Patent ID: 7004668

Claim:
A drive shaft connector assembly comprising a drive shaft connector adapted to receive a flexible drive shaft of a driven member for transmission of power in a rotary power tool, the connector comprising a connector body having an open first end and second end connected to a drive shaft with a longitudinal axis defined as running between said first end and said second end, the connector assembly comprising: a flexible drive shaft of a driven member in a rotary power tool; a drive shaft connected to the second end of the connector body; and the connector comprising: a drive area; and, an input area at the first end and adjacent said drive area guiding the flexible shaft of the driven member into the drive area, the input area consisting of four substantially similar sides, each side comprising a first point, a second point, a third point and a fourth point, wherein each side consists of a first planer surface defined by the first, second and fourth points and a second planer surface defined by the second, third and fourth points, said first and second surfaces converging at an apex bisecting each side such that said first and second planer surfaces are mirror images of each other, with the second and fourth points being positioned on said apex, wherein said apex slopes inward toward the drive area at a first angle with respect to the longitudinal axis, wherein the first angle is in the range from about 21° to about 34°, and wherein the first, second and third points define an outward edge of the open input area and form an obtuse angle, wherein the second angle is in the range from about 162° to about 174°.