Bicycle sprocket
US7503864B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2005 |
| Grant date | Mar 17, 2009 |
| Priority date | — |
| Expiry date | Jul 11, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H55/30
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A bicycle sprocket basically has a metallic sprocket ring part and a synthetic resin fastening part that is configured to ensure that weight can be reduced and that loss of fastening force resulting from deterioration or deformation of the synthetic resin can be prevented. The metallic sprocket ring part includes a ring element with a plurality of sprocket teeth located on an outer periphery of the ring element, a plurality of connecting elements located on an inner periphery of the ring element and a plurality of internal fastening elements located on radial inner ends of the connecting elements, respectively. The synthetic resin fastening part is non-movably formed on both axial faces of the sprocket ring part at a location radially inwardly of the sprocket teeth so as to cover at least a portion of the inner periphery of the ring element, the connecting elements, and the internal fastening elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.