Wheelchair with lever drivetrain
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United States of America Patent
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-
Sep 30, 2014
Grant Date -
Mar 14, 2013
app pub date -
Jun 10, 2011
filing date -
Oct 28, 2009
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A manually powered wheelchair includes a first lever associated with a first rear wheel and demountably coupled to a first drivetrain, the first lever having a first brake thereon. The wheelchair also includes a second lever associated with a second rear wheel and demountably coupled to a second drivetrain, the second lever having a second brake thereon. Each drivetrain includes a chainring, a chain, and a freewheel, and each drivetrain has a fixed gear ratio. The freewheel of each drivetrain is actuated by manual pivoting of the lever associated therewith. In use, the wheelchair achieves changes in mechanical advantage when a user shifts the user's hands up and down the first and second levers.
First Claim
Family
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Cited Art Landscape
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