Filterwerk Mann + Hummel Gmbh

Mann+hummel Gmbh

Stefan Kochert

Klaus Moessinger

Bernd Spaeth

Volker Greif

Thomas Carle

A filter element () having a supporting body () around which a filter medium () is wound. The filter medium () is a weldable material and is sealingly affixed to the supporting body () two radial weld seams () and/or a longitudinal weld seam (). The welding of the filter medium () onto the supporting body () eliminates the need to produce prefabricated tubes of filter medium, and enables the filter medium to be processed directly from a roll.

Filter element

A method of making an air filter insert for cleaning the combustion air of an internal combustion engine. The method includes producing the filter insert ( ) from a pleated filter medium ( ) which is formed into a hollow cylinder, in which at least one end plate ( ) made of thermoplastic elastomer or thermoplastic polyurethane is disposed on the axial end faces of the filter medium ( ). The at least one end plate ( ) is bonded to the cylindrical filter medium ( ) by heating the filter medium or the end plate ( ) with a high-temperature heating element and fusing the filter medium ( ) and the end plate ( ) to form a welded joint.

Air filter

A housing, in particular a pot-shaped filter housing. To connect housing pot,and cover,, a joint consisting of closure elements such as locking clamps or bow clamps,is proposed which can be attached at the periphery of the housing via receivers,. As there are more receivers,provided on the housing than locking clamps,which are required for absorbing retention forces, it is possible to vary the exact fitting position of the locking clamps according to the respective space available for receiving and mounting the housing. This is essential, because the rotating radius,of the tension levers,of the locking clamps has to be considered when mounting the locking clamps,. It is thus possible to provide housings for any field of use with variable receivers for the closure elements.

Housing

A mixing device is suggested for introducing a fluid into another flowing liquid, especially for use as an oil lubricator. This lubricator consists of an exterior venturi pipe 18 and an interior venturi pipe 16, whereby a feed line 13 ensures the supply of the oil to be mixed into the interior venturi pipe 16. The feed line 13 is connected to the storage tank 28 of the lubricator by means of a butterfly valve 30 and a uptake 29. A control insert 20 is mounted in the ring-shaped cross-section between the interior pipe 16 and the flow channel 18. This has elastic blades in particular, which largely close the circular ring section at lower amounts of throughput of the air, such that even in this operational state, consistently good mixing results of the oil with the air can be guaranteed in interior pipe 16.

Mixing device for changing a fluid into another flowing fluid

An indicating apparatus for indicating a vacuum, particularly for indicating the vacuum on the filtered-air side of an air filter for an internal-combustion engine, including a housing and a piston which is movably disposed in the housing and which separates a vacuum area from an anbient-pressure area. A snap element is provided which is activated by the piston and, at a predetermined vacuum, triggers an electric contact.

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Hockenheim, Germany

Stefan Kochert