Patent ID: 8235828

Claim:
A diaphragm coupling, comprising: first and second diaphragm plates joined together around their outer edges, each diaphragm plate having a central, axially-extending hub, the hub of the first diaphragm plate supporting within it a pin member having an outwardly projecting shoulder at each end adapted to engage an internal shoulder on the hub of the first diaphragm plate at one end and an internal shoulder on the hub of the second diaphragm plate at the other end so as to limit axial separation of the two hubs from one another, wherein the hub of one of the first diaphragm plate and the second diaphragm plate extends within the hub of the other of the first diaphragm plate and the second diaphragm plate to define therebetween an annular gap that permits angular displacement between the two hubs up to a predetermined angle and prevents angular displacement in excess of the predetermined angle.