US3842684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bicycle transmission
Assignee: Individual
•
Filing: 1973-05-17
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Granted: 1974-10-22
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Expires: 1993-05-17
Abstract
Abstract An improved transmission device for a bicycle, and which is mounted in place of a pedal crank so to produce as many as 15 forward speeds, and wherein the speeds may be varied without lost motion or slippage, the transmission comprising a gear box containing a gear train, and wherein there are no external sprockets except for the pedal crank''s sprocket and one at the bicycle rear wheel, and a lever arm for gear selection being mounted at or near the handle bars for changing gears, the lever arm being attached to selective forks inside the transmission for changing to a desired gear ratio.
Inventors
- 👤 L Lozier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:45
CPC Classifications
B; B62; B62M; B62M9/00; B62M9/04; B62M11/00; B62M11/04; B62M11/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
90 words
In a bicycle transmission, the combination of a gear box mounted in place of a pedal crank, said gear box containing gear train arrangements, said gear train arrangement on an idler shaft to other gears and returns to a sprocket and transmitted to a rear bicycle wheel by means of a chain, and a lever arm for gear selection being mounted at handle bars of the bicycle for changing gears by an operator, said lever arm being attached to selector forks inside transmission for changing to a desired gear ratio.
Claim 2
Dependent Claim
90 words
In a bicycle transmission, the combination of a gear box mounted in place of a pedal crank, said gear box containing gear train arrangements, said gear train arrangement on an idler shaft to other gears and returns to a sprocket and transmitted to a rear bicycle wheel by means of a chain, and a lever arm for gear selection being mounted at handle bars of the bicycle for changing gears by an operator, said lever arm being attached to selector forks inside transmission for changing to a desired gear ratio.
Claim 3
Dependent Claim
33 words
The combination as set forth in claim 1, wherein said gear box includes a filler plug and dip stick for maintaining a proper level of a lube oil contained within said gear box.
Claim 4
Dependent Claim
32 words
The combination as set forth in claim 2, wherein said gear box includes no external sprockets except for one at the pedal crank and one at the rear wheel of said bicycle.
Claim 5
Dependent Claim
24 words
The combination as set forth in claim 3, wherein speeds can be varied up or down at will without loss of motion or slippage.
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) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |