Chemical dispensing device
US4908190A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1987 |
| Grant date | Mar 13, 1990 |
| Priority date | — |
| Expiry date | Dec 31, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/4891
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A device for dispensing a chemical solution into a pipeline transporting a liquid under pressure irrespective of whether the liquid pressure varies between a maximum and a minimum or is substantially constant. The volume of solution dispensed is varied at times when the liquid pressure is varying by selection of an aperture from a plurality of apertures at varying axial positions, for placing the interior of the pipeline in communication with the interior of the enclosure above the solution level, at times when the level drops axially to the selected aperture; or, at time when the liquid pressure is substantially constant, by adjustment of the amount of liquid permitted to enter the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.