Sealing assembly for ball or rod mills and the like

A sealing assembly for use on a bolt projecting through a hole in a wall enclosing slurry or the like and comprising an annular seal formed of a deformable material and adapted to be inserted over a projecting end of the bolt into contact with an outer surface of the wall;

• said annular seal having a central opening bordered by a peripheral sealing edge, parallel inner and outer faces, and bevelled sealing edges extending from said inner and outer faces to a circumference of said seal;
• a first bead projecting beyond each of the inner and outer faces adjacent the peripheral sealing edge, a second bead projecting beyond each of the inner and outer faces adjacent the bevelled sealing edges, and a substantially non-deformable washer adapted to be fitted to the bolt end to bear against the annular seal, said washer having a flat inner face parallel to the outer face of the annular seal and an inclined sealing edge disposed at an included angle of substantially 135.degree. to said inner face, said annular seal being compressed against the outer surface of the wall and extruded radially towards the bolt by the inclined sealing edge in response to a clamping force applied when a nut is tightened on the bolt whereby the the peripheral sealing edge and portions of the first beads are wedged into slurrytype engagement with the threads of the bolt and additional sealing pressure is applied in the vicinity of the second beads.