Abstract: A device for effecting an elastic coupling is provided, comprising a first moving coupling element associable to a second movable coupling element, the first moving element transmitting rotational movement to the second movable element by compression of an elastic element, the coupling device defining a vent for the elastic element. Such an elastic coupling device thereby allows an increase in capacity of torque transmitted with respect to a similar coupling device lacking a vent, thereby maintaining the same useful life and reliability, and providing capital economy through utilization thereof.