Split piston metering pump
US11793929B2 · kind B2 · utility
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132References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2019 |
| Grant date | Oct 24, 2023 |
| Priority date | — |
| Expiry date | May 27, 2042 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/1422
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A micropump according to the invention uses axially oriented pistons to define a pump volume. Translating the pistons axially with respect to each other within a pump housing draws a metered amount of fluid into the pump volume from a reservoir port for delivery to a cannula port when the space is collapsed. Radially situated seals on the pistons cooperate with the axial movement to close off and open the cannula port and the reservoir port respectively at different positions of the piston stroke.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.