Patent ID: 8021235

Claim:
A shaft assembly for transmitting a torque, said shaft assembly comprising: a first shaft member extending along a longitudinal axis and defining an interior and further defining a first slot extending along and angled relative to said longitudinal axis; a second shaft member at least partially disposed within said interior of said first shaft member and telescopically moveable at a telescoping speed along said longitudinal axis relative to said first shaft member with said second shaft member defining a second slot extending along said longitudinal axis and angled relative to both said longitudinal axis and said first slot; a roller carrier disposed within said interior of said first shaft member between said first shaft member and said second shaft member and defining a carrier slot; and a pin extending through said first slot, said carrier slot and said second slot for interconnecting said first shaft member, said roller carrier and said second shaft member with said pin moveable within said first slot and said second slot in both a longitudinal direction along said longitudinal axis and a transverse direction transverse to said longitudinal axis in response to said telescopic movement of said second shaft member relative to said first shaft member to move said roller carrier relative to said first shaft member and said second shaft member at a carrier speed less than said telescoping speed, said pin including a base portion and a plunger portion at least partially disposed and moveable within said base portion.