The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 03, 1981
Filed:
Jul. 11, 1979
Hermann Munnich, Bad Kissingen, DE;
Hermann Glockner, Schweinfurt, DE;
SKF Kugellagerfabriken GmbH, Schweinfurt, DE;
Abstract
Apparatus for determining the properties of lubricants which is of comparatively simplified construction and is capable of analyzing the properties of a lubricant in a relatively short period of time with a relatively small quantity of lubricant in a highly accurate manner. The apparatus comprises an axial cylindrical roller bearing supported on the frame of the apparatus by a hydrostatic cushion. The apparatus includes a disc member which supports the housing disc of the axial cylindrical roller bearing which is engaged by a leaf spring equipped with a resistant strain gauge for measuring the moment of friction. A bell-shaped top lies on the spindle disc of the axial cylindrical roller bearing and is rotated by motor with an infinitely variable drive to which a tachometer is connected by a distance gauge arranged between the disc member and the bell-shaped top which measures a change in the distance of the contact surface of the axial cylindrical roller bearings and consequently the lubricant film thickness. The apparatus includes, in the present instance, two recorders for converting the measuring impulses of the moment of friction, the distance of the contact surfaces of the axial cylindrical roller bearing and the rotational speed to provide curves of the moment of friction as a function of speed and the lubricating film thickness as a function of speed.