Liquid dispenser having flow rate compensation
US5823388A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 18, 1996 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Nov 18, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB67D1/1234
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for dispensing a predetermined quantity of a liquid from a dispensing pump. A recirculation path from the dispensing pump to a bulk reservoir is configured to be substantially identical to the dispensing path itself. Periodically, a recirculation cycle is undertaken and the flow rate during the recirculation cycle is determined. With the recirculation and dispensing paths being identical, the dispensing rate for the dispensing path is then known. The method for accurately determining the recirculation rate is derived from Boyle's law to determine the specific volume dispensed in a specific recirculation cycle time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.