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and a four-bar linkage holds the drive wheel secure when actuated.Also,
because the intended users are paraplegics with active lifestyles,the drive
wheels have been tilted toward the user to make pushing easier,and the wheelbase is narrow for cornering in hallways or maneuvering behind desks.
The frame is adjustable to fit the dimensions of the individual user.Anti-tipping wheels are available to hinder tip-over accidents.