Coupling for transmitting rotary motion between a pair of shafts, even when said shafts are off-centered

Claim 1

A coupling for connecting the ends of a pair of shafts, comprising: a hub non-rotatably connected to the end of each shaft, each hub facing the other hub at a facing end thereof, each hub having an outer surface with a plurality of circumferentially spaced axially extending slots distributed therein; a bell engaged over the slots and facing ends of the hubs and including an inner surface with a plurality of circumferentially spaced, axially extending slots corresponding in number and positioned to respective slots of said hubs to form a plurality of roller housings between said hubs and said bell, said bell comprising a pair of semi-bells connected to each other; a barrel-shaped rounded roller rotatably mounted in each housing for co-rotation of said hubs and the shaft ends, and for allowing some non-coaxial orientation between the shaft ends; an annular rim having a rounded outer surface connected to each hub adjacent the axial slot of each hub and engageable with the inner surface of said bell for permitting non-coaxial orientation between the shatf ends; and a pair of cage gaskets engaged between said bell and each respective hub for sealing a space containing said housings.