Patent ID: 7812263

Claim:
A combined environmental-electromagnetic rotary seal comprising: a first conductive cylindrical component whose interior is part of an electromagnetic energy transmission system; a conductive housing enclosing the first conductive cylindrical component in such a way that the first conductive cylindrical component lies at least partially inside the conductive housing and can rotate freely with respect to the conductive housing; an electromagnetic seal comprising a set of circumferential grooves cut into either the exterior of the first conductive cylindrical component or into the interior surface of the conductive housing, the grooves being located between the points at which the first conductive component enters and leaves the conductive housing; and an environmental seal comprising one or more grooves cut into either the exterior of the first conductive cylindrical component or the interior surface of the conductive housing, the grooves being located between points at which the first conductive component enters and leaves the conductive housing and a non-conductive seal such as an elastomeric o-ring.