Seal for shaft passing through crankcase comprises first sealing ring which is normally activated and second which is deactivated, but can be activated if seal produced by first is inadequate using handle which moves sleeve from under it

摘要

The seal for a shaft (1) passing through a crankcase (3) comprises a first sealing ring (4) which is normally activated and a second (5) which is normally deactivated. The second ring can be activated if the seal produced by the first is inadequate using a handle which moves a tubular sleeve from under it.