Patent US3554620A successfully refreshed from Google Patents.
US3554620A
Expired / Lapsed
US
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Track roller assembly
Assignee: Individual
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Filing: 1968-10-30
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Granted: 1971-01-12
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Expires: 1988-10-30
Abstract
Abstract A TRACK ROLLER ASSEMBLY FOR TRACK-LAYING VEHICLES HAS A ROLLER SHELL MOUNTED ON A STATIONARY SHAFT BY MEANS OF AXIALLY SPACED BEARINGS, AND THE INNER RACES OF THE BEARINGS ARE ENGAGED AT ONE END BY ELASTOMERIC RINGS BACKED UP BY CIRCULAR WASHERS AND SPLIT RETAINER RINGS MOUNTD IN GROOVES ON THE SHAFT. SEALING ASSEMBLIES AT EACH END OF THE ROLLER SHELL EACH INCLUDE A PAIR OF ANNULAR CLAMPING PLATES HAVING OUTER PERIPHERIES ENGAGING AN O-RING MOUNTED IN A GROOVE IN THE ROLLER SHELL, AND INNER PERIPHERIES SUPPORTING A LIP-TYPE SEAL HAVING ROTARY CONTACT WITH THE SHAFT.
Inventors
- 👤 Frank E Dalton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:11
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/72; F16C33/76; F16C33/78; F16C33/7886; F16C13/00; F16C13/006; F16C35/00; F16C35/04; F16C35/06; F16C35/063; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3248; F16J15/3252; F16J15/3268; F16J15/3276; F16C35/067
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |