Parking brake alarm systems with driver absence detection
US10703270B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 9, 2019 |
| Grant date | Jul 7, 2020 |
| Priority date | — |
| Expiry date | Jul 9, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T17/18
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Vehicle parking brake warning systems are disclosed herein. In one implementation, a vehicle parking brake warning system may include a relay coupled to an operator warning system. The relay including a relay switch and a coil, the relay switch conductively couple the operator warning system to ground when closed, and the coil to cause the relay switch to open when an electrical current is flowing through the coil, the coil coupled to a first coil node and a second coil node. A brake status switch that couples the first coil node to a voltage source when closed. A driver status switch that couples the second coil node to ground when closed. And a capacitor coupled to the first coil node and the second coil node.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.