The patented Safe•t mate Anti-Rollback Device is the industry standard for thousands of facilities nationwide. The device works completely by spring tension. A padded lever beneath the seat is depressed when the occupant is seated. This lever is connected to a pair of stainless steel brake arms that are held just off the surface of the rear tires.
As the occupant begins to lift weight from the seat, the spring force causes the lever to rotate upward; in turn, the brake arms rotate down to engage the tires. The greater the rearward force on the chair, the greater the braking power.