Patent ID: 8357049

Claim:
A torque-transfer assembly comprising: a shaft having an inner surface that defines a bore, the bore defining a shaft axis, wherein the shaft has a first, a second, a third, and a fourth fluid port in fluid communication with the bore, wherein the first fluid port is located a distance along the shaft axis from the second fluid port and the third fluid port is located a distance along the shaft axis from the fourth fluid port; and a fluid transfer tube having a longitudinal body that defines a tube axis located within the bore and coaxial with the shaft axis, the fluid transfer tube having an outer surface sealingly engaged with the inner surface of the shaft, wherein the outer surface includes a first indented fluid groove and a second indented fluid groove each parallel to the tube axis, wherein the first indented fluid groove is in fluid communication with the first fluid port and the second fluid port and the second indented fluid groove is in fluid communication with the third fluid port and the fourth fluid port, and wherein a depth and a width of the first indented fluid groove is different from a depth and a width of the second indented fluid groove.