Abstract: Rotary joint apparatus for a prosthesis and the like having a first section 10 and a second section 16 joined by the joint is disclosed including a housing member A connected to one of the sections and a housing member B connected to the other of said sections. A shaft C rotatably connects the housing members. A roller bearing clutch assembly D rotatably connects the housing member B to shaft C and includes an outer bearing race 18 connected to housing member B having a plurality of circumferentially spaced tapered camming portions 32 forming generally wedge-shaped camming surfaces. A plurality of roller bearings 34 are positioned in the camming portions bearing against shaft C. The roller bearings have a first position in the camming portion in which the bearings are locked between a surface 32b of the camming portion and shaft C for locking and preventing rotation relative to the shaft in a first direction.