US Patent 8201800 Two ball mount with wiring passage

A rearview mirror assembly comprises a two-ball connector having at least one pivot ball thereon, a receiver having a plurality of fingers defining a ball receiving area, and a spring forming a circle. The spring is placed around the fingers of the receiver and the at least one pivot ball is placed into the ball receiving area of the receiver. The two-ball connector can be made of a high strength material and formed on a screw machine. The receiver does not experience a weight loss changing the torque force between −40° Celsius and 85° Celsius, thereby substantially maintaining the torque force at a substantially constant level between −40° Celsius and 85° Celsius.