Automatic back-pressure valve for use in supercritical fluid chromatographic system
US11015717B2 · kind B2 · utility
0Cited by
4References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2017 |
| Grant date | May 25, 2021 |
| Priority date | — |
| Expiry date | Oct 26, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N30/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An automatic back-pressure valve comprises a spring support (1), an ejector rod spring (2), an ejector rod (3), a piston rod (4), a guide band (5), a cylinder body (6), an O-ring seal ring A (7), an O-ring seal ring B (8), a piston rod spring (9), a cylinder cover (10), a guide sleeve (11), a conical ceramic element (12), a seal ring (13), a sealing base (14), a valve body (15), a screw (16) and a positioning sleeve (17).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.