FLUORORESIN SEAL RING
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United States of America Patent
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Issued Date -
Jun 25, 2015
app pub date -
Jul 18, 2013
filing date -
Jul 25, 2012
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Abstract
A PTFE resin seal ring in which an amorphous carbon film is formed on at least one surface of an abutting part that forms a discontinuous part of the seal ring. Since an amorphous carbon film is formed on the abutting surfaces of the PTFE resin seal ring, sticking does not occur in the abutting part even after constant load is applied at a high temperature. Thus, the PTFE resin seal ring of the present invention exhibits excellent effects of ensuring sealing properties under pressure and slidability under ordinary pressure, and is effectively used as sealing material in, for example, rotation or reciprocation, including hydraulic circuits such as automatic transmissions (A/T) and continuously variable transmissions (CVT) for vehicles.
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