| 摘要 |
A brake assembly for a rotatable wheel in which the rim of the wheel has an integrally formed lip extending from the side thereof and forming a trough. A Kevlar TM aramid fiber jacketed cable, positioned in the trough, encircles the lip in the direction of rotation of the wheel. The cable is affixed to the frame at one end and to an operating lever at the other end. Moving the lever tensions the cable and applies a frictional load to the trough to brake the wheel. In a second embodiment, a pair of opposed lips, one on either side of the rim, increases the braking effect.
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