Fluid pressure operated sealing process and sealing means

Details Fluid pressure operated sealing process and sealing means Fluid pressure operated sealing process and sealing means

1987-07-15

1988-11-08

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 3, 277DIG7, F16J 1546

Patent

active

047830832

ABSTRACT:
To avoid friction losses or the striking of a sealing part (1) against the edge of a sealing surface interruption, the movement of the sealing part (1) into and out of contact with the sealing surface is controlled by the medium to be sealed, so that there is a sealing contact only at that moment in which there is an overpressure in the area to be sealed. This control takes place through the vacuum produced in the sealing gap (8) during the brief flow therethrough and the relative overpressure with respect thereto on the opposite side (10) of the sealing part (1). In the differential pressure-less state, the sealing part is e.g. held by a spring (6) at a distance from sealing surface (5).

REFERENCES:
patent: 3273899 (1966-09-01), Warnery
patent: 3694894 (1972-10-01), Jelinek et al.
patent: 3729030 (1973-04-01), Brissenden
patent: 4065137 (1977-12-01), Rueggeberg et al.
patent: 4498678 (1985-02-01), Vestergaard

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