Seal construction for pump apparatus
US5171029A · kind A · utility
64Cited by
45References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1991 |
| Grant date | Dec 15, 1992 |
| Priority date | — |
| Expiry date | Aug 20, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/102499
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An endless path calibration system comprising a sensor cassette having a flow-through passage and at least one sensor to be calibrated, a chamber coupled to the sensor cassette to define an endless path and a sterile calibration liquid in the endless path. A gas injection passage for injecting gas into the sterile calibration liquid and a gas vent leading from the endless path to the exterior of the endless path. A check valve allows gas to escape from the endless path and substantially prevents gas and liquid from entering the endless path through the gas vent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.