Non-return valve, in particular for medical uses
US8291936B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2008 |
| Grant date | Oct 23, 2012 |
| Priority date | — |
| Expiry date | Jan 19, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7879
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A nonreturn valve includes a first tube connection housing and a second tube connection housing and a diaphragm disk between the first and second tube connection housings. The disk can be lifted from an annular valve seat upon an overpressure in an inlet channel and can be pressed onto the valve seat upon an overpressure in an outlet channel. The diaphragm disk has an annular bead received in mutually opposite annular grooves of the tube connection housings. The diaphragm disk is provided, radially outside the valve seat, with openings leading to an outlet chamber. The second tube connection housing lying opposite the openings is provided with recesses which communicate with the outlet channel and are separated from each other by supporting surfaces for the diaphragm disc. The recesses are connected to the outlet channel by narrow deep grooves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.