Dispensing cartridge with vented piston
US7621428B2 · kind B2 · utility
11Cited by
17References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 9, 2005 |
| Grant date | Nov 24, 2009 |
| Priority date | — |
| Expiry date | Jan 12, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0318
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A dispensing cartridge with a vented piston is disclosed. The piston includes a piston shell and a bleed plug. The arrangement of the piston shell and the bleed plug allows air to be vented through the piston until all of the air is vented out of the dispensing cartridge. With the air vented out of the dispensing cartridge, the piston self-actuates into a closed sealed position in which the bleed plug forms a seal with the piston shell to prevent further fluid from flowing between the two elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.