Bicycle bottom bracket/crank assembly
US5335928A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1993 |
| Grant date | Aug 9, 1994 |
| Priority date | — |
| Expiry date | Sep 16, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2165
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A bicycle comprises a frame having a sleeve portion adapted to support a bottom bracket/crank assembly and having an annular opening having its axis oriented substantially orthogonally to a vertical-longitudinal center plane of the bicycle, a bearing support ring attached to the sleeve portion in cantilevered relation and having an external bearing seat surface oriented substantially orthogonally to the vertical-longitudinal center plane, and a thin wall large diameter angular contact bearing having an inner race received on the bearing seat surface of the ring. A driving sprocket wheel set having an internal bearing seat surface is received on an outer race of the bearing. A first crank member having a crank arm located on the side of the sprocket wheel set opposite from the frame sleeve portion is fastened to the sprocket wheel set for rotation therewith. A sleeve portion of the first crank member overlies the opening in the sleeve portion. A second crank member having a crank arm located on the side of the frame sleeve portion opposite from the sprocket wheel set includes a sleeve portion overlying the opening in the frame sleeve portion. Fasteners connect the ends of the sleeve…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.