Safety device and method to prevent use of the same device if faulty
US11557905B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 6, 2017 |
| Grant date | Jan 17, 2023 |
| Priority date | — |
| Expiry date | Apr 23, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W4/80
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The present invention discloses a safety devices adapted to prevent workers from going into hazardous environment, such as underground using the faulty safety device. As a safety device, typically embodied as a cap lamp, must be charged prior to each use, the device is adapted to detect when the device is removed from the charger. The device starts to blink continuously when disconnected from the charger. An automated test procedure is completed on the device. The user may also complete a manual portion of the test procedure to make the device usable. When the test procedure is completed successfully, the lamp stops blinking. If the test procedure is not successful, the lamp continues blinking to effectively prevent user from using a faulty device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.