Liquid discharging apparatus and method for discharging liquid
US6539986B2 · kind B2 · utility
9Cited by
4References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 7, 2001 |
| Grant date | Apr 1, 2003 |
| Priority date | — |
| Expiry date | Sep 7, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B2205/03
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
To eliminate influence of discharge amounts depending on changes in liquid level of a liquid storage tank and to improve discharge accuracy of a liquid discharging apparatus.By a pressure regulating opening portion for forming a reference liquid surface maintaining a given pressure, pressure inside a pump chamber before a discharging operation is kept constant without affecting liquid level existing in the liquid storage tank. Therefore, volume of the inside of the pump chamber is kept constant and liquid can be discharged with higher precision.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.