Multi-stage sprocket assembly for bicycle
US5192249A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 26, 1991 |
| Grant date | Mar 9, 1993 |
| Priority date | — |
| Expiry date | Feb 26, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62M9/10
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A multi-stage sprocket assembly for a bicycle is disclosed. In the assembly, a concave portion is provided in a small-sprocket-side face of a large sprocket for avoiding interference with a drive chain disengaged from a height-reduced tooth of the large sprocket, such that a link-connecting portion of the chain is received at a dedendum or a stepped portion of the large sprocket. Teeth of the small sprocket is phase-arranged with the receiving portion of the large sprocket such that a portion of the chain extending substantially straight rearwardly in a drive rotation direction of the sprocket assembly from the link-connecting portion of the chain received by the receiving portion of the large sprocket is engageable with a tooth of the small sprocket. The stepped portion receives the link-connecting portion at a position lower than the dedendum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.