Self-tightening type sealing device

Details Self-tightening type sealing device Self-tightening type sealing device

2004-09-21

2010-02-23

Patel, Vishal (Department: 3676)

Seal for a joint or juncture

Seal for well apparatus

Longitudinally actuated packer for above ground apparatus

C277S511000, C277S513000

Reexamination Certificate

active

07665738

ABSTRACT:
In a self-tightening type sealing device according to the present invention, not only a sealing member is tightened by an internal pressure, but also a tightening force imparting device which tightens the sealing member separately from the internal pressure is provided so as to be remotely operable by a controller. This construction remedies drawbacks involved in manual operation of the tightening force imparting device.

REFERENCES:
patent: 448874 (1891-03-01), Brewer
patent: 1324775 (1919-12-01), Anathor-Henriksen
patent: 4381868 (1983-05-01), Croy et al.
patent: 5908046 (1999-06-01), Mosman
patent: 61-170766 (1986-10-01), None
patent: 4-104298 (1992-09-01), None
patent: 11-51242 (1999-02-01), None
Mitsue Koizumi, et al. “Isotopic Pressing Technique”, Apr. 13, 1988; pp. 287-296.

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