Patent ID: 7559845

Claim:
A disc pack coupling for transmitting torque between two shafts approximately aligned on a shaft axis, said coupling comprising: a first hub assembly including a first end adapter adjacent to a first hub flange; a center member having first and second opposing ends, said first end being fixed to said first end adapter; and a first disc pack encircling said center member and resiliently coupling said first end adapter and said first hub flange, wherein one of said hub flange and said end adapter is sandwiched between said first disc pack and the other of said hub flange and said end adapter; wherein one of said first end adapter and said first hub flange is received in a cavity formed in the other of said first end adapter and said first hub flange; wherein said one of said first end adapter and said first hub flange received in said cavity includes a non-circular perimeter engageable with said cavity to maintain torque transmission upon failure of said first disc pack.