Liquid dispensing system with controllably movable cartridge
US6082289A · kind A · utility
102Cited by
4References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 24, 1995 |
| Grant date | Jul 4, 2000 |
| Priority date | — |
| Expiry date | Aug 24, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05C5/02
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A liquid dispenser has a pump assembly with a housing and a cartridge that is movable relative to the housing between an upper non-dispensing position and a lower dispensing position. The movement is controlled by the selective introduction of air to create a column of air. The dispenser is otherwise biased downward. The movement of the dispenser can be used to avoid repeated upward and downward movement of a pump assembly. In a pump assembly with multiple dispensers, all but one can be raised while only the dispensing cartridge is lowered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.