Bearings – Rotary bearing – Antifriction bearing
Patent
1986-07-29
1987-10-13
Levy, Stuart S.
Bearings
Rotary bearing
Antifriction bearing
277153, 277166, 384477, F16C 3376, F16J 1532
Patent
active
046995269
ABSTRACT:
A sealing device which is fitted between the outer and inner races of a bearing has a sealing lip portion comprised of a first sealing lip positioned closer to the outer side of the bearing which is exposed to the atmosphere and a second sealing lip positioned closer to the interior of the bearing which is to be filled with oil. Both the first and second sealing lips are respectively provided with first and second sealing portions each of which is formed by the intersection between a first inclined surface inclined with respect to the axis of rotation of the bearing in such a manner that the degree of inclination thereof increases toward the outer side of the bearing and a second inclined surface inclined with respect to the axis of rotation of the bearing in such a manner that the degree of inclination thereof increases toward the interior of the bearing. The angle formed by the first inclined surface and the mating peripheral surface of the inner race of the bearing is set at a value which is larger than the angle formed by the second inclined surface and the mating peripheral surface of the inner race. The second sealing lip is provided with an axially hollowed annular recess formed in a lateral surface portion thereof at the back of the second sealing portion thereof.
REFERENCES:
patent: 3685838 (1972-08-01), Malmstrom
patent: 3790238 (1974-02-01), Otto
patent: 3921992 (1975-11-01), Bertin
patent: 4166628 (1979-09-01), Blaydon
patent: 4210339 (1980-07-01), Povejsil
patent: 4588195 (1986-05-01), Antonini et al.
patent: 4616837 (1986-10-01), Beutel
Hannon Thomas R.
Levy Stuart S.
NOK Corporation
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