Determining separation distance of two surfaces in a hostile environment
US6668903B1 · kind B1 · utility
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3References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 29, 2001 |
| Grant date | Dec 30, 2003 |
| Priority date | — |
| Expiry date | Jan 13, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D17/32
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A sensor for measuring the distance between two surfaces injects pressurized fluid (e.g., air) between the surfaces. The pressurized fluid passes through two flow restrictors prior to reaching the surfaces to be measured. The fluid pressures between the flow restrictors and between the downstream flow restrictor and the surfaces are compared to yield the distance between the two surfaces. An accurate distance measurement can be obtained even where the surfaces to be measured are located in a hostile environment which would destroy many other types of sensors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.