F - Mech Eng,Light,Heat,Weapons – 16 – J
Patent
F - Mech Eng,Light,Heat,Weapons
16
J
277/38
F16J 15/24 (2006.01) F16H 25/24 (2006.01) F16J 15/32 (2006.01) F16J 15/48 (2006.01)
Patent
CA 1132621
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 and 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 there- between. The outer tips of the ribs seal against a cylindrical wall of the nut recess but each tip is deflectable out contact with much 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 outer 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 tip and thus the device is suitable or high pressure.
321491
Bain Orville J.
Jelinek Jerry G.
Parker Michael James
Ridout & Maybee Llp
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