Temperature and pressure compensating indicator
US6595046B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Sep 25, 2001 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Sep 25, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60C23/0496
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A tire pressure gauge apparatus for securing to a vehicle tire valve stem mounted to a tire valve stem port in a vehicle tire includes an apparatus housing containing a received air chamber for placement in fluid communication with received air from within a vehicle tire and containing a biasing air chamber containing a fixed quantity of biasing air, the chambers being sealingly separated from each other by a pressure equilibration structure which includes a pressure indicator element, the pressure equilibration structure moving within the housing to alter the relative volumes of the two chambers and thus to equalize the pressures of the two chambers, and the pressure indicator element moving relative to the apparatus housing as the equilibration structure moves to equalize chamber pressures to display a tire pressure reading.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.