Mechanical seal having centering means

Abstract From the Canadian patent

The disclosed mechanical seal is for use between a housing and a rotatable shaft supported by the housing and has, adjacent annular primary and mating sealing rings each ring, having a generally radial sealing face. Means seals and holds the first sealing ring nonrotatably relative to the housing and, means seals and holds the second sealing ring to rotate with the shaft. One sealing ring is movable axially of the shaft and, springs urge this one ring toward the other sealing ring which, is axially fixed relative to the shaft. The axially moveable seal ring is centered coaxially with respect to the axis of the seal ring through engagement of a centering element which is centered relative to …