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Computerized exercise, physical therapy, or rehabilitating apparatus with improved features

  • US 5,230,672 A
  • Filed: 03/13/1991
  • Issued: 07/27/1993
  • Est. Priority Date: 03/13/1991
  • Status: Expired due to Fees
First Claim
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1. In combination with an exercise apparatus having a linearly extendable and retractable tension transmitting device having a first end connected to one of a plurality of user preselected force application devices and a second end connected to a movement control means which regulates the extension and retraction of the tension transmitting device, said control means being operably connected to a force measuring device which determines the tension applied to said tension transmitting device and provides an electronic signal representing a determined tension to a control computer, the improvement comprises:

  • means for initially calibrating said force measuring device before a user starts an exercise;

    wherein said force measuring device is a load cell;

    wherein said electronic signal is a load cell voltage output signal; and

    wherein said initially calibrating means performing an initial calibration by taking at least two samples of said load cell voltage output signal before said user applies any force to said one user preselected force application device, said initially calibrating means comparing said samples of said load cell voltage output signal with the changing factor of said plurality of user preselected force application devices and the environmental factors to determine if said samples of said load cell voltage output signal are within a preselected error range, said initially calibrating means repeating said initial calibration if said samples of said load cell voltage output signal is outside said preselected error range.

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