INTEGRALLY CAST BICYCLE CHAIN TRANSMISSION
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United States of America Patent
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N/A
Issued Date -
Jan 28, 2010
app pub date -
Jul 20, 2009
filing date -
Jul 23, 2008
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The chain transmission includes a crank connected to a second crank by an axle of the chain transmission while forming one piece of a single support. The chain transmission axle is housed in a chain transmission tube with the interposition of two bearings arranged around the axle of the chain transmission near the ends of the latter in order to allow rotation of the chain transmission axle in the chain transmission tube. A large chain drive sprocket wheel is located near one of the ends of the chain transmission axle and rotates concomitantly with the latter. The cranks and the chain transmission axle are made of a composite material or a hollow lightweight alloy. A first and second intermediate bushing made of an abrasion-resistant material are attached to the chain transmission axle near one respective end of the latter to receive a respective bearing.
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