Hollow bicycle crankshaft
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 20, 1999
Issued Date -
N/A
app pub date -
Feb 28, 1996
filing date -
Dec 16, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A hollow bicycle crankshaft includes a hollow shaft assembly having a first shaft member fastened to a second shaft member, a hollow left crank arm, a hollow right crank arm, a tubular housing member, a first shaft bearing, a second shaft bearing, and a sprocket bracket. The first shaft member matingly engages the second shaft member. Non-mating ends of the shaft assembly are attached to respective hollow crank arms, where the shaft extends through an aperture in each arm. The union of the first and second shaft members is proximate the midsection of the constructed shaft assembly. The shaft assembly is housed within the tubular housing member. The first and second shaft bearings, disposed at each end of the housing member, secure the tubular housing member about the shaft assembly in coaxial and concentric alignment. The first shaft bearing is disposed at the end of the housing member that is adjacent to the sprocket bracket, and is larger than the second shaft bearing which is disposed on the opposing side of the housing member.
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