Roller-skate with two wheels in line

摘要

A mechanical or hydraulic brake (4-6) can be provided. It incorporates brake blocks acting on one or all of the wheels or rollers (2). The brake can be of the rim- or disc-type and the tyres can be with or without inner tubes. The sole of the shoe or boot is connected to a longitudinal beam (1). The sole of the shoe may be pivoted (8) at its mid-point. There is a coil spring (7) under the ball of the foot, which helps to tilt the foot back toward a pivoted bell-crank (6) under the heel. Pressing down on this lever pulls on a rod or wire (5) to apply the brake shoe or block on the rear wheel.