| 摘要 |
Manual braking system with a variable braking force for a wheelchair or other wheeled vehicles. Caliper type brakes positioned to mount on and exert braking force on disks mounted to interior "disk" hubs rotatably mounted to the wheelchair or wheeled vehicle frame wheel hubs are mated with the "disk" hubs with a push button release pin allowing the wheel to be quickly removed without disturbing disk braking system. Caliper brakes are actuated by a manual lever, cam, cable and pulley assembly mounted to the frame of the wheelchair or wheeled vehicle. Notches in a curved edge of the cam are positioned to receive a cylindrical sleeve bearing assembly mounted to the brake lever assembly. The force on the lever arm exerted by the sleeve bearing assembly is sufficient to hold it within a notch and prevent movement of the lever without manual force and allowing the user to maintain a manual braking force without the use of his hands.
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