Rotary kinetic fluid motors or pumps – Bearing – seal – or liner between runner portion and static part – Resilient – flexible – or resiliently biased
Reexamination Certificate
2007-04-10
2007-04-10
Nguyen, Ninh H. (Department: 3745)
Rotary kinetic fluid motors or pumps
Bearing, seal, or liner between runner portion and static part
Resilient, flexible, or resiliently biased
C415S230000
Reexamination Certificate
active
11134596
ABSTRACT:
A swashplate seal assembly sized for rotor shaft rotation therein, including an outer cover encircling the rotor shaft and covering a sealing ring having an inner circumference on which a resilient sealing wiper is inwardly disposed. The outer cover, sealing ring and resilient sealing wiper are sectioned in respective like-configured curved segments for disassembly without removing adjacent segments during inspections. Inboard of the sealing ring is a flanged seal ring having an outer surface diameter limited in size to allow positioning the seal ring within the sealing wiper. The seal ring is fitted on an outer perimeter of a bearing retainer positionable within the sealing ring, thereby positioning the seal ring outer surface in sliding engagement with the sealing wiper during rotor shaft rotation. The outer cover positioning and the engaging relationship between seal ring and sealing wiper operate to minimize contaminants intrusion along the rotor shaft during rotation.
REFERENCES:
patent: 2390204 (1945-12-01), Curtis
patent: 3565447 (1971-02-01), Joachim et al.
patent: 4804315 (1989-02-01), Ferris
patent: 5071319 (1991-12-01), McCafferty
patent: 5074494 (1991-12-01), Doolin
patent: 5266008 (1993-11-01), Ehrbar
Conklin Tracy A.
Parsons Wayne C.
Greer Jack K.
United States of America, as represented by the Secretary of Arm
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