Pump for delivering a product, comprising a piston sliding in the metering chamber
US9151281B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2012 |
| Grant date | Oct 6, 2015 |
| Priority date | — |
| Expiry date | Dec 10, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/1047
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The pump includes a piston slidably mounted in a metering chamber, the piston including a support, a diaphragm made of a first material and forming a check valve that allows fluid to flow into the metering chamber, and a presser element for pressing the diaphragm against the support, the presser element including a skirt carrying seal enabling the piston to slide in leaktight manner in the metering chamber, the presser element being made of a second material different from the first material of the diaphragm, being fitted against the diaphragm, and having a diaphragm presser surface that holds the diaphragm deformed against the support in order to close the check valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.