Hydraulic vibration damper with non-buckling rebound buffer spring
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United States of America Patent
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Issued Date -
Aug 31, 2006
app pub date -
Feb 14, 2006
filing date -
Feb 25, 2005
priority date (Note) -
Abandoned
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Abstract
The invention relates to a hydraulic vibration damper with a cylindrical pipe (1), which is closed off by a sealing and guiding unit (6) and into which a piston rod (3), carrying a damper piston (2), which is passed through the sealing and guiding unit, can dip in an oscillating manner, the damper piston (2) dividing the interior space of the cylindrical pipe into an annular space (4) on the piston rod side and a working space (5) remote from the piston rod and a rebound buffer spring (7), constructed as a helical spring, which has a first end region (7a), facing the damper piston and a second end region (7b), facing the sealing and guiding unit (6), as well as a transition region (7c) connecting these to end regions, being disposed in the annular space (4) between the damper piston (2) and the sealing and guiding unit (6), characterized in that, within the transition region, the rebound buffer spring (7) has a section (7d), which extends in the axial direction over at least one helical spring coil and in which the internal diameter of the helical spring coils is smaller than the internal diameters of all other helical spring coils in the transition region (7c).
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