Sealing device for screw threads

Details Sealing device for screw threads Sealing device for screw threads

F - Mech Eng,Light,Heat,Weapons

16

J

142/33, 277/49

F16J 15/16 (2006.01)

Patent

CA 1148987

ABSTRACT OF THE DISCLOSURE 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.

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