Bicycle gear crank assembly
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 5, 1991
Grant Date -
N/A
app pub date -
Nov 26, 1990
filing date -
Dec 5, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A bicycle gear crank assembly includes a crank having a boss portion fittable to a crank shaft, and a chainwheel mounted on the crank boss portion. The chainwheel includes a largest sprocket and at least one smaller sprocket coaxial with the largest sprocket. The crank boss portion is provided with backup arms located on the side of the largest sprocket laterally away from the smaller sprocket. The backup arms extend radially outward from the crank boss portion to contact the largest sprocket radially outwardly of the crank boss portion, so that the backup arms prevent the largest sprocket from laterally bending in a direction away from the smaller sprocket.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully