Mixing rotary positive displacement pump for micro dispensing
US6691895B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 28, 2002 |
| Grant date | Feb 17, 2004 |
| Priority date | — |
| Expiry date | Jan 28, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F13/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A dispensing apparatus, which is capable of delivering precise quantities of a liquid product less than one mm3 in size, includes a drive mechanism, a housing made up of at least two input channels coupled to a chamber made up of a first portion and a second portion. First and second component liquids are delivered via the first and second input channels respectively to the chamber and the first and second input channels are disposed so that interaction is hindered between the first component liquid and the second component liquid in either input channel. At least one feed screw with a helical thread is disposed in the chamber such that when the at least one feed screw is rotated by the drive mechanism the first and second component liquids are mixed to form a liquid product and the feed screw rotation also discharges the liquid product from the chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.