Liquid transfer device
US4511534A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 1982 |
| Grant date | Apr 16, 1985 |
| Priority date | — |
| Expiry date | May 26, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2035/00237
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The liquid transfer device includes a one-piece molded barrel plate having a plurality of syringe-type barrels extending downwardly therefrom and support flange extending downwardly about the perimeter of the barrel plate. An elastic membrane rests on and is substantially coextensive with the upper surface of the barrel plate. A retaining plate having a plurality of apertures in alignment with the respective barrels is detachably mounted on the barrel plate in either a first position wherein annular projections about each aperture lightly engage the membrane to hold it in place or a second position wherein the projections extend into each barrel to seal the membrane about the upper edge of each barrel. A plunger having a plurality of pins is placed on the retaining plate with the pins extending through the apertures to engage the membrane. Depressing and releasing the plunger will draw a predetermined amount of liquid into each barrel. The barrel plate, membrane and retaining plate can be packaged with or without a plunger as a sterile liquid transfer device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.