Patent ID: 6254344
Filing Date: 2001-07-03
Classification: F16J

Abstract:
An annular seal comprising an annular backing back, and a mass of bristles packed together in a layer axially adjacent to said annular backing plate, the bristles and said backing plate in use being arranged to be mounted on and extend from a radially outer member towards and around a cylindrical inner member, the bristles having free ends which extend radially farther than the backing plate and which are arranged to operationally co-operate with the inner cylindrical member to form a seal thereagainst, said outer member and inner cylindrical member being arranged in use for relative rotational movement about the axis of the cylindrical inner member;wherein said seal further comprises an expansion ring disposed radially inwardly of the backing plate and mounted from the backing plate in substantially the same plane as the backing plate, and a suitable mounting means which mounts and attaches the expansion ring on and to the backing plate and which is arranged to permit radial movement of the expansion ring relative to the backing plate and the operational position of the inner cylindrical member, said mounting means comprising an annular spring with a substantially U shaped circumferential cross section.