On-line liquid samplers
US4009617A · kind A · utility
Inventor
Key dates
| Filing date | Mar 18, 1976 |
| Grant date | Mar 1, 1977 |
| Priority date | — |
| Expiry date | Mar 18, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Sampling apparatus for periodically withdrawing small samples of liquid flowing through a pipe. The apparatus embodies an intake passage communicating with a T-section in the pipe. Liquid in the intake passage is pumped by a diaphragm which is pulsed pneumatically at periodic intervals. A check valve in the intake passage has one end projecting into the diaphragm chamber and is pushed positively by the diaphragm to intake port-closing position. A second passage communicating with the intake passage has a pop valve which opens under the diaphragm-created pressure after the check valve closes. Each periodic sample is collected from the latter passage in a plastic bag or other container. The apparatus can be washed and sanitized while on line by hose and coupling unit placed on the apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.