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2010-12-08T01:43:40+01:00
2010-11-17T09:20:50Z
2010-12-08T01:43:40+01:00
Jouve S.A., EPO - Publication - KB, TaggedPDF v1.27
EP-0301731-A3-19890308
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EP-0301731-A3-19890308
A seal assembly for closing the end of a bearing includes a seal (40) and a shield (42) to which the seal is bonded. The shield has an axially directed mounting portion (50), an axially directed overhang (56) and a radial end wall (54) between the mounting portion and overhang. The seal has a pumping labyrinth (70) presented toward the mounting portion, yet spaced from it, a dirt lip (72) directed obliquely toward and contacting the mounting portion, and a secondary lip (74) directed obliquely toward but normally spaced from the overhang. The labyrinth is exposed toward the interior of the bearing and has pumping cavities (86) which impel lubricant back into the bearing. Between the dirt and secondary lip is an annular groove (78) containing a ring of lubricant grease which extends up to the radial wall and forming a barrier to the ingress of contaminants. If the ring of lubricant becomes temporarily pressurized, it deflects the secondary lip (74) against the overhang (56) to prevent excessive leakage, the pressure being relieved through vent notches (112) in the contacting edge of the lip.
A seal assembly for closing the end of a bearing includes a seal (40) and a shield (42) to which the seal is bonded. The shield has an axially directed mounting portion (50), an axially directed overhang (56) and a radial end wall (54) between the mounting portion and overhang. The seal has a pumping labyrinth (70) presented toward the mounting portion, yet spaced from it, a dirt lip (72) directed obliquely toward and contacting the mounting portion, and a secondary lip (74) directed obliquely toward but normally spaced from the overhang. The labyrinth is exposed toward the interior of the bearing and has pumping cavities (86) which impel lubricant back into the bearing. Between the dirt and secondary lip is an annular groove (78) containing a ring of lubricant grease which extends up to the radial wall and forming a barrier to the ingress of contaminants. If the ring of lubricant becomes temporarily pressurized, it deflects the secondary lip (74) against the overhang (56) to prevent excessive leakage, the pressure being relieved through vent notches (112) in the contacting edge of the lip.
en
European Patent Office
EP0301731
EP 0301731
F16J 15/32
F16J 15/40
F16J 15/447
F16C 33/76
B61F 15/22
Seal assembly
Seal assembly - European Patent Office - EP 0301731 A3
Seal assembly - European Patent Office - EP 0301731 A3
Adobe PDF Library 8.0
"EP0301731"; "EP 0301731"; "F16J 15/32"; "F16J 15/40"; "F16J 15/447"; "F16C 33/76"; "B61F 15/22"; "Seal assembly"
1.4
1
B
2
EP
0301731
A3
1989-03-08
88306461
1988-07-14
US
79175
1987-07-29
US
124814
1987-11-23
F16J 15/32
F16J 15/40
F16J 15/447
F16C 33/76
B61F 15/22
THE TIMKEN COMPANY
Otto, Dennis L.
Brooke-Smith, Fred
Seal assembly
Dichtung
Seal assembly
Joint d'étanchéité
A seal assembly for closing the end of a bearing includes a seal (40) and a shield (42) to which the seal is bonded. The shield has an axially directed mounting portion (50), an axially directed overhang (56) and a radial end wall (54) between the mounting portion and overhang. The seal has a pumping labyrinth (70) presented toward the mounting portion, yet spaced from it, a dirt lip (72) directed obliquely toward and contacting the mounting portion, and a secondary lip (74) directed obliquely toward but normally spaced from the overhang. The labyrinth is exposed toward the interior of the bearing and has pumping cavities (86) which impel lubricant back into the bearing. Between the dirt and secondary lip is an annular groove (78) containing a ring of lubricant grease which extends up to the radial wall and forming a barrier to the ingress of contaminants. If the ring of lubricant becomes temporarily pressurized, it deflects the secondary lip (74) against the overhang (56) to prevent excessive leakage, the pressure being relieved through vent notches (112) in the contacting edge of the lip.
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