US4051744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gear mechanism for preventing reverse rotation
Assignee: Seikosha KK
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Filing: 1976-10-15
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Granted: 1977-10-04
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Expires: 1996-10-15
Abstract
Abstract A drive pinion is provided with wide teeth and narrow teeth. A follower wheel is provided with teeth which have cut-away portions at their front sides. When the drive pinion rotates in reverse direction, one wide tooth makes contact with an apex of a tooth of the follower gear wheel thereby preventing the reverse rotation of the drive pinion.
Inventors
- 👤 Kenji Oshima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:05
CPC Classifications
F; F16; F16H; F16H1/00; F16H1/003; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/1987; Y10T74/19884; Y10T74/19949; Y10T74/19963; Y10T74/19972
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A gear mechanism for preventing reverse rotation comprising: a drive pinion having alternately disposed wide teeth and narrow teeth and having larger interdental spaces in front of the wide teeth than at the back thereof, and a follower gear wheel having teeth formed with cut-away portions at their front sides.
Claim 2
Dependent Claim
50 words
A gear mechanism for preventing reverse rotation comprising: a drive pinion having alternately disposed wide teeth and narrow teeth and having larger interdental spaces in front of the wide teeth than at the back thereof, and a follower gear wheel having teeth formed with cut-away portions at their front sides.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |