Patent · US Active

NMR MAS rotor assembly with porous ceramic bearings

US8212565B2 · kind B2 · utility

3Cited by
9References
6Claims
0Family size

Assignee

Inventor

Key dates

Filing dateOct 29, 2009
Grant dateJul 3, 2012
Priority date—
Expiry dateJun 24, 2030

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01R33/307
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

Each NMR rotor bearing in an NMR magic angle spinning assembly is constructed of a porous ceramic material and has no inlet channels or nozzles. Instead, pressurized gas is forced through pores in the bearing ceramic material from an annular groove at the bearing periphery to the central aperture. Since the pores are small and very numerous, the gas pressure is effectively balanced around the periphery of the central aperture. In addition, if contaminants block one or more pores during operation, the pores are so numerous that the balanced pressure can still be maintained in the central aperture, thereby preventing an imbalance that could destroy the rotor.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.