Pneumatic retarding device
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United States of America Patent
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Jan 1, 2013
Grant Date -
Aug 20, 2009
app pub date -
Mar 26, 2009
filing date -
Aug 28, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention concerns a pneumatic retarding device with a cylinder dividing the cylinder into a displacement chamber and a compensation chamber and including a piston with a piston rod movably supported in the cylinder and having a piston seal element wherein, upon movement of the piston, a piston movement opposing force is generated while an air leakage flow is established past the piston for damping piston movement. The piston and the piston rod are formed integrally and the piston seal element has at least two deformation zones of which one responds faster to a pressure change in the displacement chamber then the other which is subjected to the pressure change via a restrictive passage. Also, a guide system is provided with such a retarding device.
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