Hollow cylindrical filter element for a liquid filter

Patent metadata

Field	Value
Publication number	US-9511313-B2
Application number	US-201314031450-A
Country	US
Kind code	B2
Filing date	Sep 19, 2013
Priority date	Sep 21, 2012
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

A hollow cylindrical filter element for a liquid filter is flowed through in radial direction from an exterior of the filter element to an interior of the filter element by a fluid to be filtered. The fluid after filtration is drained from the interior of the filter element in an axial direction of the filter element. The filter element has a closure tube arranged in the interior of the filter element. The closure tube has a diameter that is smaller than a diameter of the interior of the filter element. The closure tube has a fluid-tight wall and the fluid after filtration is drained in the axial direction through the closure tube.

First claim

What is claimed is:

1. A hollow cylindrical filter element for a liquid filter, the filter element adapted to be flowed through in radial direction from an exterior of the filter element to an interior of the filter element by a fluid to be filtered, the filter element having a hollow interior extending from a lower axial end to an opposing upper axial end of the filter element, wherein the fluid after filtration is drained from the interior of the filter element in an axial direction of the filter element,
the filter element comprising:
a central tube arranged in the interior of the filter element, the central tube having:
a fluid-tight circumferentially closed lower wall portion of the central tube extending from the lower axial end of the filter element into the hollow interior towards the opposing upper axial end of the filter element ( 1 ), the fluid-tight closed wall lower axial portion terminating at an upper terminal edge of the fluid-tight closed wall lower axial portion; and
an upper axial portion of the central tube formed as a tubular grid having radial fluid flow radial openings extending through the tubular grid of the upper axial portion central tube, the upper axial portion of the central tube extending axially from the upper terminal edge towards the upper axial end of the filter element; and

a fluid-tight circumferentially closed wall closure tube arranged at the lower axial end of the filter element in a radial interior of the fluid-tight closed wall lower central tube terminating at an upper terminal edge of the closure tube within the interior of the filter element;
wherein the upper terminal edge of the closure tube forms a discharge opening for fluid to exit the interior of the filter element through the closure tube;
wherein the closure tube has a diameter that is smaller than a diameter of the interior of the filter element,
wherein the fluid after filtration is drained in the axial direction through the closure tube;

wherein the fluid-tight circumferentially closed lower wall portion of the central tube projects upwardly past the fluid-tight circumferentially closed wall closure tube, such that the upper terminal edge of the circumferentially closed lower wall portion of the central tube is arranged at least minimally above the upper terminal edge of the fluid tight circumferentially closed wall closure tube.

2. The filter element according to claim 1 , wherein
between an inner side of the central tube and an outer side of the closure tube an annular buffer space for the fluid is formed.

3. The filter element according to claim 2 , wherein
the closure tube is connected to the central tube.

4. The filter element according to claim 3 , wherein
the closure tube is locked with the central tube;
wherein the closure tube includes locking elements formed on the upper terminal edge of the closure tube, the locking elements projecting axially outwardly beyond the circumferentially closed wall closure tube;
wherein the locking elements have integrally formed locking hooks, the locking hooks lockably engaging the closure tube with the central tube.

5. The filter element according to claim 2 , wherein
the central tube has a fluid-tight wall extending across an axial partial length of the central tube.

6. The filter element according to claim 5 , wherein
an axial length of the fluid-tight wall of the closure tube and an axial length of the fluid-tight wall of the central tube are at least approximately identical.

7. The filter element according to claim 5 , wherein
the fluid-tight wall of the closure tube and the fluid-tight wall of the central tube extend at least across half an axial length of the filter element.

8. The filter element according to claim 1 , further comprising
an annular terminal disk arranged on an end face of the filter element,
wherein the closure tube is sealed relative to the terminal disk.

9. The filter element according to claim 8 , wherein
the terminal disk has a collar delimiting a central cutout of the terminal disk,
the filter element further comprising
a sealing ring arranged between a wall surface of the closure tube and the collar.

10. The filter element according to claim 9 , wherein
the sealing ring is inserted into a receiving groove that is provided in the wall surface of the closure tube.

11. A liquid filter comprising a hollow cylindrical filter element according to claim 1 .

Assignees

• Mann & Hummel Gmbh

Inventors

• Jokschas Guenter

Classifications

• B01D29/114 Primary

  arranged for inward flow filtration (B01D29/15, B01D29/33 take precedence) · CPC title

• B01D2201/316

  Standpipes · CPC title

• B01D35/005 Primary

  Filters specially adapted for use in internal-combustion engine lubrication or fuel systems · CPC title

• B01D29/13

  Supported filter elements · CPC title

• B01D29/21

  with corrugated, folded or wound sheets · CPC title