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A human performance dynamometer for testing eccentric contractions and also concentric contractions of the human muscles. The dynamometer provides for free-limb acceleration during concentric contractions, whereby the user can accelerate the input shaft of the dynamometer to the set speed without an

A human performance dynamometer for testing eccentric contractions and also concentric contractions of the human muscles. The dynamometer provides for free-limb acceleration during concentric contractions, whereby the user can accelerate the input shaft of the dynamometer to the set speed without any resistance from the dynamometer. The dynamometer has two parallel shafts which are geared together and rotate in opposite directions to one another. The dynamometer has an input shaft for connection to limb engaging means. A motor is operatively connected to one of the parallel shafts through a speed reducer. Located on each shaft is an overrunning spray clutch, each of which may be disengaged from the system if eccentric contractions are desired for one or both directions of rotation of an input shaft. Each outer race of the respective overrunning clutch is connected to its respective parallel shaft. The inner race of each overrunning clutch is geared to the input shaft. A spring clutch on one of the parallel shafts is used to lock together the inner race and the outer race of one of the overrunning clutches, thereby allowing for eccentric contractions in both directions of the rotation of input shaft when the other overrunning clutch is disengaged. A motor controller is also provided for controlling the motor.

대표청구항 ▼

An improved human performance dynamometer for testing muscle contractions of a user exerted against a limb engaging means, the dynamometer comprising: a first parallel shaft; a second parallel shaft; a rotative power means rotating in a first rotational direction at a first rotational speed, said ro

An improved human performance dynamometer for testing muscle contractions of a user exerted against a limb engaging means, the dynamometer comprising: a first parallel shaft; a second parallel shaft; a rotative power means rotating in a first rotational direction at a first rotational speed, said rotative power means connected either to the first parallel shaft or the second parallel shaft; first gearing means for gearing together the first parallel shaft and the second parallel shaft; a first overrunning clutch supported on the first parallel shaft, said first overrunning clutch having a first outer race and a first inner race; a second overrunning clutch supported on the second parallel, a shaft, said second overrunning clutch having a second outer race and a second inner race; an input shaft connected to the limb engaging means; second gearing means for gearing the input shaft to the first inner race and the second inner race, whereby when the user exerts a force in a second rotational direction on the limb engaging means, the input shaft rotates in the second rotational direction, and the first inner race and the second inner race both rotate in the first rotational direction and whereby when the user exerts a force in the first rotational direction on the limb engaging means, the input shaft first rotates in the first rotational direction, and the first inner race and the second inner race both rotate in the second rotational direction; first engagement means for locking the first outer race to the first parallel shaft and for unlocking the first outer race from the first parallel shaft; and second engagement means for locking the second outer race to the second parallel shaft and for unlocking the second outer race from the second parallel shaft, whereby when the first outer race is locked to the first parallel shaft and the second outer race is locked to the first parallel shaft, rotation of the limb engaging means by the user in either the first rotational direction or the second rotational direction at a second rotational speed which is proportional to the first rotational speed results in concentric muscular contractions with free-limb acceleration.