Bus bar arrangement for uniformly heating a trapezoidally-shaped electrically heated windshield
US4543466A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 2, 1984 |
| Grant date | Sep 24, 1985 |
| Priority date | — |
| Expiry date | Jul 2, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B2203/016
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An electrically heated windshield of generally trapezoidal shape has been bus bars of uniform conductivity throughout their length extending in line contact with the upper and lower edges of a continuous uniformly thick trapezoidal-shaped electrically conductive coating provided on the windshield surface for deicing and defrosting the windshield. The line of contact of the upper bus bar with the conductive coating has a length generally equal to the entire effective length of the upper edge of the conductive coating. The lower bus bar is symetrically located along the lower edge of the conductive coating and has a line of contact length equal to the sum of the length of the upper bus bar plus generally about one-half the difference between the entire effective length of the lower edge of the conductive coating minus the length of the line of contact of the upper bus bar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.