Spar Aerospace Products Ltd.

Philip N Ibbotson

Henry J Taylor

A powered wrist joint consisting of a base having a pitch member mounted thereon for rotation about a pitch axis and a pitch drive mounted on the base for driving the pitch member about the pitch axis and a yaw shaft mounted on the pitch member on a yaw axis which is disposed at right angles to and intersects the pitch axis. A housing is mounted on the yaw shaft for rotation about the yaw axis. A yaw drive is mounted in the housing for driving the housing about the yaw axis and a roll shaft is mounted for rotation in the housing about the roll axis which is disposed at right angles to the pitch and yaw axes and intersects the pitch and yaw axes at their point of intersection thereby to provide a common center of pitch, yaw and roll gyration.

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Mississauga, Canada

Philip N Ibbotson