Hydac Filtertechnik Gmbh

Silke Kühnrich

Werner Wilkendorf

A filter device has a cup-shaped filter housing (), a filter element () in the housing and at least one end cap (). A retaining device detachably fixes the filter element () along its longitudinal axis and has screwing elements () interacting with each other and configured on the interior of the filter housing () and on the filter element (). A sealing device () forms the seal between the filter element () and a housing terminating part () limiting the filter housing () at an end. The housing terminating part () forms an element receiving device having a fluid passage () concentric to the longitudinal axis (). The fluid passage has inner screwing elements (). A connecting piece () of the end cap () is able to be screwed into the passage using outer screwing elements (). The sealing device has a sealing element () that is combined with the end cap () to form a cohesive component and that is accommodated in a seat () configured at the transition between the end cap () and the adjacent beginning of the thread turns () of the screwing elements () positioned at the connecting piece ().

Filter device and filter element

A ventilation device for fluid-storing reservoirs includes a connecting part () attachable to the opening of the reservoir to form an air- and/or fluid-conducting connection between the inside of the reservoir and the surroundings. This connection is effectively sealed by a labyrinth-like seal of a system of seal passages () from the penetration of media such as water and/or cleaning chemicals but is not sealed off from an exchange of air for ventilation. A filter element () is placed inside the connection. A portion of the seal passages () is formed on a ventilation chamber () releasably attachable to the connecting part () and having a seat () for the filter element provided as a filter leaf (). The filter leaf () forms a partition between two successive seal passages (and) adjacently extending approximately parallel to one another.

Growing community of inventors

Völklingen, Germany

Silke Kühnrich