US3768880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball bearing device with barrier seal
Assignee: Individual
•
Filing: 1971-08-27
•
Granted: 1973-10-30
•
Expires: 1991-08-27
Abstract
Abstract A ball bearing device has a substantially frictionless, barrier seal between a cage with ball bearings and an outer shield. Said seal extends around the outer surface of the inner raceway and in close contact therewith and is normally spaced from said cage and also from the inner surface of the outer raceway and from said outer shield, and said outer shield is spaced from the outer surface of the inner raceway.
Inventors
- 👤 W Howe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:04
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/72; F16C33/76; F16C33/78; F16C33/7896; F16C33/80; F16C19/00; F16C19/02; F16C19/04; F16C19/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
104 words
A ball bearing device comprising an outer raceway, an inner raceway spaced from the latter, ball bearing means between said outer and inner raceways, a barrier seal outside of said means and extending around and contacting the exterior surface of said inner raceway and being adjacent to, but spaced from, the inner surface of said outer raceway, said barrier seal being stretchable and its inner circumferential surface being normally of lesser diameter than the exterior surface of said inner raceway and adapted, when stretched to extend around the latter, and a shield outside of said barrier seal and between said inner and outer raceways.
Claim 2
Dependent Claim
104 words
A ball bearing device comprising an outer raceway, an inner raceway spaced from the latter, ball bearing means between said outer and inner raceways, a barrier seal outside of said means and extending around and contacting the exterior surface of said inner raceway and being adjacent to, but spaced from, the inner surface of said outer raceway, said barrier seal being stretchable and its inner circumferential surface being normally of lesser diameter than the exterior surface of said inner raceway and adapted, when stretched to extend around the latter, and a shield outside of said barrier seal and between said inner and outer raceways.
Claim 3
Dependent Claim
36 words
A ball bearing device as of claim 1, said outer raceway inner surface having another groove therein, said shield extending into said latter groove, said shield overlapping said seal in a direction towards said outer raceway.
Claim 4
Dependent Claim
15 words
A ball bearing device as of claim 1, said barrier seal being formed of tetrafluoroethylene.
Claim 5
Dependent Claim
23 words
A ball bearing device as of claim 1, said outer raceway inner surface having a groove therein, said shield extending into said groove.
Claim 6
Dependent Claim
30 words
A ball bearing device as of claim 4, said outer raceway inner surface having another groove therein outside the first-mentioned groove, and a retainer ring extending into said another groove.
Claim 7
Dependent Claim
36 words
A ball bearing device as of claim 4, said outer raceway inner surface having another groove therein, said shield extending into said latter groove, said shield overlapping said seal in a direction towards said outer raceway.
Claim 8
Dependent Claim
15 words
A ball bearing device as of claim 1, said seal being spaced from said shield.
Claim 9
Dependent Claim
52 words
A ball bearing device as of claim 1, and another barrier seal and shield as set forth in claim 1; but opposite to and spaced from said first-mentioned seal and shield, said ball bearing means being between the first-mentioned seal and shield and the another seal and shield and spaced from them.
References Cited (Backward Citations)
US2267875A
Cited
US2275996A
Cited
US2375166A
Cited
US2701732A
Cited
US3071385A
Cited
US3350148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |