Dual component cartridge
US5566860A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1994 |
| Grant date | Oct 22, 1996 |
| Priority date | — |
| Expiry date | Sep 8, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D83/7713
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A cartridge for use in a dispensing gun for simultaneously dispensing and mixing a pair of chemically reactive fluid components maintained in separate chambers in the cartridge. One of the fluid components is contained in an elongated tube formed of a thin flexible film which is placed within a first chamber located either coaxially within an outer annular second chamber containing the other fluid component, or in a side-by-side relationship to the second chamber. Pistons are slidably mounted within the two chambers for simultaneously dispensing the fluid components therefrom when moved forward by plungers of the dispensing gun. In a first embodiment, the front end surface of one of the pistons is recessed from an outer end surface of the other piston to form a void space for collecting the collapsed flexible film therein to permit the outer piston to reach the full extent of its stroke and expel all of the fluid components from both the chambers. In a second embodiment, the first chamber containing the flexible film extends forwardly beyond the second chamber forming a void space beyond an end wall of the second chamber for collecting the collapsed compacted film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.