Pressure calibration method and apparatus
US4909063A · kind A · utility
14Cited by
4References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 24, 1988 |
| Grant date | Mar 20, 1990 |
| Priority date | — |
| Expiry date | Oct 24, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L27/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A differential pressure calibrator (with built in overrange protection) using a "dropping ball and weight" technique and a mode unit which eliminates the need for a process manifold is disclosed in the subject invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.