Electricity: motive power systems – With particular motor-driven load device – Power- or motion-transmitting mechanism
Patent
1995-05-05
1996-12-10
Sircus, Brian
Electricity: motive power systems
With particular motor-driven load device
Power- or motion-transmitting mechanism
482 91, 318286, 318471, 318433, A63B 21002
Patent
active
055834035
ABSTRACT:
An exercise machine which can independently vary the force and the speed at the user end is developed. The exercise machine includes a constant torque, variable speed reversible motor, a temperature controlled magnetic particle clutch, a gear reducer, a controller, and a suitable lever mechanism. The motor, clutch and gear reducer are chosen in a combination in order to achieve a predetermined output so that any combination of isotonic, isokinetic, isometric, isotonic/isokinetic, constant, variable, active, passive, uni-directional or bi-directional exercise routines can be performed with the exercise machine. With suitable lever modifications, the resistance providing unit can be successfully modified to emulate a shoulder press, bench press, leg exercise machine, arm exercise machine, etc. The output parameters, user force and user speed, are controlled in real time to maintain accuracy. This is made possible by the use of a PC-based controller interfaced to off-the-shelf motor and clutch control boards. A user interface written in C programming language helps facilitate maintenance of user exercise records for future reference, maintains the large array of protocols and encourages direct user participation for protocol selection. The PC-based controller can also be replaced with a microcontroller-based controller to minimize the cost. The machine features three different levels of safety ensuring total user safety and minimizing any chances of mishaps.
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Anjanappa Muniswamappa
Miller Warren G.
Sircus Brian
University of Maryland Baltimore Campus
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