| 摘要 |
A combined seal, bearing and wiper/scraper ring for sealing the space (14) between a housing (12) and a reciprocating shaft (10) passing through the housing, comprises a single ring (30) having a body including a bearing portion (32) having a cylindrical bearing surface (34) adapted to engage the shaft in a sliding fit, a sealing portion (56) adapted to sealingly engage the shaft (10), and a wiper/scraper portion including an axially and radially inwardly extending lip (40) adapted to engage the shaft (10), the ring further including a surface or lip adapted to sealingly engage the housing (12), and retaining means for retaining the ring in position relative to the housing. The retaining means is preferably a flange (48), which may also provide the surface (50) which sealingly engages the housing (12). The ring is preferably formed in one piece, but alternative embodiments are described in which the sealing portion and the retaining flange are formed separately. |
