Patent ID: 7878911

Claim:
A fluid transfer tube for communicating fluid between a plurality of fluid ports in a torque-transfer assembly, the fluid transfer tube comprising: a cylindrical outer surface sealingly engaged with the torque-transfer assembly, the outer surface having a plurality of fluid grooves defined by a curved indented surface on the outer surface, wherein each of the plurality of fluid grooves is in fluid communication with a plurality of fluid ports in the torque-transfer assembly, and wherein a first of the plurality of fluid grooves has a depth and a width less than a depth and a width of each of the other of the plurality of fluid grooves; an inner surface that defines a central passage coaxial with the cylindrical outer surface; a first end that defines a first opening that communicates with the central passage; and a second end that defines a second opening that communicates with the central passage; and wherein fluid flow communicates from one of the plurality of fluid ports in the torque-transfer assembly, through one of the plurality of fluid grooves to another of the plurality of fluid ports in the torque-transfer assembly.