External pressure display for vehicle tires
US6647771B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 10, 2001 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Jan 9, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60C23/04
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A magnetically coupled pressure display system particularly adapted for pneumatic tires of motor vehicles includes pressure transducer coupled for rotating a magnet field source within the tire and an external magneto-optical liquid crystal display attached to or integrally incorporated into the exterior sidewall of the tire for visually indicating pressure within the tire responsive to the orientation of the magnetic field source within the tire. The external display exploits the magneto-optical effects of liquid crystals and can be conformally and permanently attached to the outer tire sidewall surface. Elements (pixels) comprising the display have selective light polarization properties globally determined by direction (orientation) of the magnetic field each experiences, the primary component of which is that provided by the magnetic field source rotated by the pressure transducer within the vehicle tire.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.