发明名称 Sealing device having an annular space between sealing lips
摘要 The follow-up performance to the operation of a shaft is improved by forming an annular space between a rubber seal lip formed of a rubber-like elastic material and a resin seal lip so as to prevent the resin seal lip from interfering with the rubber seal lip. The follow-up performance to the shaft is further improved by increasing the flexibility of the resin seal lip by forming a plurality of annular grooves parallel to one another to the side surface of the annular gap side of the resin seal lip. A PTFE sheet is inserted as in the form of a flat washer shape into a mold, it is adhesively baked to a first seal member formed of rubber together with the vulcanization formation, a plurality of annular grooves and a helical groove are formed to the PTFE sheet by utilizing a mold clamping pressure, and the PTFE sheet is bent at the mold separation time after the molding process.
申请公布号 US6182975(B1) 申请公布日期 2001.02.06
申请号 US19950379599 申请日期 1995.03.07
申请人 NOK CORPORATION 发明人 MATSUSHIMA NOBORU;YAMANAKA SATOSHI
分类号 F16J15/32;(IPC1-7):F16J15/32 主分类号 F16J15/32
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