Patent Number: 6,167,752

Title: Rotary viscometer with an air bearing

Abstract: A rotary viscometer has a measuring motor which drives a measuring shaft that carries a disc mounted in an air bearing of a stator. The viscometer has a normal force measuring drive defined by at least one position sensor for determinal movements of the measuring shaft on the basis of viscoelastic properties of the substance to be investigated, such as a liquid. To measure the normal force in the region of the air bearing, the position sensors are disposed in the region of the air bearing on the stator, and in particular they are embedded in the stator and absorb the movements of the disc in the axial direction of the measuring shaft with resect to the stator.

Inventors: Raffer; Gerhard (Graz, AT)

Assignee: Anton Paar GmbH

International Classification: G01N 11/10 (20060101); G01N 11/14 (20060101); G01N 011/14 ()

Expiration Date: 01/02/2018