Vehicle lane guide and alerting device
Patent 5568137 Issued on October 22, 1996. Estimated Expiration Date: 
September 26, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 26, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesHighway line detector Patent #: 4143264 InventorApplicationNo. 533711 filed on 09/26/1995US Classes:340/905, Highway information (e.g., weather, speed limits, etc.)250/239, Housings (in addition to cell casing)250/397, With detector340/901, EXTERNAL CONDITION VEHICLE-MOUNTED INDICATOR OR ALARM340/904, Transmitter in one vehicle only340/942PhotoelectricExaminersPrimary: Hofsass, JefferyAssistant: Pope, Daryl International ClassG08G 001/09AbstractA vehicle lane guide and alerting device securable to a vehicle for monitoring a position of the vehicle on a lane of a roadway delimited by light-reflective lane markers wherein the markers have a different reflectivity than the roadway itself, the vehicle lane guide and alerting device including a photo sensor mechanism coupled to a front end of the vehicle for capturing light that is reflected from the roadway; a differentiator mechanism coupled to the photo sensor mechanism for discriminating a sharp change in the reflected light above a given level when the vehicle crosses the lane markers on the roadway; a buffer mechanism coupled to the differentiator mechanism for registering the change in the reflected light; and an alarm mechanism coupled to the buffer mechanism for providing an alarm indication once the change in the reflected light is registered to thereby indicate that the vehicle is moving out of the lane.Field of SearchHighway information (e.g., weather, speed limits, etc.)Transmitter in one vehicle only EXTERNAL CONDITION VEHICLE-MOUNTED INDICATOR OR ALARM Photoelectric Internal alarm or indicator responsive to a condition of the vehicle Operation efficiency (e.g., engine performance, driver habits) Housings (in addition to cell casing) With detector | |
