal cavity of the hollow cannula ( 334 ) defines the second conduit ( 335 , 336 )
wherein
the second conduit ( 335 , 336 ) opens, at a lower free end of the hollow cannula ( 334 ), via the respective inlet mouth ( 337 ) and, at a lateral flank of the second support plate ( 33 ), via the respective outlet mouth ( 338 ),
and wherein
the first end ( 51 ) of the connecting cannula ( 50 ) is sealingly inserted in the outlet mouth ( 338 ) of the hollow cannula ( 334 ).

14. The filter group ( 10 ) of claim 9 , wherein
the first support plate ( 32 ) comprises an offset hollow shank ( 323 ),
wherein
an internal cavity of the hollow shank ( 323 ) defines the first conduit ( 324 , 325 ),
wherein
the first conduit ( 324 , 325 ) opens, at an upper free end of the hollow shank ( 323 ), via the respective outlet mouth ( 326 ), and, at a lateral flank of the first support plate ( 32 ), via the respective inlet mouth ( 327 ),
wherein
the second end ( 52 ) of the connecting cannula ( 50 ) is sealingly inserted in the inlet mouth ( 327 ) of the hollow shank ( 323 )
and wherein
the upper free end of the hollow shank ( 323 ) is inserted, with the interposing of a seal ring, in a broadened section of the outlet conduit ( 25 ) of the external casing ( 20 ).

15. The filter group ( 10 ) of claim 10 , wherein
the the second support plate ( 33 ) comprises a hollow cannula ( 334 ) located in an offset position,
wherein
an internal cavity of the hollow cannula ( 334 ) defines the second conduit ( 335 , 336 ),
wherein
the second conduit ( 335 , 336 ) opens, at a lower free end of the hollow cannula ( 334 ), via the respective inlet mouth ( 337 ) and, at a lateral flank of the second support plate ( 33 ), via the respective outlet mouth ( 338 ),
wherein
the first end ( 51 ) of the connecting cannula ( 50 ) is sealingly inserted in the outlet mouth ( 338 ) of the hollow cannula ( 334 )

Assignees

• Ufi Filters Spa

Inventors

• Girondi Giorgio

Classifications

• B01D2201/342

  Axial sealings · CPC title

• B01D29/58

  arranged concentrically or coaxially · CPC title

• F02M37/221 Primary

  Mechanical Engineering · mapped topic

• B01D2201/295

  with projections extending in a radial outward direction, e.g. for use as a guide, spacing means · CPC title

• B01D2201/291

  End caps · CPC title