Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh

Andreas Ochsenkuehn

Andreas Leinung

Stefan Schaebel

Guenther Reifinger

An air-dryer cartridge for a compressed air preparation system of a utility vehicle includes a drying agent container having a first housing part and a second housing part movable relative to each other, a cartridge housing for holding the drying agent container, and a helical spring is arranged to preload the second housing part in a direction to reduce a volume of the drying agent container. The helical spring has multiple coils, including a first outer coil at a first end of the helical spring and a second outer coil at a second end of the helical spring. At least one of the first and second outer coils has a greater diameter than inner coils of the helical spring between the first and the second end of the helical spring.

Air-dryer cartridge and helical spring for an air-dryer cartridge

An air dryer cartridge, in particular for a compressed air treatment system of a commercial vehicle, includes a cartridge housing having a closed housing cover, an inner housing arranged in the cartridge housing, a desiccant accommodated in a space between the cartridge housing and the inner housing, a filter arrangement arranged inside the cartridge housing and positioned in the compressed air stream upstream of the desiccant in relation to normal operation of the air dryer cartridge, and a bypass for bypassing the filter device. A non-return valve, which blocks a compressed air stream in the direction towards the desiccant and allows a compressed air stream in the direction away from the desiccant, is arranged in the bypass. The non-return valve is formed in one piece together with the inner housing.

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Munich, Germany

Andreas Ochsenkuehn