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US 6,386,765 B1Granted
Bottom bracket having a hollow shaft with larger diameter
OwnerDouglas Chianginventor
Life of this patent
Estimating the term…
Abstract
A bottom bracket for bicycles includes a tube with a hollow shaft received therein and two first grooves are defined in an outer periphery of the hollow shaft. Two collars each have a second groove are mounted to the hollow shaft and balls are engaged with the first grooves and the second grooves. An inner tube is mounted to the hollow shaft and engaged between the two collars. Two races are respectively engaged with two ends of the tube and each race has a positioning flange for engaging with two respective second ends of the collars.
Claims6
A bottom bracket for bicycles, comprising:
- a tube;
- a hollow shaft having two first grooves defined in an outer periphery of said hollow shaft, said tube mounted to said hollow shaft;
- two races mounted to said hollow shaft and each having a second groove defined in an inner periphery thereof, balls engaged with said first grooves and said second grooves;
- an inner tube mounted to said hollow shaft and engaged between two respective first ends of said two races, and
- two collars respectively engaged with two ends of said tube and each collar having a positioning flange extending radially inward from an inner periphery thereof, said two positioning flanges engaged with two respective second ends of said raes.
2 more elements
Dependencies are inferred from the claim text.