An anti-tipper is a device or mechanism attached to a wheelchair to prevent it from tipping over backward. It is a safety feature designed to enhance the stability and prevent accidents while using a wheelchair.

The anti-tipper typically consists of one or two small wheels or bars that extend downward from the back of the wheelchair frame. These wheels or bars are positioned in such a way that they contact the ground before the main wheels of the wheelchair lift off the ground during a potential tip-over situation. When the anti-tipper makes contact with the ground, it provides stability and prevents the wheelchair from tipping backward.

The anti-tipper serves as a crucial safety measure, especially when navigating inclines or negotiating obstacles. It helps distribute the weight of the occupant and the wheelchair more evenly, reducing the risk of tipping backward. This feature is particularly important for individuals with limited balance or upper body strength, as well as for those who may engage in activities that increase the risk of tipping, such as leaning back or reaching for objects.

It's worth noting that not all wheelchairs come with anti-tippers as a standard feature, but they can often be added or retrofitted to existing wheelchairs to enhance safety and stability.