US3956943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bicycle sprocket wheel
Assignee: Maeda Industries Ltd
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Filing: 1973-10-05
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Granted: 1976-05-18
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Expires: 1993-10-05
Abstract
Abstract A bicycle sprocket wheel comprising a multi-speed free wheel assembly containing teeth thereof are set right and left alternatively for ensuring easier engagement with a running chain during gear change operation.
Inventors
- 👤 Kazuto Yamasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:29
CPC Classifications
B; B62; B62M; B62M9/00; B62M9/04; B62M9/06; B62M9/10; F; F16; F16H; F16H55/00; F16H55/02; F16H55/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
78 words
A bicycle sprocket wheel comprising a bicycle sprocket wheel body containing a plurality of teeth integrally formed along the peripheral surface of the sprocket wheel, said teeth having a base portion and a free end portion and being alternately disposed on the left and right side of said peripheral surface, said left and right side teeth being flush with the side of the sprocket wheel body and tapered from their base portion of their narrower free end portion.
Claim 2
Dependent Claim
78 words
A bicycle sprocket wheel comprising a bicycle sprocket wheel body containing a plurality of teeth integrally formed along the peripheral surface of the sprocket wheel, said teeth having a base portion and a free end portion and being alternately disposed on the left and right side of said peripheral surface, said left and right side teeth being flush with the side of the sprocket wheel body and tapered from their base portion of their narrower free end portion.
Claim 3
Dependent Claim
21 words
The bicycle sprocket wheel of claim 1, wherein the teeth extend perpendicularly from the peripheral surface of the sprocket wheel body.
Claim 4
Dependent Claim
116 words
A multi-speed free wheel assembly for a bicycle comprising a plurality of sprocket wheels and at least one chain means, each of said sprocket wheels comprising a plurality of teeth integrally formed along the peripheral surface of the sprocket wheel, said teeth having a base portion and a free end portion and being alternately disposed on the left and right sides of said peripheral surface, said left and right side teeth being flush with the side of the sprocket wheel body and tapered from their base portion to their narrower free end portion, said chain means being operatively associated with said sprocket wheels so that lateral shifting of the chain means between sprocket wheels is facilitated.
Claim 5
Dependent Claim
116 words
A multi-speed free wheel assembly for a bicycle comprising a plurality of sprocket wheels and at least one chain means, each of said sprocket wheels comprising a plurality of teeth integrally formed along the peripheral surface of the sprocket wheel, said teeth having a base portion and a free end portion and being alternately disposed on the left and right sides of said peripheral surface, said left and right side teeth being flush with the side of the sprocket wheel body and tapered from their base portion to their narrower free end portion, said chain means being operatively associated with said sprocket wheels so that lateral shifting of the chain means between sprocket wheels is facilitated.
Claim 6
Dependent Claim
21 words
The bicycle sprocket wheel of claim 3, wherein the teeth extend perpendicularly from the peripheral surface of the sprocket wheel body.
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) | 1979-05-18 | 1979-11-17 | 1980-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-18 | 1983-11-17 | 1984-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-18 | 1987-11-17 | 1988-05-18 | $7700.00 | Window Closed / Lapsed |