Filter cartridge

Patent metadata

Field	Value
Publication number	US-9931589-B2
Application number	US-201715601013-A
Country	US
Kind code	B2
Filing date	May 22, 2017
Priority date	May 16, 2005
Publication date	Apr 3, 2018
Grant date	Apr 3, 2018

Abstract

A filter cartridge for operatively engaging a spool valve manifold having an ejection cam and an insertion cam. The filter cartridge includes a filter element and inlet/outlet portion in fluid communication with the filter element.

First claim

What is claimed is:

1. A method comprising:
providing a filter cartridge;
the filter cartridge comprising a sump and an inlet/outlet portion extending from one end of the sump having an outside diameter that is smaller than an outside diameter of the sump, the inlet/outlet portion having a cartridge inlet port and a cartridge outlet port;
a first lug on the inlet/outlet portion protruding outwardly from a surface of the inlet/outlet portion in a radial direction perpendicular to a central axis of the filter cartridge;
a shoulder surface that is formed by the intersection of the sump and the inlet/outlet portion;
a filter disposed within the sump;
the first lug comprising a curved surface facing the shoulder surface and curving away from the shoulder surface such that a distance between the curved surface and the shoulder surface varies; and

inserting the inlet/outlet portion into a spool valve manifold;
the spool valve manifold having a valve housing and a valve body positioned within the valve housing, the valve body rotatable about a first axis and configured to receive the inlet/outlet portion in a direction perpendicular to the first axis.

2. The method of claim 1 wherein the curved surface comprises a half-moon shape.

3. The method of claim 1 wherein a minimum distance between the curved surface and the shoulder surface is located in a plane intersecting with the central axis and bisecting the first lug into two halves.

4. The method of claim 3 wherein a slope of the curved surface transitions from a positive slope to a negative slope at the minimum distance.

5. The method of claim 4 wherein the curved surface is symmetrical about the minimum distance.

6. The method of claim 1 comprising rotating the valve body about the first axis from a second rotational position to a first rotational position by moving the filter cartridge thereby allowing a fluid from a fluid supply to flow through the spool valve manifold and into the filter cartridge.

Assignees

• 3M Innovative Properties Co

Inventors

• Tubby Brian J
• Bassett Laurence W

Classifications

• C02F9/20

  Portable or detachable small-scale multistage treatment devices, e.g. point of use or laboratory water purification systems · CPC title

• B01D2201/4053

  using keys · CPC title

• B01D2201/4046

  Means for avoiding false mounting of different parts · CPC title

• Y10T137/86863

  Rotary valve unit · CPC title

• B01D27/08 Primary

  Construction of the casing · CPC title