Unitary crank spindle assembly and method of fabrication
US9259777B2 · kind B2 · utility
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32References
4Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 8, 2010 |
| Grant date | Feb 16, 2016 |
| Priority date | — |
| Expiry date | Sep 7, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2164
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A bicycle is provided having a unitary steering tube-crown member and a unitary crank arm-spindle member. A multistage aluminum 3D forging process is used to form the unitary members. This may allow the fabrication of components with substantially hollow interior areas to reduce weight, reduce part count while maintaining high strength and ductility. The multistage 3D forging process provided also allows the combination of multiple components into a single unitary part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.