Patent ID: 7252598

Claim:
A device for coupling a first shaft to a second shaft, each said shaft having a coupling end to be coupled to said device, the coupling end of the first shaft being hollow with an inside diameter being greater than the outside diameter of the coupling end of the second shaft, said device comprising: a barrel and a reaction mass, each of generally circular cross section, said barrel being hollow and comprising an outside coupler formed by the exterior surface of an upper portion of said barrel, a reaction mass interface formed by the exterior surface of a lower portion of said barrel, a collar between said outside coupler and said reaction mass interface, and an inside coupler formed by the inside surface of said barrel, said inside coupler overlapping both said outside coupler and said reaction mass interface; said inside coupler being slightly larger in diameter than the outside diameter of the coupling end of said second shaft, such that said end of said second shaft is able to be inserted into said inside coupler and adhered thereto; said outside coupler being slightly smaller in diameter than the inside diameter of said coupling end of said first shaft such that said outside coupler is able to be inserted into said coupling end and adhered thereto; the diameter of said collar being larger than the diameters of said outside coupler and said reaction mass interface; said reaction mass comprising an upper portion and a lower portion, said upper portion having an inside diameter slightly larger than the outside diameter of said reaction mass interface, the length of said upper portion approximately corresponding to the length of said reaction mass interface, such that said upper portion of said reaction mass is able to be slid over said reaction mass interface and adhered thereto; said lower portion having an inside diameter slightly larger than the outside diameter of said coupling end of said second shaft.