(US5354248-A)      The exercise apparatus has a vertically movable weight, and an input pedal mechanism engaged by the user to input an input power with a unidirectional exercise force at a user-selected velocity for moving the negative braking power with a unidirectional braking force opposing the exercise force. The braking power has a braking velocity for permitting downward movement of the weight. a brake controller controls the application of the brake to maintain the braking velocity at a selected constant velocity for at least a selected portion of the user's exercise time.    A differential member is coupled to the weight and receives the input power and the braking power. The differential member determines a differential between the user-selected velocity and the selected constant braking velocity, and applies the resultant to movement of the weight. if the user-selected velocity is greater than the braking velocity, the weight is lifted, and if the user-selected velocity is less than the selected constant braking velocity, the weight is lowered. If they match, the weight is maintained in a stationary elevated position.    USE/ADVANTAGE -   Controlled velocity exercise machine which provides a constant speed throughout the desired range of motion.    (EP625362-A1)      The exercise appts. includes a vertically movable weight, and an input mechanism engaged by the user to apply a positive input power with a unidirectional force at a user selected velocity for moving the weight upwardly. A brake applies a negative braking power to oppose the exercise force at a partic. braking velocity for controlling downward movement of the weight. A brake controller governs the application of the brake to maintain a constant braking velocity.    A differential member is coupled to the weight, and receives the input exercise and the braking forces to determine a differential between the user selected velocity and the selected braking velocity. The resultant force is applied to the weight to cause it to be raised or lowered. The user can hold the weight at a raised position when the applied exercise force matches the braking velocity.    USE/ADVANTAGE -   Aerobic exercise machine for improving muscle strength and coordination. Independent control of both velocity and load.    (EP625362-B1)      The exercise appts. includes a vertically movable weight, and an input mechanism engaged by the user to apply a positive input power with a unidirectional force at a user selected velocity for moving the weight upwardly. A brake applies a negative braking power to oppose the exercise force at a partic. braking velocity for controlling downward movement of the weight. A brake controller governs the application of the brake to maintain a constant braking velocity.    A differential member is coupled to the weight, and receives the input exercise and the braking forces to determine a differential between the user selected velocity and the selected braking velocity. The resultant force is applied to the weight to cause it to be raised or lowered. The user can hold the weight at a raised position when the applied exercise force matches the braking velocity.    USE/ADVANTAGE -   Aerobic exercise machine for improving muscle strength and coordination. Independent control of both velocity and load.