Inboard derailleur for multispeed bicycles
US4023424A · kind A · utility
Inventors
Key dates
| Filing date | Nov 10, 1975 |
| Grant date | May 17, 1977 |
| Priority date | — |
| Expiry date | Nov 10, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62M9/1246
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The derailleur is mounted inboard as respects the bicycle frame. It is aligned with the rear drive sprockets. The take-up cage carrying sprocket wheels over which the slack part of the chain passes is carried on an actuating rod or stem, which engages a positioning means which provides for positive transfer of the chain from one drive sprocket to another, and for positive alignment of the take-up means and drive chain with individual drive sprockets. The positioning means is in the form of overlying plates, having overlying slots configurated to positively guide the stem carrying the take-up cage to assure the positive transfer of the drive chain, and positive alignment with individual drive sprockets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.