Bearing seal

• US 6,485,185 B1
• Filed: 08/16/2000
• Issued: 11/26/2002
• Est. Priority Date: 08/16/1999
• Status: Expired due to Fees

• Current Assignee: Roller Bearing Industries, Inc. (Greenbrier Cos., Inc.)
• Original Assignee: Roller Bearing Industries, Inc. (Greenbrier Cos., Inc.)
• Inventors: Chu, Timothy K., Steets, Paul G., Paul, Michael E., Price, Paul R., Conway, Daniel T. Jr.
• Primary Examiner(s): Footland, Lenard A.
• Application Number:
  US09/639,233
• Time in Patent Office: 832 Days
• Field of Search: 384/571, 384/480, 384/484, 384/486, 384/488
• US Class Current: 384/484
• CPC Class Codes: F16C 19/364 with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
• CPC Class Codes: F16C 33/7813 for tapered roller bearings
• CPC Class Codes: F16C 33/7886 mounted outside the gap between the inner and outer races, e.g. sealing rings mounted to an end face or outer surface of a race
• CPC Class Codes: F16C 33/80 Labyrinth sealings F16C33/761 takes precedence
• CPC Class Codes: F16J 15/3252 with rigid casings or supports
• CPC Class Codes: F16J 15/3256 comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals

Abstract

A seal for use with a tapered roller bearing includes a seal affixed to a first seal support, and comprises an inner sealing member in contact with a second seal support, an outer sealing member extending toward and contacting the second seal support, and a central sealing member extending toward but not contacting the second seal support. A rain shield covering a gap between the first and second seal supports may also be included.

Claims

1. A seal assembly for use with a tapered roller bearing, the seal assembly comprising:

an upper seal support with a vertically extending portion, a lower seal support having a horizontally extending portion and a vertically extending portion, and a seal coupled to the vertically extending portion of the upper seal support and having a corrugated portion extending vertically down and curving along the horizontally extending portion of the lower seal support, the seal assembly being configured for coupling to the tapered roller bearing.

2. The seal assembly of claim 1 wherein the seal is formed of a PTFE material.

3. The seal assembly of claim 1 wherein the seal further comprises a portion extending toward and contacting the vertically extending portion of the lower seal support.

4. A seal assembly configured for use with a tapered roller bearing, the seal assembly comprising:

first seal support with a vertically extending portion;

a second seal support having a horizontally extending portion and a vertically extending portion; and

a seal coupled to the vertically extending portion of the first seal support, the seal comprising;

a first seal member curving along the horizontally extending portion of the second seal support, and

a second seal member extending toward and contacting the vertically extending portion of the second seal support, wherein the seal further comprises a non-contact seal member extending toward but not contacting the second seal support and located between the first and second seal members.

5. The seal assembly of claim 4 wherein the seal assembly lacks a garter spring.

6. The seal assembly of claim 5, further comprising a horizontally extending rain shield covering a gap between the first and second seal supports.

7. The seal assembly of claim 4 wherein the seal comprises a PTFE material.

8. The seal assembly of claim 4, further comprising a horizontally extending rain shield covering a gap between the first and second seal supports.

9. The seal assembly of claim 8, wherein the rain shield is affixed to the first seal support and rotatable relative to the second seal support.

10. The seal assembly of claim 8, wherein the rain shield is affixed to the second seal support and rotatable relative to the first seal support.

11. The seal assembly of claim 8, wherein the rain shield comprises a rubber compound.

12. The seal assembly of claim 8, wherein the first seal member is corrugated.

13. The seal assembly of claim 12, wherein the non-contact seal member comprises at least two tines.

14. The seal assembly of claim 13, wherein one of the at least two tines is separated from the second seal support by a greater distance than the other of the at least two tines.

15. The seal assembly of claim 4, wherein the first seal member is corrugated.

16. The seal assembly of claim 4, wherein the non-contact seal member comprises at least two tines.

17. The seal assembly of claim 16, wherein one of the at least two tines is separated from the second seal support by a greater distance than the other of the at least two tines.

18. A seal assembly configured for use in a tapered roller bearing journaling a shaft with an axis of rotation, comprising:

a first seal support having a radial portion extending generally perpendicular to the axis;

second seal support having an axial portion extending generally parallel to the axis and a radial portion extending generally perpendicular to the axis; and

a seal coupled to the radial portion of the first seal support, the seal having an inner sealing member in contact with and curving along the axial portion of the second seal support, a central sealing member extending toward but generally not contacting the second seal support, and an outer sealing member in contact with the radial portion of the second seal support.

19. The seal assembly of claim 18 wherein the inner sealing member is corrugated.

20. The seal assembly of claim 18 further comprising a rain shield covering a gap between the first and second seal supports.

21. The seal assembly of claim 18 wherein at least one of the sealing members comprises a PTFE material.

22. The seal assembly of claim 21 wherein the inner sealing member is corrugated.

23. The seal assembly of claim 22 further comprising a rain shield covering a gap between the first and second seal supports.

24. The seal assembly of claim 23 wherein the rain shield comprises a rubber compound.