Patent US3608398A successfully refreshed from Google Patents.
US3608398A
Expired / Lapsed
US
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Bicycle hub having a built-in three-stage speed change mechanism
Assignee: Shimano Inc
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Filing: 1969-09-15
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Granted: 1971-09-28
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Expires: 1989-09-15
Abstract
Abstract A BICYCLE HUB HAVING A BUILT-IN THREE-STAGE SPEED CHANGE MECHANISM IN WHICH A HIGH AND A NORMAL SPEED-RATIO TRANSMISSION RATCHET GEARING ARE ARRANGED ADJACENT TO EACH OTHER, AND AN AUTOMATC SPEED-RATIO CONTROL MEANS IS PROVIDED CONSISTING OF CENTRIFUGAL GOVERNOR WEIGHTS OSCILLATABLE INWARDLY AND OUTWARDLY AROUND THE AXIS OF SAID HUB IN SYNCHRONISM WITH EACH OTHER ACCORDING TO THE DRIVING SPEED OF THE BICYCLE, SAID RATCHET GEARINGS BEING ADAPTED TO BE AUTOMATICALLY PUT INTO AND OUT OF ENGAGEMENT INDIVIDUALLY BY THE COMMON SPEED-RATIO CONTROL MEANS UPON OSCILLATION THEREOF THEREBY EFFECTING AUTOMATIC THREE-STAGE SPEED CHANGE.
Inventors
- 👤 Takashi Segawa
- 👤 Ryuichi Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:06
CPC Classifications
B; B62; B62M; B62M11/00; B62M11/04; B62M11/14; B62M11/16
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |