Crossing control arm for vehicles
US4697541A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 27, 1982 |
| Grant date | Oct 6, 1987 |
| Priority date | — |
| Expiry date | Sep 27, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60Q1/50
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A crossing arm unit for use on the front of school buses and the like to protect children walking in front of the school bus, the crossing arm unit including a frame attached to the front bumper of the school bus, and a movable arm pivotally mounted in the frame for movement between a retracted position along side the bumper and an extended position projecting outwardly from the bumper. The movable arm includes a pivot plate having a relatively small extending length and being formed of relatively heavy, strong metal, a support plate connected to the pivot plate to extend therefrom, the support plate being formed of a lighter material and having an extending length substantially greater than that of the pivot plate, and a U-shaped metal rod having a closed end portion and leg portions extending along the length of the support plate and being joined thereto at spaced locations, the rod having an extending length from the support plate that is substantially greater than the extending length of the support plate. A conventional drive is provided to move the arm member between its extended and retracted positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.