Patent ID: 6896621

Claim:
A torque limiting coupling for driving, or drives of, agricultural implements or machinery comprising: a longitudinal axis; a first coupling hub having a first outer face and first recesses starting from the first outer face; a first driving member per first recess, said first driving member being adjustably guided between a torque transmitting position, projecting beyond the first outer face of the first coupling hub, and a disconnected position, retracted back into said first outer face, and said first driving member, at its end, when in the torque transmitting position that projects from the first outer face, includes a torque transmitting face and, facing away, from said first torque transmitting face, a second torque transmitting face; at least one first spring per first driving member, said first spring loads said driving member for assuming the torque transmitting position and said first spring arranged in the first coupling hub; a second coupling hub having a second outer face with second recesses starting from the second outer face; a second driving member per second recess, said second driving member being adjustably guided in a second recess between a torque transmitting position, where said second driving member projecting beyond the second outer face, and a disconnected position, wherein said second driving member retracted into the second coupling hub, said second driving member, at its end projecting beyond the second outer face, including a third torque transmitting face and, facing away from said third torque transmitting face, a fourth torque transmitting face; at least one second spring per second driving member, said second spring loads the second driving member towards the torque transmitting position and said second spring received in the second coupling hub; one single coupling sleeve having a single bearing bore rotatably receiving both coupling hubs by their outer faces and said coupling hubs arranged along the longitudinal axis one behind the other, said single coupling sleeve in the single bearing bore having grooves distributed according to the first and second recesses of the two coupling hubs, said grooves extend parallel relative to the longitudinal axis across said single coupling sleeve and said grooves having a supporting face which is adapted to contact identically designed first and third torque transmitting faces of the first and second driving members and extending along the length of the groove and a side face of the groove positioned opposite the supporting face is adapted to contact identically designed second torque transmitting face of the first driving member and fourth torque transmitting face of the second driving member.