Closed loop calibrator and process of calibrating a liquid metering device in a closed atmosphere
US6244094A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1998 |
| Grant date | Jun 12, 2001 |
| Priority date | — |
| Expiry date | Aug 28, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F25/17
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A closed loop calibrator and process for calibrating a liquid metering device in a closed atmosphere such that the liquid being metered is not exposed to the atmosphere. In one embodiment, a calibrator is disclosed which comprises a body member containing a calibration chamber, and first and second fluid passage within the body member in spaced relationship to the calibration chamber, where when the first fluid passage is connected to a device to be calibrated and the second fluid passage is connected to a container, a closed system is formed having no exposed passages to the atmosphere. Additionally, the first fluid passage is in fluid communication with a lower end of the calibration chamber, and both the first and the second fluid passage are in fluid communication with an upper end of the calibration chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.