Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1978-03-09
1979-06-26
Smith, Robert I.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 71, 277165, F16J 1524
Patent
active
041591186
ABSTRACT:
A sealing device for sealing between a screw and a nut threaded thereon. The device is particularly suitable for sealing a ball type screw wherein the thread on the screw includes a helical rounded groove and wherein the thread crest is a cylindrical surface. The device is mounted in a recess of the nut and includes an annular elastomeric member having on its inside surface ribs to seal against the screw thread crests and a projection to seal the groove. The radially outer portion of the elastomeric member is generally U shaped with radially extending ribs axially spaced to provide a recess therebetween. The outer tips of the ribs seal against a cylindrical wall of the nut recess but each tip is deflectable out of contact with such wall when the fluid pressure is high on the axially outer surface of that tip to permit the high pressure fluid to enter the recess between the lips to press the other tip into tighter sealing engagement with the nut wall and to press the projection and ribs into tighter sealing engagement with the screw. The lips are backed by rigid washers to permit the deflection and tighter sealing of the lip tips and thus the device is suitable for high pressure.
REFERENCES:
patent: 3116931 (1964-01-01), Edwards
patent: 3375014 (1968-03-01), Chubb et al.
patent: 3669460 (1972-06-01), Wysone
patent: 3869133 (1975-05-01), Pesendorfer
patent: 4053167 (1977-10-01), Jelinek
Bain Orville J.
Jelinek Jerry G.
Parker-Hannifin Corporation
Smith Robert I.
Wolfram John N.
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