Fluid dispensing apparatus and method
US8668117B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 2008 |
| Grant date | Mar 11, 2014 |
| Priority date | — |
| Expiry date | May 27, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F11/028
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A fluid dispenser contains and dispenses metered amounts of fluid, and in some embodiments comprises a reservoir for containing fluid; a chamber positioned substantially within the reservoir for containing a quantity of fluid; and a piston moveable within the chamber in a first direction to draw fluid into the chamber from the reservoir, and movable in a second direction to discharge a metered amount of fluid from the chamber. A user-manipulatable control can be coupled to the piston to move the piston with respect to the chamber, and in some cases to select the desired metered amount of fluid to be dispensed. Also, a pawl can be used to selectively permit and inhibit movement of the piston in the first and/or second directions to prevent partial doses from being dispensed from the fluid dispenser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.