Mechanical sealing apparatus

Details Mechanical sealing apparatus Mechanical sealing apparatus

2005-03-29

2005-03-29

Miller, William L. (Department: 3677)

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

C277S518000, C277S520000

Reexamination Certificate

active

06871857

ABSTRACT:
Disclosed herein is a mechanical sealing device for preventing fluid leakage. The sealing device has a sealing chamber formed by a flange, a seal casing and a seal cover at a position outside a gland ring. This gland ring is used for holding the gland packings installed in a stuffing box of each of rotary and stationary sealing rings. The rotary and stationary sealing rings are provided in the sealing chamber. In this case, the rotary sealing ring is fixed to a sleeve. The stationary sealing ring comes into contact with both the sleeve and the rotary sealing ring, and is held by a slip ring biased by a spring. The spring is provided between the stationary sealing ring and the flange. Further, the sealing device has an additional sealing ring, which is provided on the inner surface of each of the gland ring and the seal cover, and comes into contact with the sleeve.

REFERENCES:
patent: 3582089 (1971-06-01), Amorese
patent: 3591188 (1971-07-01), Eisner
patent: 3877706 (1975-04-01), Haas et al.
patent: 6325378 (2001-12-01), Okumachi et al.
patent: 20010052673 (2001-12-01), Okumachi et al.

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