Patent ID: 8025081

Claim:
A shaft assembly comprising: a shaft having an inner surface that defines a bore, the bore defining an axis, wherein the shaft has a first fluid port that communicates a fluid to the bore and a second fluid port that communicates the fluid from the bore, wherein the first fluid port is located a distance along the axis from the second fluid port; and a fluid transfer insert located within the bore and coaxial with the axis, the fluid transfer insert having an outer surface sealingly engaged with the inner surface of the shaft, the outer surface having a first end wall, a second end wall, and a pair of side walls that extend into the fluid transfer insert to define a fluid channel having a length at least greater than the distance between the first fluid port and the second fluid port, the fluid channel parallel to the axis and in communication with the first fluid port and the second fluid port; and wherein the fluid communicates from the first fluid port through the fluid channel to the second fluid port.