Accurate dosing pump
US6991137B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 23, 2002 |
| Grant date | Jan 31, 2006 |
| Priority date | — |
| Expiry date | Jun 23, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/1059
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
With the subject invention, a pump is formed that generally includes a reservoir formed to accommodate at least one fluid dose, and a fluid-collecting chamber in fluid communication with the reservoir. The fluid-collecting chamber includes a dose-control portion which encompasses a volume defined by two dimensions. A first piston is disposed to urge fluid from the reservoir and at least into the dose-control portion. A second piston is disposed to reversibly slide within at least the dose-control portion of the fluid-collecting chamber. A nozzle is also provided which is located such that fluid displaced by the second piston from the dose-control portion is generally urged towards the nozzle. A check valve may be placed in the fluid path between the dose-control portion and the nozzle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.