Patent ID: 7174794
Filing Date: 2007-02-13
Classification: B62D,F16D,G01D

Abstract:
1. A coupling comprising: a first separate coupling member; a second separate coupling member; a third separate coupling member being located in between said first coupling member and said second coupling member; said third coupling member having formed thereon a first pair of connecting elements diametrically opposed to one another and defining a first axis, and further having formed thereon a second pair of connecting elements diametrically opposed to one another and defining a second axis that is substantially perpendicular to said first axis; said first coupling member having formed thereon a third pair of connecting elements configured to conform to said first pair of connecting elements of the third coupling member; said second coupling member having formed thereon a fourth pair of connecting elements configured to conform to said second pair of connecting elements of the third coupling member; and wherein said first coupling member and said third coupling member rotate around said first axis, and said second coupling member and said third coupling member rotate around the second axis.