Piston seal and disc brake using the piston seal
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United States of America Patent
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app pub date -
Jul 9, 2007
filing date -
Apr 16, 2003
priority date (Note) -
Abandoned
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Abstract
A piston seal of a disc brake can stabilize the amount of rollback of a piston by reducing thermal expansion and a decrease in modulus of elasticity of the piston seal caused by an increase in temperature, thereby preventing a driver from feeling that the brake operation is unnatural. The piston seal is formed of a rubber composition in which at least 100 parts by weight or more of carbon black is added to 100 parts by weight of ethylene propylene rubber.
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