Mannesmann Sachs Ag

Zf Friedrichshafen Ag

Frankische Industrial Pipes Gmbh & Co. Kg

Dieter Gebauer

Boleslaw Tulaczko

Volker Stampf

Wolfgang Grosspietsch

Klaus Krappmann

Georg Zink

Andr&eacute; Gemeinhardt

Angelika Ebert

Thomas Riess

Olaf Pagels

Sven Ludsteck

Sören Schröter

Hai Sui

Martin Otto

André Gemeinhardt

Thomas Rieß

Ralf Koberstein

Markus Frank

Roland Morber

Holger Wegner-Braun

Manfred Krauß

Matthias Conrad

A hydraulic cylinder includes a housing having a fluid connection for connecting to a hydraulic system and an after-running connection for connecting to a fluid after-running vessel, and a piston which is axially displaceable in the housing to define a variable pressure space having a gas collecting portion, the piston being fixed against rotation in the housing and having at least one after-running groove which is oriented substantially toward the gas collecting portion. A primary seal arranged in the housing and receiving the piston therethrough is bridged by the after-running groove when the piston is in an extended end position, whereby the gas collecting portion of the pressure space communicates with the after-running connection when the piston is in the extended end position.

Hydraulic cylinder

A release arrangement for a hydraulically actuated clutch in a motor vehicle has an energy accumulator connected with a hydraulic system. The energy accumulator is connected with a pedal via a kinematic arrangement which adapts the pedal forces to the pedal path. It is possible to adapt the boosting force characteristic to the required pedal force curve in a very precise manner. This leads to a boosting force that possibly increases the depressing force, but primarily increases the force in the boosting area following the dead center of the kinematic arrangement. The characteristic of the boosting force curve over the pedal path can be adapted to the respective operating system in the motor vehicle without major structural alterations.

Clutch release arrangement

In a master/slave cylinder system for clutches or brakes, primary seals have bevels which interact with similar bevels of formations on housings of the respective cylinders. Along with the lowest possible friction in the region of the sealing lips, this permits carrying out uncomplicated pressure/negative-pressure filling in the case of the master cylinder. The primary seals slide by the wedge of effects in the direction of the pressure on the bevels of the annular formations and reduce the annular bearing face of the sealing lip in a frictionally optimized manner.

Primary seals for master-slave cylinder systems

In a cylinder for a hydraulic system, a seal has a sealing bead clamped between a housing of the cylinder and a supporting part which holds the sealing bead in a deformed state by pretensioning. The seal is reliably held in its intended position by the supporting part and, therefore, pressure fluctuations in the pressure space do not cause a relative movement of the seal and wear of the sealing bead.

Cylinder for a hydraulic system

An elastomeric seal seals a pipe which is held in a push-in part of a plug-in coupling relative to a cylindrical interior surface of a housing of the plug-in coupling, into which the push-in part is pushed together with the pipe. The seal is in prestressed contact with the interior surface of the housing via an outward-facing annular lip and with the pipe via a radially inward-facing annular lip. The elastomeric seal is connectable by positive fitting to the push-in part, this positive fit being lockable by the assembly of the pipe to form a non-releasable connection, the pipe having a cylindrical and uninterrupted exterior circumference in the region of the seal. The joint between the seal and the push-in part is simple to assemble and is lockable by the insertion of the pipe. The connection of the seal to the push-in part may be additionally secured, with certain changes of diameter, by compression of the web-shaped connection between them.

Seal for a plug-in connection

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Geldersheim, Germany

Dieter Gebauer