Segmented seal with hydrodynamic feature and assembly

Details Segmented seal with hydrodynamic feature and assembly Segmented seal with hydrodynamic feature and assembly

2011-03-29

2011-03-29

Stephenson, Daniel P (Department: 3676)

Seal for a joint or juncture

Seal between relatively movable parts

Circumferential contact seal for other than piston

C277S543000

Reexamination Certificate

active

07914007

ABSTRACT:
A segment of a seal assembly for sealing a higher pressure area against a rotating member is disclosed. The segment may include a radial external surface, a radial internal surface for sealing against a rotating member, a feed cavity, a ramp portion in communication with the feed cavity, a segment trough in communication with the ramp portion, one or more hydrodynamically-configured pads including an entrance; and a sealing dam disposed between the lift pad and the radial internal surface. The ramp portion may be configured to pick up air flow with an increase in velocity from the rotating member, and the trough or a flow-control portion may be configured to prevent fluid from flowing around or circumventing the pad entrance to, at least in part, provide a dynamic feed.

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European Patent Office, International Search Report and Written Opinion issued in counterpart PCT Application No. PCT/IB2009/007875, mailed May 17, 2010.

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