Liquid transfer valve
US4152391A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 16, 1977 |
| Grant date | May 1, 1979 |
| Priority date | — |
| Expiry date | Dec 16, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N35/1097
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A liquid transfer valve assembly capable of measuring and transferring plural different volumes from a sample source to defined flow paths under the influence of pressurized fluid. The preferred valve assembly includes a pair of stationary outer disc members and a movable inner disc member sandwiched therebetween, their facing surfaces sealingly frictionally engaged. Each of the discs has a central axial passage arranged for mounting on a spindle, with the sandwiched disc having a radial pin entering its axial passage for cooperation with a slotted spindle, the rotation of the spindle rotating only said sandwiched disc relative between a pair of positions. The center disc carries at least a segmenting bore pair, at least one of the bores being a measuring passage and having a precise volume. A matching port pair is provided in each of the outer discs defining flow paths through the valve arranged selectively to be intercepted by said measuring bore of the segmenting bore pair. The center disc also carries at least one exterior sample loop sealingly fixedly secured thereto and communicating to passageways formed in the disc. A flow path also is defined in said center disc to communi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.