Integrated pump and sample vessel
US4628750A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 27, 1984 |
| Grant date | Dec 16, 1986 |
| Priority date | — |
| Expiry date | Sep 27, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N1/2035
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An integrated pump and sample vessel which eliminates dead volume between the point of collection of the sample and the sample vessel. The pump has a body with a longitudinal bore therethrough, a fluid flow passage in the body which allows fluid to enter and exit the pump, a resilient member located in the bore which has a face with a cavity therein exposed to the fluid flow passage and a sleeve which confines the resilient member. A sample vessel is adapted to be detachably mounted to the pump body with a face exposed to the fluid flow passage. A check valve is located in the sample vessel to selectively enable the entry of fluid from the flow passage of the pump. In the preferred embodiment, the check valve is located in an easily removable pod to facilitate service or adjustment. A diaphragm motor or other moving apparatus drives the face of the resilient member into contact with the face of an adapter or the face of the sample vessel which traps a sample of fluid in the cavity. The moving apparatus applies greater pressure and resiliently collapses the cavity which pumps sample past the check valve into the sample vessel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.