Fuel Water Separator Filter

Patent metadata

Field	Value
Publication number	US-2016258397-A1
Application number	US-201615057526-A
Country	US
Kind code	A1
Filing date	Mar 1, 2016
Priority date	Mar 5, 2015
Publication date	Sep 8, 2016
Grant date	—

Abstract

A fuel water separator filter that is configured as a filter-in-filter construction with multiple water separating layers to separate water from the fuel. The fuel water separator filter is configured for use on a suction side of a fuel pump, and includes a neck with a radially outward facing seal that in use seals with the filter housing. The filter housing is formed with an isolated water sump that in use is isolated from water that is stripped from the fuel by the first stage of the outer filter.

First claim

What is claimed:

1 . A fuel water separator filter, comprising:
an outer filter with a bottom endplate; and an inner filter at least partially disposed within and secured to the outer filter, the outer filter and the inner filter combined providing a plurality of water separating layers, wherein the inner filter comprises:
a first sealing region configured to produce a seal between the inner filter and a filter housing, a second sealing region configured to produce a seal between the inner filter and a standpipe structure of the filter housing, and a third sealing region configured to produce a seal between the inner filter and an endplate of an outer filter.

2 . The fuel water separator filter of claim 1 , wherein the inner filter further comprises a snap-lock attachment configured to engage the outer filter.

3 . The fuel water separator filter of claim 1 , wherein the inner filter further comprises an anti-backoff portion configured to engage the outer filter and prevent the inner filter from disengaging the outer filter.

4 . The fuel water separator filter of claim 1 , wherein the inner filter further comprises openings configured to allow water removed from a fuel flow through the fuel water separator filter to drain to a water sump of the filter housing.

5 . A fuel water separator filter, comprising:
an outer filter; and an inner filter at least partially disposed within and secured to the outer filter, the outer filter and the inner filter combined providing a plurality of water separating layers, wherein the inner filter includes an endplate configured to seal an end of the outer filter.

6 . The fuel water separator filter of claim 5 , wherein the inner filter is formed integrally as a single unitary structure with the endplate.

7 . The fuel water separator filter of claim 5 , wherein the inner filter further comprises:
a first sealing region configured to produce a seal between the inner filter and a standpipe structure of a filter housing; and a second sealing region configured to produce a seal between the inner filter and the filter housing.

8 . The fuel water separator filter of claim 5 , wherein the inner filter further comprises openings configured to allow water removed from a fuel flow through the fuel water separator filter to drain to a water sump of a filter housing.

9 . A fuel water separator filter, comprising:
an outer filter; and an inner filter at least partially disposed within and secured to the outer filter, wherein:
the inner filter further comprises a frame structure, a snap-lock structure, and a top cover;
the outer filter and the inner filter combined provide a plurality of water separating layers; and
the snap-lock structure is configured to engage the outer filter.

10 . The fuel water separator filter of claim 9 , wherein the snap-lock structure and the frame structure are formed as separate components.

11 . The fuel water separator filter of claim 9 , wherein the snap-lock structure and the frame structure are integrally formed as single unitary structure.

12 . The fuel water separator filter of claim 9 , wherein the frame structure and the top cover are formed as separate components.

13 . The fuel water separator filter of claim 9 , wherein the snap-lock structure comprises a sealing region configured to produce a seal between the inner filter and a standpipe structure of a filter housing.

14 . The fuel water separator filter of claim 9 , wherein the snap-lock structure comprises snap-lock legs configured to engage a base portion.

15 . The fuel water separator filter of claim 14 , wherein the snap-lock legs form openings configured to allow water removed from a fuel flow through the fuel water separator filter to drain to a water sump of a filter housing.

16 . The fuel water separator filter of claim 14 , wherein the snap-lock legs are configured to self-center the inner filter in the outer filter.

17 . The fuel water separator filter of claim 14 , wherein the base portion is integrally formed as a single unitary structure with an endplate of the outer filter.

18 . The fuel water separator filter of claim 14 , wherein the base portion is formed as a separate piece that snap-lock engages with an endplate of the outer filter.

19 . The fuel water separator filter of claim 14 , wherein the base portion comprises a sealing region configured to produce a seal between the base portion and a filter housing.

20 . A fuel water separator system, comprising:
a filter housing comprising:
a standpipe structure, and
an isolated water sump; and
a fuel water separator filter disposed in the filter housing, the fuel water separator filter comprising:
an outer filter, and
an inner filter at least partially disposed within and secured to the outer filter, the outer filter and the inner filter combined providing a plurality of water separating layers,
wherein the inner filter comprises:
a first sealing region configured to produce a seal between the inner filter and the standpipe structure, and
openings configured to allow water separated from a fuel flow through the fuel water separator filter to flow to the isolated water sump.

21 . The fuel water separator system of claim 20 , further comprising a fuel pump in fluid communication with the fuel water separator filter, wherein the fuel water separator filter is disposed on a low pressure side of the fuel pump.

22 . The fuel water separator system of claim 20 , wherein the filter housing further comprises a wall configured to separate an interior space of the filter housing into the isolated water sump and a filter chamber configured to receive the fuel water separator filter.

23 . The fuel water separator system of claim 20 , wherein the inner filter further comprises:
a second sealing region configured to produce a seal between the inner filter and a portion of the filter housing other than the standpipe structure, and a third sealing region configured to produce a seal between the inner filter and the second endplate.

24 . The fuel water separator system of claim 20 , wherein the inner filter further comprises an endplate.

25 . The fuel water separator system of claim 20 , wherein the inner filter further comprises:
a frame structure, a snap-lock structure configured to engage the outer filter, and a top cover.

26 . A fuel water separator filter, comprising:
an outer filter; and an inner filter at least partially disposed within and secured to the outer filter, the outer filter and the inner filter combined providing a plurality of water separating layers, wherein the inner filter comprises means for securing the inner filter to the outer filter and means for producing a seal between the inner filter and a standpipe structure of a filter housing.

27 . The fuel water separator filter of claim 26 , further comprising:
means for preventing the inner filter from disengaging the outer filter.

28 . The fuel water separator filter of claim 26 , further comprising:
means for allowing water separated from a fuel flow through the fuel water separator filter to an isolated water sump of the filter housing.

Assignees

• Cummins Filtration Ip Inc

Inventors

• Jiang Zemin
• Wankhede Amit Shashikant
• Bisurkar Sonali Dattatraya
• Singh Jayant
• Rice Melvin
• Annamalai Manikandan

Classifications

• B01D2201/345

  Pressurized seals or gaskets · CPC title

• B01D2201/4084

  Snap or Seeger ring connecting means · CPC title

• B01D2201/30

  Filter housing constructions · CPC title

• B01D17/02 Primary

  Separation of non-miscible liquids · CPC title

• B01D2201/0415

  Details of supporting structures · CPC title