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US 12,630,392 B2Granted
Safety device for an elevator
AssigneeOtis Elevator Company
InventorMasahiro Yamamoto
Life of this patent
Estimating the term…
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.
Claims9
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;
- further comprising a light switch for turning on and off a light fixture installed in the hoistway that is electrically connected to the human detection sensor, wherein the human detection sensor is configured to prevent movement of the elevator car in response to the ON operation of the light switch.
3 more elements
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;
- wherein the human detection sensor includes a current detector for the detection of current of the external device in response to the ON operation of the external device, and a human detection relay connected to the current detector and the elevator controller to produce an output to the elevator controller to prevent movement of the elevator car in response to the detection of the current of the external device.
2 more elements
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;
- sensing ON operation of a light fixture installed in the hoistway;
- and
- producing an output to an elevator controller to prevent movement of the elevator car based on the sensed ON operation of the light fixture;
- wherein sensing the ON operation of the external device includes detecting the current of the external device in response to the ON operation of the external device.
4 more elements
Dependencies are inferred from the claim text.