Hydraulic shaft sealing arrangement for high-temperature...

Details Hydraulic shaft sealing arrangement for high-temperature... Hydraulic shaft sealing arrangement for high-temperature...

2008-03-18

2008-03-18

Patel, Vishal (Department: 3673)

Seal for a joint or juncture

Seal between relatively movable parts

Close proximity seal

C277S432000

Reexamination Certificate

active

11203199

ABSTRACT:
On a hydraulic shaft sealing arrangement for high-temperature applications, a heat protection ring (21) and an air chamber (22) are arranged before the annulus (8) containing the sealing medium (10) for thermal insulation, while spacers (16, 17) for the generation of a pumping action are provided in the annulus continuously supplied with fresh sealing medium (oil) to accelerate liquid transport. The hazard of coking and oil carbon deposition is thereby minimized. A split design of the annulus with an inserted annular ring also provides for an improved hydraulic shaft sealing arrangement optimized for weight, overall height, manufacture and assembly time.

REFERENCES:
patent: 4157881 (1979-06-01), Kasuya
patent: 6164658 (2000-12-01), Collin
patent: 6516618 (2003-02-01), Bock
patent: 6568688 (2003-05-01), Boeck
patent: 2003/0168815 (2003-09-01), Rensch
patent: 1 045 178 (2000-10-01), None
patent: 1 327 802 (2003-07-01), None
patent: 2 125 118 (1984-02-01), None

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