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US 4,226,431 AGranted
Sealing device for screw threads
AssigneeParker-Hannifin Corporation
InventorsJerry G. Jelinek, Orville J. Bain
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AssigneeParker-Hannifin Corporation
InventorsJerry G. Jelinek, Orville J. Bain
Estimating the term…
A sealing device for preventing fluid leakage between a screw and a nut threaded thereon. The thread on the screw includes a cylindrical crest and a helical rounded groove. The device includes an annular elastomeric member having inner and outer peripheral surfaces. The inner peripheral surface includes an axially extending sealing surface which engages the thread crest and a radially inwardly extending sealing projection which engages the thread groove. A relatively rigid support member is radially aligned with the axially extending sealing surface for resisting radially inward deflection thereof. The support member is discontinued at a location aligned with the sealing projection, so that the sealing projection can be radially inwardly deflected by fluid pressure to tightly seal against the thread groove.
A sealing device for sealing between first and second telescoped parts, said device comprising an annular elastomeric member having inner and outer peripheral surfaces, said inner peripheral surface being arranged for sealing engagement with one of said parts and including an axially extending sealing surface and a radially inwardly extending sealing projection, said sealing projection extending through an arc of predetermined circumferential extent, a relatively rigid axially extending support disposed in radially outward alignment with said axially extending sealing surface, said support being discontinued for a predetermined circumferential extent at a location in radially outward alignment with said projection, and said circumferential extent of said discontinuity being substantially as great as said circumferential extent of said sealing projection.
A sealing device for sealing between first and second telescoped parts, said device comprising an annular elastomeric member having inner and outer peripheral surfaces, said inner peripheral surface being arranged for sealing engagement with one of said parts and including an axially extending sealing surface and a radially inwardly extending sealing projection, said sealing projection extending through an arc of predetermined extent, said arc being less than 360 degrees, a relatively rigid support at least partially imbedded in said elastomeric member, said support having an axially extending portion disposed in radially outward alignment with said axially extending sealing surface for resisting radially inward deflection of said axially extending sealing surface, and said elastomeric member being unsupported by such support at a location in radially outward alignment with at least a major portion of said circumferential extent of said projection for permitting radially inward deflection of said projection.
In combination, a threaded together screw and nut, said nut having a bore with a cylindrical wall, said screw having a thread with a groove and a crest, a sealing device within said bore, said device comprising an elastomeric member having an inner peripheral surface and an outer peripheral surface, said inner peripheral surface being in sealing engagement with said screw, said inner peripheral surface including an axially extending sealing surface engaging said crest and a radially inwardly extending sealing projection engaging said groove, a relatively rigid axially extending support device disposed in radially outward alignment with said axially extending sealing surface for resisting radially inward deflection of said axially extending sealing surface, said support being discontinued and interrupted for substantially the entire circumferential extent of said projection at a location in radially outward alignment with said projection for permitting radially inward deflection of said projection.
Dependencies are inferred from the claim text.