Sealing and guiding unit for piston, has guide bush for guiding piston, and pretensioning unit arranged outside internal sealing region of sealing unit and bearing radially directed force on internal sealing region

摘要

The unit has a guide bush (3) for guiding a piston (6), where the guide bush at an end has a radially outwardly projecting region. A sealing unit (4) is fixed at the guide bush at the radially outwardly projecting region. A pretensioning unit (5) is arranged radially outside a radially internal sealing region of the sealing unit, and bears a radially inwardly directed pretensioning force on the internal sealing region. A radially outer sealing region is arranged at the sealing unit and at the pretensioning unit, where the sealing unit has a pressure release groove.