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US 7,017,393 B2Granted
Rotary rheometer magnetic bearing
AssigneeWaters Investment Limited
InventorsNigel Doe, Peter Foster
Life of this patent
Estimating the term…
Abstract
A rotary rheometer having a magnetic thrust bearing. The thrust disk of the magnetic thrust bearing being situated between a pair of magnetic actuator assemblies and extending beyond the circumference of the actuator assemblies so as to encompass the magnetic flux lines generated by the actuator assemblies, thus minimizing likelihood of an undesirable preferential position or side load.
Claims14
A rheometer comprising:
- a rotary shaft;
- at least one radial bearing;
- and
- a magnetic thrust bearing comprising:
- a thrust disk coaxial with the rotary shaft and positioned between two magnetic actuator assemblies, wherein an outer diameter of the thrust disk is larger than an outer diameter of the two magnetic actuator assemblies.
2 more elements
A magnetic thrust bearing for a rotary shaft, comprising:
- a pair of magnetic actuator assemblies;
- and
- a thrust disk coaxial with the rotary shaft and positioned between the pair of magnetic actuator assemblies,
- wherein an outer diameter of the thrust disk is larger than an outer diameter of the two magnetic actuator assemblies.
1 more element
A rotary motor, comprising:
- a rotary shaft;
- at least one radial bearing;
- and
- a magnetic thrust bearing comprising:
- a thrust disk coaxial with the rotary shaft and positioned between two magnetic actuator assemblies, wherein an outer diameter of the thrust disk is larger than
- an outer diameter of the two magnetic actuator assemblies.
3 more elements
Dependencies are inferred from the claim text.