Invacare Electric wheelchair - Manual (Page 26)

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5.2 Taking Obstacles
5.2.1 The ”SureStep“ System
The Invacare® Typhoon is fitted with "SureStep" technology. When climbing over obstacles, the
front steering wheels are raised using the torque generated by the drive wheels.
Please note that the techniques required for overcoming obstacles for wheelchairs fitted with
central drives and "SureStep" technology is completely different to that required for models with
front wheel or rear wheel drive.
5.2.2 The ”Stability Lock“ System
If your wheelchair is fitted with a lifter and this is raised, this will restrict the function of the
"SureStep" system due to the "Stability Lock". The "Stability Lock" increases the tilt stability of the
wheelchair and prevents front wheel spring deflection on the "Walking Beams" when braking or
when descending slopes.