Patent US3605513A successfully refreshed from Google Patents.
US3605513A
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US
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Multiple contact sprockets
Assignee: Tsubakimoto Chain Co
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Filing: 1969-09-08
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Granted: 1971-09-20
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Expires: 1989-09-08
Abstract
Abstract A SPROCKET WHEEL HAVING TWO SURFACES OF CONTACT FOR CONTACTING THE SAME ROLLER OF SPROCKET CHAIN. ONE OF THE CONTACT SURFACES CONSISTS OF AN ELASTIC MATERIAL AND CONTACTS THE ROLLER BEFORE THE OTHER CONTACT SURFACES. THIS IS BECAUSE THE ONE CONTACT SURFACE EITHER IS OUT OF PHASE WITH THE OTHER CONTACT SURFACE OR HAS A LARGER BOTTOM DIAMETER THAN THE OTHER CONTACT SURFACE. A CHAIN DRIVE SYSTEM USES A DRIVING WHEEL HAVING ONE ROW OF SPROCKETS FORWARDLY OUT OF PHASE OF ANOTHER ROW AND A DRIVEN WHEEL HAVING ONE ROW OF SPROCKETS REARWARDLY OUT OF PHASE WITH ANOTHER ROW.
Inventors
- 👤 Yoshiaki Sugimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:04
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/02; F16H55/30; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19623; Y10T74/19633; Y10T74/1987; Y10T74/19893; Y10T74/19898; Y10T74/19907
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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |