Mechanical seal device

Details Mechanical seal device Mechanical seal device

2005-07-19

2005-07-19

Peavey, Enoch (Department: 3676)

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

C277S390000, C277S391000, C277S392000

Reexamination Certificate

active

06918593

ABSTRACT:
A primary technical goal of the present invention is to provide a mechanical seal device in which a manufacturing cost of the parts is decreased, a satisfactory seal performance is exhibited even under severe operating conditions, and the device can be easily mounted outside relative to the housing. The mechanical seal device comprises a first diaphragm, a stationary seal ring, a rotary seal ring, a second diaphragm and a fluid passage which guides a sealed process fluid to the respective pressure receiving grooves of the first diaphragm and the second diaphragm wherein the first diaphragm retains a fixing section which is fixed relative to the mounting portion of a seal cover, a retaining section and a first pressure receiving face, the stationary seal ring retains a seal face which is retained by the retaining section, the rotary seal ring retains an opposing seal face which stays in a sealing contact with the seal face, and the second diaphragm is shaped and dimensioned in more or less an identical manner relative to the first diaphragm and retains a retaining section, a fixing section and a second pressure receiving face thereon.

REFERENCES:
patent: 4558872 (1985-12-01), Vossieck et al.
patent: 4936593 (1990-06-01), Finney
patent: 5199720 (1993-04-01), Radosav et al.

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