Safety device for an elevator
AssigneeOtis Elevator Company
InventorMasahiro Yamamoto
Life of this patent
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Abstract
A safety device includes an external device for the use of inspection within an elevator hoistway, and a human detection sensor in electrical communication with the external device and an elevator controller. The human detection sensor is configured to detect presence of a person within the hoistway in response to the ON operation of the external device to prevent movement of the elevator car.
Claims14
A safety device for an elevator, comprising:
- a human detection sensor,
- wherein the human detection sensor is configured to:
- detect activation of an external device that is in electrical communication with the human detection sensor;
- and
- produce an output to the elevator controller to prevent movement of the elevator car in response to said detection.
A safety device for an elevator, comprising:
- an external device for the use of inspection within an elevator hoistway;
- and
- a human detection sensor in electrical communication with the external device and an elevator controller,
- wherein the human detection sensor is configured to detect presence of a person within the hoistway in response to the ON operation of the external device and produce an output to the elevator controller to prevent movement of the elevator car.
A method of performing an elevator maintenance and inspection, the method comprising:
- plugging an external device for the use of inspection within an elevator hoistway to a human detection sensor that is connected to an elevator controller;
- and
- producing an output to the elevator controller to prevent movement of the elevator in response to the external device being plugged in to the human detection sensor.
A method of performing an elevator maintenance and inspection, the method comprising:
- sensing ON operation of an external device brought into an elevator hoistway by a maintenance technician during maintenance and inspection;
- and
- producing an output to an elevator controller to prevent movement of the elevator car based on the sensed ON operation of the external device.
Dependencies are inferred from the claim text.