Fuel pre-filtering element

Patent metadata

Field	Value
Publication number	US-2019262746-A1
Application number	US-201916286115-A
Country	US
Kind code	A1
Filing date	Feb 26, 2019
Priority date	Feb 27, 2018
Publication date	Aug 29, 2019
Grant date	—

Abstract

A fuel pre-filtering element may comprise a casing provided with a fuel outlet, an internal tube, an upper annular element, a lower annular element, a filtering element and a cover. The filtering element may be arranged around the internal tube The upper and lower annular elements may be respectively fixed to the upper and lower ends of the filtering element The filtering element may be arranged inside the casing such that the internal tube establishes a contact with the fuel outlet, the upper annular element is arranged around the fuel outlet and in contact with an upper surface of the casing, and the upper annular element is deformed and forms an annular projection. The annular projection may establish a seal between the internal tube, the fuel outlet and the casing. The arrangement of the filtering element may be inside the casing and further form a region of unfiltered fuel.

First claim

1 . A fuel pre-filtering element, comprising:
a casing provided with a fuel outlet; an internal tube; an upper annular element; a lower annular element; a filtering element; and a cover, wherein the fuel prefiltering element is arranged around the internal tube, the upper and lower annular elements being fixed respectively to the upper and lower ends of the filtering element, the filtering element being arranged inside the casing such that i) the internal tube establishes a contact with the fuel outlet, ii) the upper annular element is arranged around the fuel outlet and in contact with an upper surface of the casing, and iii) the upper annular element is deformed and forms an annular projection, the annular projection establishing a seal between the internal tube, the fuel outlet and the casing, the arrangement of the filtering element inside the casing further forming a region of unfiltered fuel, the region of unfiltered fuel being the space formed between internal walls of the casing and external walls of the filtering element, and the cover being pressed against the lower annular element and being fixed to a lower surface of the casing.

2 . The fuel pre-filtering element according to claim 1 , wherein the upper and lower annular elements are made from a synthetic fabric of the fleece type and the casing, the internal tube and the cover are made from polyamide.

3 . The fuel pre-filtering element according to claim 1 , wherein the lower annular element is provided with tabs.

4 . The fuel pre-filtering element according to claim 1 , wherein the cover is transparent.

5 . The fuel pre-filtering element according to claim 1 , wherein the cover has a screw thread.

6 . A system of fuel pre-filtering, comprising:
a casing with a fuel outlet; an internal tube; an upper annular element; a lower annular element; and a filtering element, wherein the filtering element is arranged around the internal tube, the upper and lower annular elements being fixed respectively to the upper and lower ends of the filtering element, and the filtering element being arranged inside the casing such that the internal tube establishes a contact with the fuel outlet.

7 . The system of claim 6 , wherein the upper annular element is configured to be arranged around the fuel outlet and in contact with an upper surface of the casing.

8 . The system of claim 6 , wherein the upper annular element is deformed and forms an annular projection.

9 . The system of claim 6 , wherein the annular projection is configured to establish a seal between the internal tube, the fuel outlet and the casing.

10 . The system of claim 6 , wherein the filtering element is inside the casing and is configured to form a region of unfiltered fuel.

11 . The system of claim 10 , wherein the region of unfiltered fuel is a space formed between internal walls of the casing and external walls of the filtering element.

12 . The system of claim 6 , wherein the cover is configured to be pressed against the lower annular element and fixed to a lower surface of the casing.

13 . The system of claim 6 , further comprising a cover, wherein the upper and lower annular elements include a synthetic fabric of the fleece type, and the casing, the internal tube and the cover include polyamide.

14 . The system of claim 6 , wherein the lower annular element includes tabs.

15 . The system of claim 6 , further comprising a cover that is transparent.

16 . The system of claim 6 , further comprising a cover that includes a screw thread.

17 . A fuel pre-filtering device, comprising:
a casing with a fuel outlet; an internal tube; an upper annular element; a lower annular element; and a filtering element, wherein the filtering element is arranged around the internal tube, the upper and lower annular elements being fixed respectively to the upper and lower ends of the filtering element, the filtering element being arranged inside the casing such that the internal tube establishes a contact with the fuel outlet.

18 . The device of claim 17 , further comprising a casing with a fuel outlet, wherein the internal tube establishes contact with the fuel outlet.

19 . The device of claim 18 , wherein the upper annular element is arranged around the fuel outlet and in contact with an upper surface of the casing.

20 . The device of claim 17 , wherein the upper annular element is deformed and forms an annular projection.

Assignees

• Mahle Metal Leve Sa
• Mahle Int Gmbh

Inventors

• Yoshino Fernando Jun
• Ferrari Felipe
• Fritz Luiz Carlos
• Domingues Tadeu Geraldo

Classifications

• B01D27/08 Primary

  Construction of the casing · CPC title

• B01D2201/295

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

• B01D36/003

  Filters in combination with devices for the removal of liquids (B01D35/185 takes precedence) · CPC title

• B01D27/148

  arranged concentrically or coaxially · CPC title

• B01D2201/309

  Housings with transparent parts · CPC title