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US 11,628,348 B2Granted
Exercise machine emergency motor stop
AssigneeTonal Systems, Inc.
InventorsAly E. Orady, Thomas Kroman Watt
Life of this patent
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Abstract
A safety signal is sent to a relay coupled to a plurality of power leads of a motor wherein a default state of the relay is to short the plurality of power leads together and wherein the safety signal maintains the relay in an open state. The safety signal to the relay is deasserted in response to a determination that an unsafe condition has occurred.
Claims21
An exercise machine, comprising:
- a motor;
- and
- a relay coupled to the motor, wherein:
- a default state of the relay is to cause an opposing back EMF to motion in the motor;
- and
- the relay comprises a safety input configured to receive a safety signal to maintain the relay in a state other than the default state.
3 more elements
A method of safely operating an exercise machine, comprising:
- sending a safety signal to a relay coupled to a motor wherein a default state of the relay is to cause an opposing back EMF to motion in the motor and wherein the safety signal maintains the relay in a state other than the default state;
- and
- deasserting the safety signal to the relay in response to a determination that an unsafe condition has occurred.
Dependencies are inferred from the claim text.