Holding of NMR measurement samples in a space-restricted NMR spectrometer
US12399239B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Aug 30, 2023 |
| Grant date | Aug 26, 2025 |
| Priority date | — |
| Expiry date | Aug 30, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An NMR spectrometer (10) with a permanent magnet device (11) with measurement volume (12) and bore (13) for inserting an NMR measurement sample contained in a sample tube (14), and with an RF coil (15) outside a cylindrical temperature control pipe (16) with a continuous annular air gap (17) through which temperature control gas can be conducted through a gas inlet (18), is characterized in that on the end opposite the gas inlet, a movable holding device (19) is installed which, in a first operating position, does not touch the sample tube, in a second operating position, holds the sample tube in its measuring position at its outer circumference in a force-fitting and/or form-fitting manner with an axially acting force or static friction Ff, and, in a third operating position, releases the sample tube for removal, and that in the second operating position Ff>Fdynamic−Fweight, where Fdynamic is the buoyancy force generated by the dynamic pressure of the temperature control gas flowing onto the sample tube and Fweight is the weight force of the sample tube. This enables the problems of known arrangements of the type in question with the dynamic pressure caused by the temperature cont…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.