Foldable bicycle frame
US5222751A · kind A · utility
Inventor
Key dates
| Filing date | Jan 22, 1991 |
| Grant date | Jun 29, 1993 |
| Priority date | — |
| Expiry date | Jan 22, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/32532
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A foldable bicycle frame comprises a front triangular portion and a rear triangular portion. The former includes a top tube, a down tube, a head tube and a seat tube while the latter contains a bottom bracket tube, a seat stay, a chain stay and a seat tube. Both front and rear triangular portions are hinged by means of upper and lower coupling pieces so that they can pivot to be folded. Upon being unfolded, both front and rear triangular portions are held securely by virtue of a seat stay which extends beyond the seat tube to be fastened securely to the top tube. Front and rear triangular portions can be also held so securely in another manner that a seat post is inserted into connection tube and seat tube which are coaxially arranged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.