Dual operational and brake light control for trailers
US6177865A · kind A · utility
28Cited by
9References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1998 |
| Grant date | Jan 23, 2001 |
| Priority date | — |
| Expiry date | Jun 15, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60Q1/305
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A dual operational and stop light control for adapting combined stop and turn signal lights on a trailer to independent stop signal and turn signal lights on a towing vehicle. The adaptor has a pair of switching circuits, each including a PNP transistor connected in series with an NPN transistor to chassis ground and each transistor connected to both stop and turn signal circuits of the towing vehicle and also to an NPN output transistor which is connected to an independent voltage source to drive the trailer signal lights independent of the voltage at the towing vehicle signal lights.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.