Check valve for fluid delivery system
US5095932A · kind A · utility
2Cited by
7References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 21, 1990 |
| Grant date | Mar 17, 1992 |
| Priority date | — |
| Expiry date | Dec 21, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/794
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A check valve for use in a fluid delivery system is provided to deliver precise volumes of a plurality of fluids in sequence to a treatment reservoir. The check valve is in fluid communication with a positive displacement pump and with fluid reservoir. The check valve includes a housing for securing check valve elements adjacent a plate having an inlet and an outlet. The check valve includes a diaphragm positioned to seal or to open fluid communication between a check valve inlet and a check valve outlet. A fluid by-pass is provided for passage of a pressurizing fluid around the check valve into the fluid reservoir.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.