Slide valve for a filter system and filter system with a slide valve

Patent metadata

Field	Value
Publication number	US-11644111-B2
Application number	US-202117142912-A
Country	US
Kind code	B2
Filing date	Jan 6, 2021
Priority date	Jan 8, 2020
Publication date	May 9, 2023
Grant date	May 9, 2023

Abstract

A filter system is provided with a housing provided with a cover. The housing has a raw liquid inlet, a clean liquid outlet, and a liquid drain. A filter element is provided that separates a raw side from a clean side. A slide valve with a valve rod and a sealing head is provided, wherein the sealing head is arranged such that the liquid drain of the housing is closable but openable. A coupling is arranged between the sealing head and the valve rod, providing an axial securing action of the valve rod at the sealing head and a radial securing action, separate from the axial securing action, of the valve rod at the sealing head. A slide valve for such a filter system as well as a sealing head and a valve rod for such a slide valve are provided.

First claim

What is claimed is:

1. A filter system comprising:
a housing comprising a cover, wherein the housing comprises a raw liquid inlet, a clean liquid outlet, and a liquid drain;
a filter element arranged in an interior of the housing and separating a raw side from a clean side;
a slide valve arranged in the interior of the housing, the slide valve comprising:
a valve rod which is axially elongated and having an upper axial end and a lower axial end, the elongated valve rod adapted to extend through an interior of the filter element, the valve rod comprising:
a coupling collar or disk projecting radially outward from the valve rod;

a sealing head exchangeably fastened to the valve rod such that the liquid drain of the housing is closable by the sealing head but so as to be openable;
wherein the sealing head is exchangeably fastened to the valve rod for removal from the valve rod and replacement with a new sealing head upon exchange of the filter element, the exchangeable fastening thereby reducing waste by reusing remaining components of the slide valve, the sealing head comprising:
a receptacle embodied as a pocket sized to detachably receive and engage the coupling collar or disk, exchangeably fastening the sealing head to the valve rod;
wherein the receptacle has an insertion opening formed in a radially outer wall of the sealing head, the insertion opening sized to receive the coupling collar or disk of the valve rod into the receptacle of the sealing head;
wherein when the coupling collar or disk is received into the receptacle, an engagement lip of the receptacle engages against and covers at least a part of a rim of the coupling collar or disk, axially securing the coupling collar or disk in the receptacle, thereby exchangeably fastening the sealing head onto the valve rod.

2. The filter system according to claim 1 , wherein the valve rod is fastened to the cover of the housing.

3. The filter system according to claim 1 , wherein the sealing head is configured to be removed with the valve rod from the housing without being destroyed.

4. The filter system according to claim 1 , wherein the sealing head comprises two sealing elements that are axially spaced apart from each other.

5. The filter system according to claim 1 , wherein
the receptacle embodied as a pocket is formed in an interior of the sealing head.

6. The filter system according to claim 1 , wherein
the coupling collar or disk is secured on the lower axial end of the valve rod and projecting radially outward from the valve rod.

7. The filter system according to claim 1 , wherein
the sealing head is exchangeably fastened to the valve rod at the lower axial end of the valve rod.

8. The filter system according to claim 1 , further comprising:
a clamping element arranged on an axially outer side of the receptacle of the sealing head, the clamping element sized and configured to circumferentially engage about and clamp the valve rod into the clamping element, thereby radially fastening the sealing head exchangeably onto the valve rod,
wherein the clamping element is axially spaced away from the insertion opening and receptacle of the sealing head.

9. The filter system according to claim 8 , wherein
the clamping element is a C-shaped clamping element circumferentially engaging about the valve rod.

Assignees

• Mann & Hummel Gmbh

Inventors

• Jainek Herbert

Classifications

• B01D2201/342

  Axial sealings · CPC title

• F01M11/03

  Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means (filters B01D) · CPC title

• B01D35/153

  Anti-leakage or anti-return valves · CPC title

• B01D35/30

  Filter housing constructions · CPC title

• B01D29/114

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