Driver alerting device
US4803488A · kind A · utility
18Cited by
16References
10Claims
0Family size
Assignees
Inventor
Key dates
| Filing date | Aug 13, 1986 |
| Grant date | Feb 7, 1989 |
| Priority date | — |
| Expiry date | Aug 13, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S367/909
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A driver alerting device includes a transceiver adapted for mounting at the rearward end of a vehicle for directing its wave output rearwardly of the vehicle. Return wave signals for many objects within the transceiver range are picked up and supplied to the transceiver by an antenna. Any resultant doppler shift signal is amplified for driving an audio alarm adapted for placement within the passenger compartment of the vehicle. The circuit is adapted for electrical connection to the back-up light circuit of the vehicle for activation only when the vehicle transmission is engaged in reverse gear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.