Knorr-bremse Systeme Fuer Nutzfahrzeuge Gmbh

Knorr-bremse Systeme Fur Nutzfahrzeuge Gmbh

Jacques Lanquetot

Falk Hecker

Michael Herges

Gerhard Wieder

Alain Fantazi

Sylvain Derouault

Franck Hemery

Vincent Boehler

A service brake device for vehicles is provided which permits rapid venting of a service brake pressure chamber. The service brake device includes at least one pneumatic service brake device with at least one piston and/or a diaphragm. The piston and/or diaphragm delimits the service brake pressure chamber on one side which can be supplied with compressed air from a brake line for applying the service brake and can be purged of compressed air for releasing the service brake, delimits a spring chamber on the other side which receives a spring that prestresses the piston and/or the diaphragm in the release position of the service brake. The pressure chamber includes a pressure connection communicating with the brake line. A quick air release valve between the brake line and the pressure chamber is arranged to connect the brake line to the pressure chamber when the pressure in the brake chamber is greater than in the pressure chamber, and to connect the pressure chamber to the spring chamber when the pressure in the pressure chamber is greater than the brake line pressure.

Service brake device with quick air release valve

A combined service brake and spring brake cylinder for vehicle brake systems, includes a service brake piston and a spring brake piston. A sealing assembly is located in a central bore of a partition and seals off the interior of the service brake cylinder from the interior of the spring brake cylinder. The radial outer peripheral surface of the spring brake piston has an additional sealing assembly for sealing off a spring chamber. At least one of the sealing assemblies contains a guide ring that guides the spring brake piston rod in the bore of the partition, or the spring brake piston in the spring brake cylinder. The guide ring consists of a more rigid material than that of at least one sealing element. The sealing element consists of an elastomer that is connected to the guide ring by original forming methods such as injection molding or transfer molding.

Combined service brake and spring brake cylinder with sealing assemblies consisting of a guide ring and at least one sealing element

A spring-loaded brake cylinder for commercial vehicles includes at least one spring-loaded brake piston that can be actuated by a pre-loaded spring and is supported in a housing. A mechanical emergency release device is provided for the emergency release of the spring-loaded brake cylinder. The emergency release device includes an indicator that has an indicator rod indicating the position of the spring-loaded brake piston. The rod extends through a threaded spindle of the emergency release device and is movable in the axial direction. A stop body is disposed in the region of one end of the indicator rod. The stop body is positively connected to the indicator rod by a detent connection produced by an axial relative movement between the indicator rod and the stop body.

Spring-loaded brake cylinder having locked stop body

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Trouville/Mer, France

Jacques Lanquetot