Patent ID: 7473049

Claim:
A shaft assembly, comprising: a ceramic shaft comprising a ceramic material; a metallic shaft, one of the ceramic shaft or the metallic shaft having a generally conical portion near one end and the other of the shafts having a generally conical recess that at least partially receives the generally conical portion, the generally conical recess having a first portion that is received directly against a corresponding section of the generally conical portion, the generally conical recess having a second portion that is spaced in a radial direction a selected distance from a corresponding section of the generally conical portion, the second portion having a length extending in an axial direction that is more than twice as long as the selected distance; and a braze alloy in the second portion, the braze alloy directly contacting only the ceramic material of the ceramic shaft and the metal shaft for securing the ceramic shaft to the metallic shaft.