All-terrain bicycle frame
US5533742A · kind A · utility
12Cited by
19References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 6, 1991 |
| Grant date | Jul 9, 1996 |
| Priority date | — |
| Expiry date | Aug 6, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62K3/10
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An injection molded, single-piece plastic bicycle frame which includes a generally upright stem, and a cantilever structure joined to and extending from opposite sides of the stem in a gently curving, downwardly facing reverse bend. The material forming the frame has a nonuniform internal structural density which is characterized by higher density adjacent the surface, and by decreasing density progressing toward the core. This material preferably takes the form of a foamed structural plastic material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.