School bus stop arm and drive unit therefor
US11554715B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2019 |
| Grant date | Jan 17, 2023 |
| Priority date | — |
| Expiry date | Jul 12, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60Q2400/50
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A school bus stop arm and drive unit therefor are disclosed. The stop an includes a stop sign and a drive unit for moving the stop sign between a retracted position and a deployed position. The drive unit comprises a motor operably coupled to the stop sign, one or more position sensors operable to detect the presence of the stop sign, and a controller for controlling operation of the motor. The controller configured to, monitor one or more operating characteristics of the motor for conditions indicative of an obstruction to movement of the stop sign, monitor the position sensor for a confirmation signal indicative of the presence of the stop sign in the deployed or retracted position, and based on the conditions indicative of an obstruction and the confirmation signal, determine if the stop sign has reached one of the deployed and retracted positions or is being obstructed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.