Patent ID: 11970899
Assignee: HALL LABS LLC
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 15:
16. An overhead door opener, comprising:
a motor;
a drive loop;
a door coupled to the drive loop;
a first transmission component coupled to the motor;
a second transmission component coupled to the door, the first and second transmission components comprising a one-way bearing to transmit torque from the motor to the drive loop, wherein torque applied from the drive loop to the motor causes the first transmission components to rotate relative to the second transmission component, wherein the motor is configured to raise and lower the door by applying power to the drive loop;
a first device coupled to the first transmission component and configured to observe rotation of the first transmission component; and
a second device coupled to the second transmission component and configured to observe rotation of the second transmission component, wherein a comparison between the rotation of the first and second transmission components is used to stop the motor in response to observing that the comparison deviates from an expected value by more than a predetermined threshold amount.