Air Products and Chemicals, Inc.

Gregory Peter Hupp

David Jonathan Chalk

Lance Michael Grimm

Douglas R Williams

An annular seal assembly for use in a fluid mover, such as a compressor, having a tangentially-cut ring assembly and a radially-cut ring assembly, each ring assembly having arcuate segments, where each arcuate segment of the tangentially-cut ring assembly has a plurality of passages extending from the outer peripheral face to within at least 1.0 mm of the inner peripheral face, wherein after wearing in of the seal, the passages extend through the tangentially-cut ring assembly for pressure balancing.

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Allentown, PA, United States of America

Gregory Peter Hupp