Pressure sealing device for the gap between two coaxial cylindrical surfaces
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United States of America Patent
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-
Jul 9, 1991
Grant Date -
N/A
app pub date -
Nov 28, 1989
filing date -
Nov 30, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A device for sealing the gap between a substantially cylindrical outer surface of a body and a coaxially surrounding and substantially cylindrical wall surface against a fluid pressure, particularly hydraulic liquid pressure, which pressure is greater on one side of the device than on the other, comprising a peripheral groove made in one of said cylindrical surfaces and in which is inserted at least one slotted sealing ring having an edge surface which resiliently and sealingly engages a portion of the other cylindrical surface radially opposite to the peripheral groove, the one surface and the other surface being mutually static and/or rotatable and/or axially movable as well as arranged with comparatively great radial play, a non-slotted support ring being mounted at the low-pressure side of the slotted sealing ring. For obtaining an effective sealing action in spite of said radial play between the surfaces, the non-slotted support ring is mounted with smallest possible clearance to the other surface and extends partialy into the peripheral groove in the one surface, the slotted sealing ring furthermore having a required great play relative to the peripheral groove bottom in view of the radial gap between the surfaces.
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