Measuring drive having ultrasound-mounted shaft, measuring device, method and use
AssigneeAnton Paar GmbH
InventorsMichael Krenn, Denis Schütz
Life of this patent
Estimating the term…
Abstract
Described is a measuring drive for a measuring instrument, in particular a rheometer. The measuring drive has: i) a motor, ii) a shaft, which is coupled to the motor in such a way that the shaft is drivable by the motor, and iii) an ultrasonic device, which is configured to provide ultrasound to the shaft in such a way that at least a part of the shaft is bearable substantially without contact by the ultrasound. Furthermore, the measuring instrument, a method, and a using are described.
Claims20
A measuring drive for a rheometer, the measuring drive comprising:
- a motor;
- a shaft which is coupled to the motor in such a way that the shaft is drivable by the motor, the shaft having a shaft element;
- and
- an ultrasonic device, which is configured to provide ultrasound to the shaft in such a way that at least a part of the shaft is bearable substantially without contact by the ultrasound,
- wherein the ultrasonic device is configured to bear the shaft element substantially without contact both in an axial direction and in a radial direction of the shaft.
A rheometer, for determining an information that is indicative of the rheological properties of a sample, the rheometer, comprising:
- a measuring drive including a motor,
- a shaft coupled to the motor in such a way that the shaft is drivable by the motor, the shaft having a shaft element, an ultrasonic device configured to provide ultrasound to the shaft in such a way that at least a part of the shaft is bearable substantially without contact by the ultrasound, wherein the ultrasonic device is configured to bear the shaft element substantially without contact both in the axial direction and in the radial direction of the shaft;
- and
- a sample carrier for positioning the sample, wherein the shaft is coupleable to the positioned sample.
A method for determining an information that is indicative of the rheological properties of a sample by a rheometer, which has a motor and a shaft coupled to the motor, the shaft having a shaft element, the method, comprising:
- providing the sample and coupling the shaft to the sample;
- driving the shaft by the motor so that indicative information is transferred to the movement characteristic of the shaft;
- emitting ultrasound by an ultrasonic device to the shaft in such a way that at least a part of the shaft is beared substantially without contact by the ultrasound;
- emitting ultrasound by the ultrasonic device in such a way that the shaft element is beared substantially without contact in the axial direction and in the radial direction of the shaft;
- and
- detecting the movement characteristics of the shaft to determine the information indicative of the rheological properties of the sample.
Dependencies are inferred from the claim text.