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This patent describes a sealing arrangement for the bearing on a clamping bolt such as may be used to support the bracket of an idler pulley for an engine belt system. A U-ring seal is used in a flange orientation facing radially outwards instead of an O-ring or to provide improved sealing against c
thc shaft by an inner race retainer screwed on the shaft near its inlet end. The bearings are sealed in a chamber betwecl3 tile shaf't and the body. Further sealing ofthe chamber is achievcd bv the ()-ring around th,z sieeve.
seal has a moulded wave profile, or a series of semicircular arches that contact the groove wall. A number of different patterns are illustrated.
A method and apparatus for installing casing hangers in a wellbore using an externally activated gripping system is described. The purpose is to provide an annulus seal that can also be released and the hanger position adjusted. It appears to comprise an annular bush which is compressed radially by