Method and apparatus for preparation of liquids containing suspended material for examination
US4022576A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 18, 1976 |
| Grant date | May 10, 1977 |
| Priority date | — |
| Expiry date | May 18, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01L3/502
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Method and apparatus for preparing a sample of liquid containing suspended material. The apparatus includes an elongated container with an open end, the internal cross section of the container being tapered to a smaller area near the closed end, and an elongated tube having, in one preferred embodiment, a hollow chamber of increased cross section near one end of the tube. The tube is insertable in the container so that the outer periphery of the chamber sealingly engages the inner wall of the container to seal a predetermined volume of liquid at the closed end of the container. The tube has an open lower end protruding into the predetermined volume of liquid, and has a sealed upper end fitted with a resilient bulb to facilitate withdrawal of the liquid into the hollow chamber. In an alternative embodiment, a sealing collar is employed instead of the hollow chamber, and the sample liquid is withdrawn into the tube itself. The method of the invention includes introducing a known volume of liquid into the container and concentrating the material in the end portion thereof. The elongated tube is inserted into the container until the chamber or the sealing collar comes into sealing cont…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.