Water separating screen for a filter element in a liquid filter

Patent metadata

Field	Value
Publication number	US-12544696-B2
Application number	US-202218056335-A
Country	US
Kind code	B2
Filing date	Nov 17, 2022
Priority date	Aug 5, 2013
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

A water separating screen for a filter element in a liquid filter, the water separating screen including: a screen fabric having end faces; and a fabric carrier; a screen fabric arranged on the fabric carrier and encircling a longitudinal axis, the screen fabric having axial end faces, the longitudinal axis defining an axial direction; wherein the fabric carrier in an area between the end faces exclusively has longitudinal struts, which at least substantially extend in the direction of the longitudinal axis and which are elastic in a radial direction.

First claim

What is claimed is:

1 . A water separating screen for a filter element in a liquid filter, the water separating screen comprising:
a fabric carrier comprised of longitudinal struts arranged circumferentially spaced apart about a longitudinal axis defining a longitudinal direction; wherein the fabric carrier has:
a first carrier ring arranged at and connected to a first axial end of the longitudinal struts; and
a second carrier ring arranged at and connected to an opposite second axial end of the longitudinal struts;
wherein the first carrier ring and the second carrier ring are each arranged at respective axial end faces of the water separating screen;
wherein the longitudinal struts, the first carrier ring and the second carrier ring are integrally formed together;
wherein the longitudinal struts extend axially between the first carrier ring and the second carrier ring and are connected to the first carrier ring and the second carrier ring at the first axial end and at the opposite second axial end of the longitudinal struts, respectively;
wherein between the first carrier ring and the second carrier ring, the fabric carrier does not have cross struts connecting two or more of the longitudinal struts so that the longitudinal struts are free to deflect radially inwardly against a fluid pressure;
a screen fabric which is tubular and circumferentially surrounds the longitudinal struts of the fabric carrier, the screen fabric having:
a first axial end having a first axial end face, the first axial end face held onto the first carrier ring; and
an opposite second axial end having a second axial end face, the second axial end face held onto the second carrier ring;
wherein the screen fabric is held only to the first carrier ring and the second carrier rings, the screen fabric is arranged radially outwardly surrounding and is not held onto the longitudinal struts such that the longitudinal struts are able to deflect radially inwardly relative to the screen fabric and the screen fabric is free to slide across the longitudinal struts when the longitudinal struts deflect radially inwardly due to the fluid pressure.

2 . The water separating screen according to claim 1 , wherein
the longitudinal struts are four longitudinal struts which are circumferentially spaced apart on a circumference of the water separating screen.

3 . The water separating screen according to claim 1 , wherein
the water separating screen is cylindrically formed.

4 . The water separating screen according to claim 1 , wherein,
the water separating screen is conically formed.

5 . An annular filter element, comprising:
a filter medium circumferentially closed about an axis of the annular filter element and extending along the axis, the axis defining an axial direction; wherein the filter medium has a radially outer flow face and a radially inner flow face, the radially inner flow face surrounding an inner clean space of the annular filter element; wherein the annular filter element is through-flowable radially from a radial outside to a radial inside of the annular filter element; the water separating screen according to claim 1 disposed within the inner clean space of the annular filter element, the water separating screen formed separately from the annular filter element, the water separating screen disposed within the inner clean space of the annular filter element radially inwardly of the filler medium.

6 . The annular filter element according to claim 5 , wherein
a tubular center pipe is disposed within the inner clean space of the annular filter element; wherein the water separating screen is disposed within the tubular center pipe and the tubular center pipe is disposed around the water separating screen with the water separating screen disposed within the inner clean space of the annular filter element.

7 . The annular filter element according to claim 5 , wherein
a coalescing element is disposed radially inwardly relative to the filter medium and radially outwardly of the water separating screen within the inner clean space of the annular filter element.

8 . The annular filter element according to claim 5 , wherein
the annular filter element has an end plate arranged on an axial end face of the filter medium; wherein the water separating screen is connected to the end plate of the annular filler element.

Assignees

• Mann & Hummel Gmbh

Inventors

• Moreno Linares Andrés
• Neubauer Sebastian
• Neubauer Helen

Classifications

• B01D29/21

  with corrugated, folded or wound sheets · CPC title

• B01D17/045

  with coalescers · CPC title

• B01D2201/4084

  Snap or Seeger ring connecting means · CPC title

• B01D17/08

  Thickening liquid suspensions by filtration · CPC title

• B01D2201/0415

  Details of supporting structures · CPC title