High precision liquid dispenser
US9296603B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2015 |
| Grant date | Mar 29, 2016 |
| Priority date | — |
| Expiry date | Jun 12, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01G13/24
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
In one embodiment, a liquid dispenser includes a liquid reservoir, a load cell supporting at least a partial weight of the liquid reservoir, an electrically actuated valve coupled to a tube outlet exiting from a bottom of the liquid reservoir, and a processor. The processor is electrically connected to the load cell and operatively coupled to and controlling operation of the valve. Further, the processor is configured to determine a valve open time for dispensing a requested amount of liquid. The valve open time depends upon a preliminary time based on the requested amount and an output from the load cell, and an adjustment to the preliminary time based on a difference between a requested amount and a measured amount determined by the load cell for at least one previous dispense.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.