Shaft seal assembly

Details Shaft seal assembly Shaft seal assembly

2007-05-01

2007-05-01

Patel, Vishal (Department: 3673)

Seal for a joint or juncture

Seal between relatively movable parts

Diverse and distinct dynamic seals

C277S350000, C277S362000, C277S431000

Reexamination Certificate

active

10393918

ABSTRACT:
A primary technical goal of this shaft seal device is to decrease the pressure of a sealant at a communication passage between a fluid chamber and a first seal portion, to further reduce the pressure by a floating ring, to make the first seal portion pressure-proof for sealing a high pressure process fluid, and to reduce the cost of the shaft seal device by simplifying its structure. The device comprises a fluid chamber being located between the first seal portion and the second seal portion, an intake passage being communicated to a communication passage between the fluid chamber and the first seal portion for allowing a sealant S to flow in, a floating ring being disposed within the fluid chamber and defining a pressure reduction gap between its own inner surface and the rotary shaft, and an outlet passage being communicated to the pressure reduction gap for circulating the pressure reduced sealant.

REFERENCES:
patent: 2877026 (1959-03-01), Payne et al.
patent: 3591188 (1971-07-01), Eisner
patent: 3836157 (1974-09-01), Hummer
patent: 3963247 (1976-06-01), Nommensen
patent: 4406463 (1983-09-01), Fabrowsky
patent: 5468002 (1995-11-01), Wasser
patent: 6186509 (2001-02-01), Wada et al.
patent: 6210103 (2001-04-01), Ramsay
patent: 6412822 (2002-07-01), Omiya et al.
patent: 6494458 (2002-12-01), Uth

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