Variable clearance positive pressure packing ring and...

Details Variable clearance positive pressure packing ring and... Variable clearance positive pressure packing ring and...

2008-06-10

2008-06-10

Look, Edward (Department: 3745)

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between runner portion and static part

Labyrinth seal

C277S413000

Reexamination Certificate

active

07384235

ABSTRACT:
A packing ring assembly is provided and includes an arcuate carrier ring segment having an aperture formed therethrough, an arcuate packing ring segment including an attachment component extending through the aperture of the carrier ring segment and movably associating with the carrier ring segment and the packing ring segment, and an actuator component disposed between the carrier ring segment and the packing ring segment and extending at least partially along the aperture. The actuator component is configured to maintain the packing ring segment in a first position relative to the carrier ring segment and to allow a movement of the packing ring segment to a second position relative to the carrier ring segment when the packing ring assembly is exposed to a pressure condition.

REFERENCES:
patent: 3529906 (1970-09-01), Borden et al.
patent: 5362072 (1994-11-01), Dalton
patent: 5374068 (1994-12-01), Jewett et al.
patent: 5709388 (1998-01-01), Skinner et al.
patent: 6572115 (2003-06-01), Sarshar et al.
patent: 6655696 (2003-12-01), Fang et al.
patent: 6840519 (2005-01-01), Dinc et al.
patent: 7229246 (2007-06-01), Ghasripoor et al.

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