Dispenser drain attachment for flowable media
US6752295B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 14, 2001 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | Dec 14, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/1064
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A dispenser drain attachment includes a threaded cap having a tapered drain socket and an associated drain tube. The interior of the drain tube has a double diaphragm which seals the drain tube, as well as an elastic gas bellows for dispensing liquid portions by alternating deformation of the diaphragm disks of the double diaphragm, which acts as a one-way valve. Such deformation is the result of pressure conditions which change when the gas bellows is compressed and then again released. The dispenser drain attachment is assembled from only two one-piece structural parts, each of which is produced by a two-component injection molding procedure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.