Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1973-12-20
1976-03-09
Aegerter, Richard E.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277177, 277206A, 277209, F16j 1540
Patent
active
039428052
ABSTRACT:
A sealing ring for sealing between a stationary first member and a second member coaxially rotatable in relation to said first member and having a rotationally symmetric surface zone. The sealing ring is adapted for stationary attachment relative to said first member and elastically deformable at its portion located closest to said second member. The sealing ring further includes two annular surface portions provided in spaced relationship to each other along said portion, said surface portions during absence of external actuation sealingly abutting the rotationally symmetric surface zone on said second member and having between themselves an intermediate annular groove, into which open a plurality of channels. The channels supply a pressure medium to a space defined by said second member and the walls of said groove and build up in said space a pressure such that between each annular surface portion and the rotationally symmetric zone on the second member a narrow annular gap is formed, through which the pressure medium can leak out to the ambient. A plurality of partition walls extend from the bottom of the groove up to the level of the annular surface portions and transversely across the groove from one annular surface portion to the other, thereby dividing the annular intermediate groove into a corresponding number of groove sections separated from each other, at least one channel opening into each such groove section, so that upon co-action of the sealing ring with said second member each groove section constitutes a separate pressure chamber.
REFERENCES:
patent: 3047299 (1962-07-01), Karsten
patent: 3815926 (1974-06-01), Vore
Aegerter Richard E.
Footland L.
Rosen Daniel M.
SKF Industrial Trading and Development Company B-V.
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