END REINFORCED VALVE STEM SEAL ASSEMBLY
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United States of America Patent
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Issued Date -
Jun 15, 2017
app pub date -
Dec 15, 2016
filing date -
Dec 15, 2015
priority date (Note) -
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Abstract
A valve stem seal assembly comprises an elastomeric seal having first and second radially inwardly directed sealing lips that are in intimate sealing contact with a valve stem. Also, a metal seal retainer has a first metal seal retainer portion disposed on a first top portion of the elastomeric seal. The metal seal retainer radially abuts a second top portion of the elastomeric seal and is bonded thereto, where no portion of the elastomeric seal is axially above the first metal seal retainer portion. A second metal seal retainer portion is continuous and unitary with, and perpendicular to the first metal seal retainer portion. An outer surface of the elastomeric seal is bonded to an inner surface of the second metal seal retainer portion, and no portion of the elastomeric seal is radially outward of the second metal seal retainer portion.
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