Apparatus for dispensing a medium and method for front filling the apparatus
US10350632B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 20, 2015 |
| Grant date | Jul 16, 2019 |
| Priority date | — |
| Expiry date | Jan 27, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D83/76
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An apparatus for dispensing a medium includes a cartridge in which a piston is movably receivable. An outlet is arranged in an outlet face of the cartridge for conveying the medium into a storage chamber of the cartridge. The piston includes a conveying side, a drive side disposed opposite the conveying side and at least one seal arranged at a side wall of the piston for providing a fluid-tight sealing between the piston and an inner cartridge wall. The cartridge includes a protrusion or a recess. The protrusion or the recess and the piston are arranged such that they can engage in such a way that, when the piston is arranged in a filling position, substantially no gas can be trapped between the outlet face, the conveying side of the piston and the seal facing the outlet face.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.