×

Motor-driven exercise apparatus having runaway prevention system

  • US 4,749,181 A
  • Filed: 09/30/1986
  • Issued: 06/07/1988
  • Est. Priority Date: 09/30/1986
  • Status: Expired due to Term
First Claim
Patent Images

1. In a machine having a moving surface on which a user may walk or run, a motor for driving the moving surface, and means for establishing motor speed commands, a control system comprising:

  • electronic processor command circuitry for storing and outputting motor speed command signals;

    motor control circuitry which receives motor speed command signals from the electronic processor command circuitry and sends speed control signals to the motor;

    speed sensing/feedback means for providing motor (or moving surface) speed information;

    the motor control circuitry including means for receiving information from the speed sensing means, and means for comparing that information to the motor speed commands;

    means for conveying the information from the speed sensing means to the electronic processor command circuitry;

    a motor shut-off switch for causing rapid stoppage of power to the motor;

    means for detecting a defect in the information from the speed sensing/feedback means to the electronic processor command circuitry; and

    means responsive to the defect detecting means for actuating the motor shut-off switch.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×