Filtering apparatus and filter element

Abstract

A filtering apparatus includes a pot-type filter housing (10), a filter element (28) accommodated in the housing, a holding mechanism (38) disposed in the filter housing (10) to removably fix the filter element along its longitudinal axis, and a sealing device (60) that seals between a lid (20) of the filter housing (10) and the filter element (28). The holding mechanism (38) is provided with cooperating holding elements embodied on the interior face of the filter housing (10) as well as on the filter element (28). The filtering apparatus dispenses with the need for O-seals that are known in prior art and extend in a radial direction between the filter element and the filter head as a housing lid because the sealing device (60) encompasses at least one sealing edge (62) or sealing surface placed parallel to the longitudinal axis in a radial direction and seals under the effect of the pressure applied it by the holding mechanism (38). The invention further relates to a filter element that is to be used in such filtering apparatus.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a filtering apparatus having a cup-like filter housing, a filter element held therein, and a holding means located in the filter housing for detachable fixing of the filter element along its longitudinal axis and having holding elements which interact with one another and which are formed on the inside of the filter housing and on the filter element. A sealing means effects sealing between the housing cover of the filter housing and the filter element. The present invention furthermore relates to a filter element designed for the filter device.BACKGROUND OF THE INVENTION[0002]Filter devices for holding filter elements are readily available commercially in a host of embodiments. A not insignificant portion of production costs in these filter devices is for making the holding means for detachable fixing of the filter element within the housing and for the sealing means for sealing the interior of the filter element relative ...

AI Technical Summary

Benefits of technology

The invention provides a filtering apparatus and filter element that have a reliable connection within the filter housing, are simple and easy to install, and can resist corrosive media. The sealing edge or surface ensures a good sealing action and operation over a long period of time. Conventional O-rings and rubber materials are not necessary, as the sealing means can be made from a variety of materials and can be used for any type of fluid being filtered. Even when the filter element is placed at an angle, the sealing means can still ensure long-lasting operation.

Problems solved by technology

The comparatively complex design of the known holding means leads to high production costs.

Also, the known solution is less easy to install, in that the filter element can slip unintentionally off the connecting branch or can tilt at this location when put in place.

This installation difficulty leads to an adverse effect on the sealing action of the sealing means.

This known sealing means with an O-ring is not suited for all fluid media, for example, not for all hydraulic liquids, poorly flammable liquids, corrosive media and for special biodegradable liquids.

Depending on the chemical structure of the respective medium, a long-lasting sealing function cannot be ensured.

In this respect, installation problems (slippage, tilting) can also arise when the filter element has to be pushed onto the support mandrel, for example, when the filter is being replaced on site, with the disadvantageous consequence that the sealing action of the sealing means is adversely affected.

Although, in addition the support mandrel as a component of the holding means in the longitudinal axial direction parallel to the longitudinal axis of the filter element on its lower base part in a receiving groove has another gasket which is not subject to any further mechanical stress, in any case, as described above the sealing action of the sealing means between the filter element and support mandrel as a housing part is adversely affected.

For example, no other components which are formed optionally as aftermarket elements could endanger the safe use of the filter device.

In this respect the above described disadvantages also apply to the known filter device according to that European patent.

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