Metering pump for dispensing liquid
US7980425B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 2007 |
| Grant date | Jul 19, 2011 |
| Priority date | — |
| Expiry date | Mar 15, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/469
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A pump for metering a liquid is disclosed comprising a flexible tube connected to a container with a pressure relief valve located in the flexible tube. A housing defines an aperture for receiving the flexible tube with a compression surface located adjacent to the aperture. A reciprocating member has a sealing element and a pumping element. A drive moves the sealing element for pinching the flexible tube against the compression surface upstream from the pressure relief valve for trapping liquid between the sealing element and the pressure relief valve. The drive moves the pumping element for collapsing the flexible tube against the compression surface for pumping the trapped liquid to discharge a metered quantity of the liquid from the pressure relief valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.