Crank arm for bicycles
US6564675B1 · kind B1 · utility
48Cited by
10References
2Claims
0Family size
Inventor
Key dates
| Filing date | Jul 23, 2002 |
| Grant date | May 20, 2003 |
| Priority date | — |
| Expiry date | Jul 23, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2164
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A crank arm for bicycles includes two end pieces and a hollow tube connected between the two end pieces. Each of the two end pieces has an engaging hole defined therethrough and an insertion which is inserted in respective one of two ends of the hollow tube. A compound material layer is coated to the outside of the two end pieces and the hollow tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.