Crank drive with periodic change of effective lever length
US11993342B2 · kind B2 · utility
0Cited by
13References
15Claims
0Family size
Inventor
Key dates
| Filing date | Jul 18, 2019 |
| Grant date | May 28, 2024 |
| Priority date | — |
| Expiry date | Jul 18, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H37/02
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In order to form a largely oval circulatory path, in particular a pedal (1a), a crank drive (1) is described which periodically changes the effective lever length of a crank (2). In this case, gear levers (4′ or 7) are mounted on a crank (2) at both ends (2 a, 2b) which rotate in opposite directions with respect to one another and thus form two further movement axes within the pedal path and are thus adapted to the natural human leg movement in a force-saving and ergonomic manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.