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Hill Assist Wheelchair With Enhanced Safety

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This wheelchair is designed with multiple subsystems specifically developed for a user who lives in a hilly or mountainous area. The design allows the user to be able to exert the same amount of energy when moving on either flat or inclined planes. To ensure safety, an anti-rollback system, an anti-tip mechanism and a braking system are incorporated. A modified driving mechanism has been implemented to allow for increased the speed.

The anti-tip system prevents the wheelchair from tipping more than 30 degrees from its normal position. The anti-roll back system will not slip on a 30-degree grade. The braking mechanism will stop an uncontrolled descent within an average distance of five feet. No prototype was built for the driver mechanism, because the calculated dimensions were found to be faulty. The allowed width was exceeded, and the placement of the system could not be determined without rebuilding the entire wheelchair. The total project cost was approximately $320.

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as of: 
02/25/2009