Sealing device for an instrumentation column
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United States of America Patent
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-
Oct 27, 1998
Grant Date -
N/A
app pub date -
Sep 30, 1996
filing date -
Mar 31, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A sealing device comprising a supporting assembly (9) containing sealing members (16) supporting the instrument column (5), and an assembly (17, 18) for lifting the instrument column (5) in sealing engagement with the supporting members (16). The sealing members (16) supporting the instrument column (5) include a clamping ring (28) and at least one O-ring seal (29, 30). Axial movement of the instrument column (5) enables clamping of the inner seal (30) via the clamping ring (28). When axial movement of the instrument column (5) is restricted, the seals may be clamped by means of a suitably sized clamping ring (28).
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