Fluid dispenser with zero displacement sealing device
US11173514B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2020 |
| Grant date | Nov 16, 2021 |
| Priority date | — |
| Expiry date | Feb 24, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J133/14
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A fluid dispenser for dispensing small doses of fluid includes a dispenser housing, a diaphragm assembly, a displacement chamber, and a dispensing luer. The dispenser housing has a first end for receiving the fluid and a second end for dispensing the fluid. The dispenser housing defines a fluid flow path from a receiving chamber adjacent the first end to a dispensing chamber adjacent the second end. The diaphragm assembly includes a first diaphragm within the receiving chamber and a second diaphragm within the dispensing chamber wherein the first diaphragm is operably connected to the second diaphragm. The diaphragm assembly is movable between a first position wherein the first diaphragm moves the fluid from the receiving chamber to the dispensing chamber along the fluid flow path and a second position wherein the second diaphragm moves the fluid from the dispensing chamber to the displacement chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.