Low friction seal between relatively moving parts
 The invention provides a low friction gas seal between moving and stationary parts in the exhaust nozzle of a gas turbine engine. Such seal is in the form of a roller mounted on a pair of pivot arms to the movable member, which roller rides on the stationary part in sealing engagement therewith. The roller is preferably mounted behind a heat shield in rubbing (and sealing) engagement therewith. The roller has an outer tube of soft ceramic fabric for high temperature resistance and good sealing attributes. Such roller seal provides good sealing, e.g. between a convergent or divergent flap edge and the adjacent wall of an engine exhaust nozzle or between other moving and stationary parts. 
The United States of America as represented by the Secretary of the Air Force
F
F02K
inventional
James D.
Hill