Dual seal rod guide assembly with low friction disc
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United States of America Patent
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Issued Date -
May 13, 2010
app pub date -
Nov 7, 2008
filing date -
Nov 7, 2008
priority date (Note) -
Abandoned
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Abstract
A dual seal rod guide assembly with low friction disc for use in a magneto-rheological (MR) strut is described. The dual seals separate the functions of abrasion resistance and temperature performance, with the primary seal formed of a material resistant to high temperatures and the buffer seal formed of a material resistant to the ferroelectric microparticles in the MR fluid. The porous rod guide, in conjunction with the buffer seal, allow only the MR carrier fluid to reach the bearing and primary seal. The MR carrier fluid provides internal lubrication of the bearing and primary seal. The retainer holds the assembly together and engages the rod guide flexible assembly to the housing with a low-friction disc therebetween. The disc reduces surface friction during radial movement of the rod guide.
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